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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Effects of Interest Rate Swap on Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Currency Swap
Derivative Instruments, Gain (Loss) [Line Items]
Other comprehensive income (loss), Cross Currency Swaps	$ 5.2	$ 7.0

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details

REVENUES

3 Months Ended

Mar. 31, 2026

Revenue from Contract with Customer [Abstract]

REVENUES

The Company’s Revenues by segment and by payer group were as follows:


	Three Months Ended March 31, 2026								Three Months Ended March 31, 2025
	North America		Europe		Other		Total		North America		Europe		Other		Total
Dx:
Clients	23	%	—	%	—	%	23	%	24	%	—	%	—	%	24	%
Patients	10	%	—	%	—	%	10	%	10	%	—	%	—	%	10	%
Medicare and Medicaid	8	%	—	%	—	%	8	%	8	%	—	%	—	%	8	%
Third party	37	%	—	%	—	%	37	%	36	%	—	%	—	%	36	%
Total Dx revenues	78	%	—	%	—	%	78	%	78	%	—	%	—	%	78	%

BLS:




Pharmaceutical, biotechnology, medical device, diagnostic companies, and CROs	8	%	10	%	4	%	22	%	9	%	9	%	4	%	22	%

Total Revenues	86	%	10	%	4	%	100	%	87	%	9	%	4	%	100	%

Revenues in the U.S. were $2,914.0 (82.4%) and $2,813.8 (84.1%) for the three months ended March 31, 2026, and 2025, respectively.

Accounts Receivable, Unbilled Services, and Unearned Revenue

The following table provides information about accounts receivable and unbilled services from contracts with customers:


	March 31, 2026		December 31, 2025
Dx accounts receivable	$	1,513.2	$	1,349.0
BLS accounts receivable	808.4		791.2
Less: BLS allowance for credit losses	(33.0)		(36.4)
Accounts receivable, net	$	2,288.6	$	2,103.8

Gross unbilled services	$	166.2	$	164.0
Less: BLS allowance for credit losses	(4.3)		(7.1)
Unbilled services, net	$	161.9	$	156.9

Revenues recognized during the period that were included in the unearned revenue balance at the beginning of the period were $58.3 and $68.9 for the three months ended March 31, 2026, and 2025, respectively.

Allowance for Credit Losses

BLS estimates future expected credit losses on Accounts receivable, net and Unbilled services, net over the remaining collection period of the instrument. The rollforward for the allowance for credit losses was as follows:


	Accounts Receivable, net		Unbilled Services, net		Total
Allowance for credit losses at December 31, 2025	$	36.4	$	7.1	$	43.5
Credit loss expense	(0.1)		—		(0.1)
Write-offs	(3.0)		(2.8)		(5.8)
Foreign currency impact	(0.3)		—		(0.3)
Allowance for credit losses at March 31, 2026	$	33.0	$	4.3	$	37.3

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

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+ Details

BASIS OF FINANCIAL STATEMENT PRESENTATION	3 Months Ended
BASIS OF FINANCIAL STATEMENT PRESENTATION	Mar. 31, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF FINANCIAL STATEMENT PRESENTATION	BASIS OF FINANCIAL STATEMENT PRESENTATION Labcorp® Holdings Inc. (Labcorp, LHI, or the Company) is a global leader of innovative and comprehensive laboratory services that provides vital information to help doctors, hospitals, pharmaceutical companies, researchers, and patients make clear and confident decisions. By leveraging its unparalleled diagnostics and drug development capabilities, the Company provides insights and accelerates innovations to improve health and improve lives. The Company reports its business in two segments, Diagnostics Laboratories and Biopharma Laboratory Services. During each of the three months ended March 31, 2026, and 2025, Dx and BLS contributed approximately 78% and 22%, respectively, of Revenues to the Company. The accompanying Condensed Consolidated Financial Statements of the Company are unaudited. In the opinion of management, all adjustments necessary for a fair statement of results of operations, cash flows, and financial position have been made. Except as otherwise disclosed, all such adjustments are of a normal recurring nature. Interim results are not necessarily indicative of results for a full year. The balance sheet for the year ended December 31, 2025 presented herein, was derived from the Company’s annual audited Consolidated Financial Statements but does not include all disclosures required by GAAP, which are contained within the Annual Report. These unaudited Condensed Consolidated Financial Statements and notes are presented in accordance with the rules and regulations of the SEC and GAAP for interim reporting. As such, certain notes or other information that are normally required by the SEC or GAAP have been omitted if they substantially duplicate the disclosures contained in the Company’s annual audited Consolidated Financial Statements contained within its Annual Report. Accordingly, these Condensed Consolidated Financial Statements and notes should be read in conjunction with the Consolidated Financial Statements and notes thereto contained in the Company’s Annual Report. These Condensed Consolidated Financial Statements include the accounts of the Company and its majority-owned subsidiaries for which it exercises control. Long-term investments in affiliated companies in which the Company exercises significant influence, but which it does not control, are accounted for using the equity method. The Company also has investments in other companies or investment funds that develop technology relating to the Company’s operations. Investments in which the Company does not exercise significant influence (generally, when the Company has an investment of less than 20% and no representation on the investee’s board of directors) are accounted for at fair value, or at cost minus impairment adjusted for observable price changes in orderly transactions for an identical or similar investment of the same issuer for those investments that do not have readily determinable fair values. The carrying value of these type of investments was $201.6 and $201.9 at March 31, 2026 and December 31, 2025, respectively, and is included within Other assets, net in the Company’s Condensed Consolidated Balance Sheets. All significant intercompany transactions and accounts have been eliminated. The Company does not have any significant variable interest entities or special purpose entities whose financial results are not included in these Condensed Consolidated Financial Statements. The financial statements of the Company’s operating foreign subsidiaries are measured using the local currency as the functional currency. Assets and liabilities are translated at exchange rates as of the balance sheet date. Revenues and expenses are translated at average monthly exchange rates prevailing during the period. Resulting translation adjustments are included in Accumulated other comprehensive loss within the Condensed Consolidated Balance Sheets. Recent Accounting Pronouncements In July 2025, the FASB issued ASU 2025-05, Financial Instruments — Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets. This accounting pronouncement provides all entities with a practical expedient to assume that current conditions as of the balance sheet date do not change for the remaining life of the assets when measuring credit losses. ASU 2025-05 is effective for fiscal years beginning after December 15, 2025. This accounting pronouncement did not have a material impact on the Company’s Condensed Consolidated Financial Statements. In September 2025, the FASB issued ASU 2025-06, Intangibles — Goodwill and Other — Internal-Use-Software (Topic 350): Targeted Improvements to the Accounting for Internal-Use Software. This accounting pronouncement improves the operability of the existing guidance by removing all references to software development project stages so that the guidance is neutral to different software development methods. ASU 2025-06 is effective for fiscal years beginning after December 15, 2027. The Company is currently assessing the impact that adopting this accounting pronouncement will have on its Condensed Consolidated Financial Statements. In December 2025, the FASB issued ASU 2025-10, Government Grants (Topic 832): Accounting for Government Grants Received by Business Entities. This accounting pronouncement establishes guidance on the recognition, measurement, and presentation of government grants received by business entities. ASU 2025-10 is effective for fiscal years beginning after December 15, 2028. The Company is currently assessing the impact that adopting this accounting pronouncement will have on its Condensed Consolidated Financial Statements. In December 2025, the FASB issued ASU 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements. This accounting pronouncement is intended to improve the navigability of guidance in ASC 270, Interim Reporting, and clarify when it applies. ASU 2025-11 is effective for fiscal years beginning after December 15, 2027. The Company is currently assessing the impact that adopting this accounting pronouncement will have on its future interim reporting. In December 2025, the FASB issued ASU 2025-12, Codification Improvements. This accounting pronouncement addresses suggestions received from stakeholders regarding the Accounting Standards Codification and makes other incremental improvements to GAAP that clarify, correct errors in, or make other improvements to a variety of topics that are intended to make it easier to understand and apply. ASU 2025-12 is effective for fiscal years beginning after December 15, 2026. The Company is currently assessing the impact that adopting this accounting pronouncement will have on its Condensed Consolidated Financial Statements.

SUPPLEMENTAL CASH FLOW INFORMATION Description Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Cash paid during period for:
Interest	$ 45.2	$ 92.4
Income taxes, net of refunds	13.1	20.3
Disclosure of non-cash financing and investing activities:
Change in accrued property, plant, and equipment	(7.0)	(15.4)
Contingent consideration related to business acquisitions	$ 89.8	$ 24.0

PREFERRED STOCK AND COMMON SHAREHOLDERS' EQUITY

3 Months Ended

Mar. 31, 2026

Stockholders' Equity Note [Abstract]

PREFERRED SSTOCK AND COMMON SHAREHOLDERS' EQUITY

PREFERRED STOCK AND COMMON SHAREHOLDERS’ EQUITY

The Company is authorized to issue up to 265.0 shares of its Common Stock. The Company is authorized to issue up to 30.0 shares of preferred stock, par value $0.10 per share. There were no preferred shares outstanding at March 31, 2026, and December 31, 2025.

The changes in the Company’s shares of Common Stock issued and outstanding are summarized below:


			Three Months Ended March 31, 2026
Beginning balance			82.2
Shares issued under employee stock plans			0.5


Shares repurchased			(0.4)

Ending balance			82.3

Share Repurchase Program

The Company has entered and may continue to enter into Rule 10b5-1 plans from time to time to facilitate repurchases of its Common Stock. During the three months ended March 31, 2026, the Company purchased 0.4 shares of its Common Stock at an average price of $273.76 per share for a total cost of $98.0. During the three months ended March 31, 2025, the Company did not repurchase any shares of its Common Stock. At March 31, 2026, the Company had outstanding authorization from its Board to purchase up to $732.4 maximum value of shares of Common Stock.

When the Company repurchases shares of Common Stock, the amount paid to repurchase the shares in excess of the par or stated value is allocated to Additional paid-in-capital within the Condensed Consolidated Balance Sheet unless subject to

limitation or the balance in Additional paid-in-capital is exhausted. Remaining amounts are recognized as a reduction in Retained earnings within the Company’s Condensed Consolidated Balance Sheet.

Dividends

During the three months ended March 31, 2026, and 2025, the Company declared and paid a cash dividend of $0.72 per share of Common Stock.

On April 9, 2026, the Company announced a cash dividend of $0.72 per share of Common Stock, or approximately $60.0 in the aggregate. The dividend will be paid on June 11, 2026, to stockholders of record of all issued and outstanding shares of Common Stock as of the close of business on May 29, 2026. The declaration and payment of any future dividends will be at the discretion of the Board.

Accumulated Other Comprehensive Loss

The components of Accumulated other comprehensive loss were as follows:


	Foreign Currency Translation Adjustments		Net Benefit Plan Adjustments		Accumulated Other Comprehensive Loss
Balance at December 31, 2024	$	(264.7)	$	3.1	$	(261.6)
Current year adjustments	69.7		0.4		70.1
Tax effect on adjustments	—		(0.1)		(0.1)
Balance at March 31, 2025	$	(195.0)	$	3.4	$	(191.6)

Balance at December 31, 2025	$	(33.0)	$	5.4	$	(27.6)
Current year adjustments	(36.0)		0.5		(35.5)


Tax effect of adjustments	—		(0.1)		(0.1)
Balance at March 31, 2026	$	(69.0)	$	5.8	$	(63.2)

- Definition

The entire disclosure for equity.

+ References

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-Section S50
-Paragraph 3
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-Topic 855
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-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 1.B.3)
-Publisher FASB
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+ Details

GOODWILL AND INTANGIBLE ASSETS (Tables)

3 Months Ended

Mar. 31, 2026

Intangible Asset, Goodwill and Other [Abstract]

Changes in Carrying Amount of Goodwill

The balances, net of impairment, and changes in the carrying amount of goodwill were as follows:


	Dx		BLS		Total

Beginning Balance at December 31, 2025	$	5,434.8	$	1,354.7	$	6,789.5
Goodwill acquired, excluding measurement period adjustments	146.6		—		146.6



Foreign currency impact and other adjustments to goodwill	28.1		(9.0)		19.1
Ending Balance at March 31, 2026	$	5,609.5	$	1,345.7	$	6,955.2

Intangible Asset and Goodwill [Table Text Block]

The components of identifiable intangible assets were as follows:


				March 31, 2026						December 31, 2025
	Range of Useful Lives (in Years)			Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Definite-lived intangible assets:
Customer relationships	10	-	36	$	4,615.8	$	(1,850.7)	$	2,765.1	$	4,525.3	$	(1,816.3)	$	2,709.0
Patents, licenses, and technology	3	-	15	546.8		(344.5)		202.3		548.7		(337.5)		211.2
Non-compete agreements	3	-	5	221.3		(114.7)		106.6		213.5		(108.0)		105.5
Other	1	-	15	40.1		(30.6)		9.5		40.0		(28.9)		11.1
Total definite-lived intangible assets				$	5,424.0	$	(2,340.5)	$	3,083.5	$	5,327.5	$	(2,290.7)	$	3,036.8

Indefinite-lived intangible assets:
Canadian and other licenses				$	552.6	N/A		$	552.6	$	559.2	N/A		$	559.2


Total intangible assets				$	5,976.6	$	(2,340.5)	$	3,636.1	$	5,886.7	$	(2,290.7)	$	3,596.0

- Definition

Tabular disclosure of goodwill.

+ References

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-Topic 350
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-URI https://asc.fasb.org/1943274/2147482573/350-20-50-1A

+ Details

BUSINESS SEGMENT INFORMATION (Tables)

3 Months Ended

Mar. 31, 2026

Segment Reporting [Abstract]

Segment Reporting [Table Text Block]


	For the Three Months Ended March 31, 2026
Revenues:	Dx		BLS		Intercompany eliminations and other		LHI
Revenues	$	2,762.1	$	780.6	$	(5.1)	$	3,537.6

Operating Earnings:
Labor	1,188.1		309.3
Supplies	613.5		121.5
Shipping costs			110.8
Depreciation	63.8		28.6
Other operating expenses	438.0		89.7
Segment operating income	$	458.7	$	120.7			$	579.4
General corporate and unallocated expenses							(116.6)
Amortization of intangibles and other assets							(75.6)
Restructuring and other charges							(6.4)

Total Operating income							380.8
Other (expense) income:
Interest expense							(55.1)
Investment income							12.2
Equity method loss, net							(5.1)
Other, net							(13.1)
Earnings from operations before income taxes							$	319.7


	For the Three Months Ended March 31, 2025
Revenues:	Dx		BLS		Intercompany eliminations and other		LHI
Revenues	$	2,629.6	$	721.3	$	(5.8)	$	3,345.1

Operating Earnings:
Labor	1,123.6		289.7
Supplies	586.6		111.1
Shipping costs			95.0
Depreciation	61.7		28.6
Other operating expenses	430.2		90.0
Segment operating income	$	427.5	$	106.9			$	534.4
General corporate and unallocated expenses							(132.4)
Amortization of intangibles and other assets							(69.6)
Restructuring and other charges							(6.4)

Total Operating income							326.0
Other (expense) income:
Interest expense							(56.0)
Investment income							6.5
Equity method loss, net							(0.3)
Other, net							(1.0)
Earnings from operations before income taxes							$	275.2

- Definition

Tabular disclosure of segment reporting. Includes, but is not limited to, reconciliation of reportable segment amount to corresponding consolidated total.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 10
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+ Details

PREFERRED STOCK AND COMMON SHAREHOLDERS' EQUITY (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions				3 Months Ended
	Jun. 11, 2026	May 29, 2026	Apr. 09, 2026	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Rollforward of common shares issued
Common Stock, Shares Authorized				265.0
Preferred Stock, Shares Authorized				30.0
Preferred Stock, Par or Stated Value Per Share				$ 0.10
Preferred Stock, Shares Outstanding				0.0		0.0
Common stock, 82.3 and 82.2 shares outstanding at March 31, 2026, and December 31, 2025, respectively				82.3		82.2
Stock Repurchased and Retired During Period, Shares				0.4	0.0
Dividends declared				$ 60.2	$ 60.6
Stock Repurchased and Retired During Period, Shares				0.4	0.0
Shares Acquired, Average Cost Per Share				$ 273.76
Purchase of common stock				$ 98.0	$ 0.0
Share Repurchase Program, Remaining Authorized, Amount				$ 732.4
Common Stock, Dividends, Per Share, Cash Paid				$ 0.72	$ 0.72
Subsequent Event [Member] \| O2025Q2Dividends [Member]
Rollforward of common shares issued
Dividends Payable, Date Declared			Apr. 09, 2026
Dividends Payable, Amount Per Share			$ 0.72
Dividends declared			$ 60.0
Dividends Payable, Date to be Paid	Jun. 11, 2026
Dividends Payable, Date of Record		May 29, 2026
Common Stock [Member]
Rollforward of common shares issued
Common shares issued, beginning balance (in shares)				82.2
Commons Stock Issued During Period Shares Employee Stock Plans				0.5
Common shares issued, ending balance (in shares)				82.3
Common stock, 82.3 and 82.2 shares outstanding at March 31, 2026, and December 31, 2025, respectively				82.3		82.2
Stock Repurchased and Retired During Period, Shares				0.4
Stock Repurchased and Retired During Period, Shares				0.4

EARNINGS PER SHARE (Reconciliation of Basic Earnings Per Share to Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Per Share Amount [Abstract]
Net Income (Loss) Available to Common Stockholders	$ 277.8	$ 212.8
Net earnings, basic (in shares)	82.3	83.6
Dilutive effect of employee stock options and awards, (in shares)	0.6	0.7
Weighted Average Number of Shares Outstanding, Diluted	82.9	84.3
Basic earnings per share (in dollars per share)	$ 3.37	$ 2.54
Diluted earnings per share (in dollars per share)	$ 3.35	$ 2.52

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
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+ Details

DEBT (Short-term borrowings and current portion of long-term debt) (Table) (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Short-term Debt [Line Items]
Short term debt issuance costs	$ 0.0	$ (0.2)
Notes Payable	0.4	0.3
Short-term borrowings and current portion of long-term debt	500.4	500.1
Current Portion of Long-term Debt
Short-term Debt [Line Items]
1.55% senior notes due 2026	$ 500.0	$ 500.0
1.55% Senior Notes Due 2026
Short-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.55%

GOODWILL AND INTANGIBLE ASSETS (Changes in Carrying Amount of Goodwill) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Goodwill [Line Items]
Goodwill	$ 6,955.2	$ 6,789.5
Goodwill acquired, excluding measurement period adjustments	146.6
Foreign currency impact and other adjustments to goodwill	19.1
Goodwill Impairment, Cumulative	648.5	648.5
Diagnostics
Goodwill [Line Items]
Goodwill	5,609.5	5,434.8
Goodwill acquired, excluding measurement period adjustments	146.6
Foreign currency impact and other adjustments to goodwill	28.1
Biopharma Laboratory Services
Goodwill [Line Items]
Goodwill	1,345.7	$ 1,354.7
Goodwill acquired, excluding measurement period adjustments	0.0
Foreign currency impact and other adjustments to goodwill	$ (9.0)

- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

+ References

+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

EARNINGS PER SHARE (Potential common shares not included in computation of diluted earnings per share) (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Earnings Per Share [Abstract]
Employee stock options and awards	0.3	0.3

BUSINESS ACQUISITIONS

3 Months Ended

Mar. 31, 2026

Business Combination [Abstract]

BUSINESS ACQUISITIONS AND DISPOSITIONS

BUSINESS ACQUISITIONS

During the three months ended March 31, 2026, the Company acquired various businesses and related assets for total consideration of $312.0. Total consideration includes cash payments and, as applicable, contingent consideration payable by the Company primarily upon the achievement of specified future performance targets of the acquired businesses. The preliminary purchase considerations for these acquisitions were allocated under the acquisition method of accounting to the estimated fair market value of the net assets acquired. A residual amount of tax-deductible goodwill, including measurement period adjustments relating to prior acquisitions, of $175.9 was recorded during the three months ended March 31, 2026. The purchase price allocations for these acquisitions were preliminary at March 31, 2026. The valuation of acquired assets and assumed liabilities included the following:


	Empire City Laboratories, Inc.		Other Acquisitions Closed During the Three Months Ended March 31, 2026		Measurement Period Adjustments		Amounts Acquired During the Three Months Ended March 31, 2026





Property, plant, and equipment	$	—	$	2.4	$	—	$	2.4

Goodwill	117.5		29.1		29.3		175.9
Intangible assets	132.5		32.9		(29.3)		136.1

Total assets acquired	250.0		64.4		—		314.4





Other liabilities	—		2.4		—		2.4
Total liabilities acquired	—		2.4		—		2.4
Net assets acquired	250.0		62.0		—		312.0
Contingent consideration	(85.0)		(4.8)		—		(89.8)
2025 escrow payment	—		(20.0)		—		(20.0)
Cash paid for acquisitions	$	165.0	$	37.2	$	—	$	202.2

Intangible assets recognized from business acquisitions that closed during the three months ended March 31, 2026, including any related measurement period adjustments, and their weighted-average amortization periods were as follows:


	Amount		Weighted-average Amortization Period (in Years)
Customer relationships	$	137.3	15.0
Non-compete agreements	28.1		5.0


Total	$	165.4

On November 13, 2025, the Company announced that it entered into an agreement with Parkview Health System, Inc. to acquire select assets of the health system’s outreach laboratory services for a purchase price of approximately $165.0. The transaction is anticipated to close in 2026, subject to customary closing conditions and applicable regulatory approvals for a transaction of this type.

Unaudited Supplemental Pro Forma Information

If the aggregate of the Company’s 2026 and 2025 acquisitions, that were accounted for as business combinations, had been completed at January 1, 2025, the Company’s pro forma results would have been as follows:


	Three Months Ended March 31,
		2026		2025
Revenues		$	3,596.7	$	3,410.2
Net earnings attributable to LHI		$	286.7	$	222.6

- Definition

The entire disclosure for business combination.

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+ Details

REVENUES Disaggregated Revenue Table (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	100.00%	100.00%
Revenues	$ 3,537.6	$ 3,345.1
North America
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	86.00%	87.00%
Europe [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	10.00%	9.00%
Other countries [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	4.00%	4.00%
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues	$ 2,914.0	$ 2,813.8
Percent of Domestic Revenue	82.40%	84.10%
Diagnostics
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	78.00%	78.00%
Diagnostics \| North America
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	78.00%	78.00%
Diagnostics \| Europe [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	0.00%	0.00%
Diagnostics \| Other countries [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	0.00%	0.00%
Diagnostics \| Client [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	23.00%	24.00%
Diagnostics \| Client [Member] \| North America
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	23.00%	24.00%
Diagnostics \| Client [Member] \| Europe [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	0.00%	0.00%
Diagnostics \| Client [Member] \| Other countries [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	0.00%	0.00%
Diagnostics \| Self-Pay [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	10.00%	10.00%
Diagnostics \| Self-Pay [Member] \| North America
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	10.00%	10.00%
Diagnostics \| Self-Pay [Member] \| Europe [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	0.00%	0.00%
Diagnostics \| Self-Pay [Member] \| Other countries [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	0.00%	0.00%
Diagnostics \| Medicare and Medicaid [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	8.00%	8.00%
Diagnostics \| Medicare and Medicaid [Member] \| North America
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	8.00%	8.00%
Diagnostics \| Medicare and Medicaid [Member] \| Europe [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	0.00%	0.00%
Diagnostics \| Medicare and Medicaid [Member] \| Other countries [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	0.00%	0.00%
Diagnostics \| Third party [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	37.00%	36.00%
Diagnostics \| Third party [Member] \| North America
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	37.00%	36.00%
Diagnostics \| Third party [Member] \| Europe [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	0.00%	0.00%
Diagnostics \| Third party [Member] \| Other countries [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	0.00%	0.00%
Biopharma Laboratory Services
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	22.00%	22.00%
Biopharma Laboratory Services \| Biopharmaceutical and medical device companies [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	22.00%	22.00%
Biopharma Laboratory Services \| Biopharmaceutical and medical device companies [Member] \| North America
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	8.00%	9.00%
Biopharma Laboratory Services \| Biopharmaceutical and medical device companies [Member] \| Europe [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	10.00%	9.00%
Biopharma Laboratory Services \| Biopharmaceutical and medical device companies [Member] \| Other countries [Member]
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	4.00%	4.00%

DEBT (Long-term debt) (Details) - USD ($) $ in Millions	Mar. 31, 2026	Mar. 20, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
2026 Term Loan	$ 750.0	$ 750.0	$ 0.0
3.60% senior notes due 2027	600.0		600.0
2.95% senior notes due 2029	650.0		650.0
4.35% senior notes due 2030	650.0		650.0
2.70% senior notes due 2031	446.2		447.3
4.55% senior notes due 2032	500.0		500.0
4.80% senior notes due 2034	850.0		850.0
4.70% senior notes due 2045	900.0		900.0
Long term debt issuance costs	(37.5)		(37.7)
Long-term debt	$ 5,833.7		5,084.6
3.60% senior notes due 2027
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.60%
2.95% senior notes due 2029
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.95%
4.35% senior notes due 2030
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.35%
2.70% senior notes due 2031
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.70%
4.55% senior notes due 2032
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.55%
4.80% senior notes due 2034
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.80%
4.70% senior notes due 2045
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.70%
Accounts receivable securitizaiton
Debt Instrument [Line Items]
AR Facility	$ 525.0		$ 525.0

FAIR VALUE MEASUREMENTS AND DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Noncontrolling interest put	$ 16.9	$ 16.9
Cross currency swaps	268.8	274.0
Interest rate swaps	53.8	52.7
Cash surrender value of life insurance policies	102.3	99.6
Deferred compensation asset	56.5
Deferred compensation liability	153.5	150.5
Contingent consideration	139.8	50.0
Fair market value of senior notes	4,915.9	4,963.6
Long-term debt	5,833.7	5,084.6
Derivative, Interest Rate Swap	$ 500.0
Three month SOFR	1.33%
2029 Maturing Swap Agreements
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Derivative, Notional Amount	$ 300.0
2034 Maturing Swap Agreements
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Derivative, Notional Amount	600.0
2031 Swap Agreements
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Derivative, Notional Amount	300.0
Swap Agreements
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Derivative, Notional Amount	$ 1,200.0
2.70% senior notes due 2031
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Subordinated Borrowing, Interest Rate	2.70%
Level 1 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Noncontrolling interest put	$ 0.0	0.0
Cross currency swaps	0.0	0.0
Interest rate swaps	0.0	0.0
Cash surrender value of life insurance policies	0.0	0.0
Deferred compensation asset	0.0	0.0
Deferred compensation liability	0.0	0.0
Contingent consideration	0.0	0.0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Noncontrolling interest put	16.9	16.9
Cross currency swaps	268.8	274.0
Interest rate swaps	53.8	52.7
Cash surrender value of life insurance policies	102.3	99.6
Deferred compensation asset	56.5	53.1
Deferred compensation liability	153.5	150.5
Contingent consideration	0.0	0.0
Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Noncontrolling interest put	0.0	0.0
Cross currency swaps	0.0	0.0
Interest rate swaps	0.0	0.0
Cash surrender value of life insurance policies	0.0	0.0
Deferred compensation asset	0.0	0.0
Deferred compensation liability	0.0	0.0
Contingent consideration	139.8	$ 50.0
Additions from business acquisitions	89.8
Level 3 [Member] \| Accrued Liabilities
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Contingent consideration	75.5
Level 3 [Member] \| Other liabilities
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Contingent consideration	$ 64.3

SUPPLEMENTAL CASH FLOW INFORMATION (Tables)

3 Months Ended

Mar. 31, 2026

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information


	Three Months Ended March 31,
	2026		2025

Cash paid during the period for:
Interest	$	45.2	$	92.4
Income taxes, net of refunds	$	13.1	$	20.3
Disclosure of non-cash financing and investing activities:



Change in accrued property, plant, and equipment	$	(7.0)	$	(15.4)
Contingent consideration related to business acquisitions	$	89.8	$	24.0

EARNINGS PER SHARE (Tables)

3 Months Ended

Mar. 31, 2026

Earnings Per Share [Abstract]

Reconciliation of Basic earnings per Share to Diluted Earnings per Share

The following represents a reconciliation of Basic EPS to Diluted EPS:


	Three Months Ended March 31,
	2026					2025
	Basic EPS		Dilutive Effect	Diluted EPS		Basic EPS		Dilutive Effect	Diluted EPS

Net earnings attributable to LHI	$	277.8		$	277.8	$	212.8		$	212.8
Weighted-average common shares outstanding	82.3		0.6	82.9		83.6		0.7	84.3


Per share amount	$	3.37		$	3.35	$	2.54		$	2.52

Potential common shares not included in computation of diluted earnings per share

The following table summarizes the potential common shares not included in the computation of Diluted EPS because their impact would have been antidilutive:


	Three Months Ended March 31,
		2026	2025
Employee stock options and awards		0.3	0.3

GOODWILL AND INTANGIBLE ASSETS (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Intangible Asset, Goodwill and Other [Abstract]
Intangible Asset, Including Goodwill, Impairment Loss	$ 0.0	$ 0.0
Intangible Asset, Finite-Lived [Line Items]
Amortization of intangible assets	75.6	$ 69.6
Estimated amortization expense, remainder of 2026	223.0
Estimated amortization expense, 2027	287.8
Estimated amortization expense, 2028	280.2
Estimated amortization expense, 2029	267.0
Estimated amortization expense, 2030	258.7
Estimated amortization expense, Thereafter	$ 1,766.8

SUPPLEMENTAL CASH FLOW INFORMATION

3 Months Ended

Mar. 31, 2026

Supplemental Cash Flow Elements [Abstract]

SUPPLEMENTAL CASH FLOW INFORMATION


	Three Months Ended March 31,
	2026		2025

Cash paid during the period for:
Interest	$	45.2	$	92.4
Income taxes, net of refunds	$	13.1	$	20.3
Disclosure of non-cash financing and investing activities:



Change in accrued property, plant, and equipment	$	(7.0)	$	(15.4)
Contingent consideration related to business acquisitions	$	89.8	$	24.0

PREFERRED STOCK AND COMMON SHAREHOLDERS' EQUITY PREFERRED STOCK AND COMMON SHAREHOLDERS' EQUITY - Accumulated Other Comprehensive Earnings (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ (69.0)	$ (195.0)
Other comprehensive income before reclassifications	(36.0)	69.7
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	0.0	0.0
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax	5.8	3.4
Accumulated other comprehensive loss	(63.2)	(191.6)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax	0.5	0.4
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(35.5)	70.1
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	0.1	0.1
Tax effect of adjustments	0.1	0.1
Accumulated Other Comprehensive Earnings [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax, Beginning Balance	(33.0)	(264.7)
Other comprehensive income before reclassifications	(36.0)	69.7
Tax effect of adjustments	0.0	0.0
Foreign Currency Translation Adjustments, Ending balance	(69.0)	(195.0)
Net Benefit Plan Adjustments, Beginning balance	5.4	3.1
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax	0.5	0.4
Tax effect of adjustments	(0.1)	(0.1)
Net Benefit Plan Adjustments, Ending balance	5.8	3.4
Accumulated Other Comprehensive Earnings, Beginning balance	(27.6)	(261.6)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(35.5)	70.1
Provision for income tax related to items of comprehensive earnings	(0.1)	(0.1)
Accumulated Other Comprehensive Earnings, Ending balance	$ (63.2)	$ (191.6)

FAIR VALUE MEASUREMENTS AND DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

3 Months Ended

Mar. 31, 2026

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS AND DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

The Company’s population of financial assets and liabilities subject to fair value measurements were as follows:


				Fair Value Measurements
	Condensed Consolidated Balance Sheets Classification			March 31, 2026
		Fair Value at		Using Fair Value Hierarchy
		March 31, 2026		Level 1		Level 2		Level 3
Noncontrolling interest put	Noncontrolling interest	$	16.9	$	—	$	16.9	$	—
Cross currency swaps	Other liabilities	$	268.8	$	—	$	268.8	$	—
Interest rate swaps	Other liabilities	$	53.8	$	—	$	53.8	$	—


Cash surrender value of life insurance policies	Other assets, net	$	102.3	$	—	$	102.3	$	—
Deferred compensation asset	Other assets, net	$	56.5	$	—	$	56.5	$	—
Deferred compensation liability	Other liabilities	$	153.5	$	—	$	153.5	$	—

Contingent consideration	Accrued expenses and other/Other liabilities	$	139.8	$	—	$	—	$	139.8


				Fair Value Measurements
	Condensed Consolidated Balance Sheets Classification			December 31, 2025
		Fair Value at		Using Fair Value Hierarchy
		December 31, 2025		Level 1		Level 2		Level 3
Noncontrolling interest put	Noncontrolling interest	$	16.9	$	—	$	16.9	$	—
Cross currency swaps	Other liabilities	$	274.0	$	—	$	274.0	$	—
Interest rate swaps	Other liabilities	$	52.7	$	—	$	52.7	$	—
Cash surrender value of life insurance policies	Other assets, net	$	99.6	$	—	$	99.6	$	—
Deferred compensation asset	Other assets, net	$	53.1	$	—	$	53.1	$	—
Deferred compensation liability	Other liabilities	$	150.5	$	—	$	150.5	$	—

Contingent consideration	Accrued expenses and other/Other liabilities	$	50.0	$	—	$	—	$	50.0


Fair Value Measurement of Level 3 Liabilities:	Contingent Consideration
Balance at December 31, 2025	$	50.0


Additions from business acquisitions	89.8
Balance at March 31, 2026	$	139.8	(1)

(1)At March 31, 2026, $75.5 and $64.3 of contingent consideration is included within Accrued expenses and other and Other liabilities, respectively, in the Company’s Condensed Consolidated Balance Sheets.

The Company has a noncontrolling interest put option related to its Ontario subsidiary that has been classified as mezzanine equity in the Company’s Condensed Consolidated Balance Sheets. The noncontrolling interest put is valued at its contractually determined value, which approximates fair value.

The fair values of derivative financial instruments have been determined based on market value equivalents at the balance sheet date, taking into account the current interest rate environment and therefore were classified as Level 2 measurements in the fair value hierarchy.

The Company offers certain employees the opportunity to participate in an employee-funded DCP. A participant’s deferrals are allocated by the participant to one or more of multiple measurement funds, which are indexed to externally managed funds. From time to time, to offset the cost of the growth in the participant’s investment accounts, the Company purchases life insurance policies, with the Company named as beneficiary of the policies. Changes in the cash surrender value of the life insurance policies are based upon earnings and changes in the value of the underlying investments, which are typically invested in a similar manner to the participant’s allocations. Changes in the fair value of the DCP obligation are derived using quoted prices in active markets based on the market price per unit multiplied by the number of units. The cash surrender value and the DCP obligations are classified within Level 2 because their inputs are derived principally from observable market data by correlation to the hypothetical investments.

The Company measured the fair value of contingent consideration liabilities as Level 3 instruments. These contingent consideration liabilities were recorded at fair value on the acquisition date and are remeasured quarterly based on the then assessed fair value and adjusted, if necessary. The increases or decreases in the fair value of contingent consideration payable can result from changes in anticipated revenue levels and changes in assumed discount periods and rates. As the fair value measure is based on significant inputs that are not observable in the market, they are categorized as Level 3.

The carrying amounts of cash and cash equivalents, accounts receivable, and accounts payable are considered to be representative of their respective fair values due to their short-term nature. Although recorded at amortized cost on the Company’s Condensed Consolidated Balance Sheets, the fair market value of the Company’s senior notes was $4,915.9 and $4,963.6 at March 31, 2026, and December 31, 2025, respectively. At March 31, 2026, the carrying value of the Company’s 2026 Term Loan, also recorded at amortized cost, was estimated to approximate fair value primarily due to its variable interest rate. The Company’s senior notes and 2026 Term Loan are considered Level 2 instruments, as the fair market values of these instruments are based on observable market pricing/inputs.

Interest Rate Swaps

The Company is party to fixed-to-variable interest rate swap agreements for its 2.70% senior notes due 2031 with an aggregate notional amount of $500.0 and variable interest rates currently based on the compounded SOFR, plus 1.33%.

Interest rate swap agreements, which have been used by the Company from time to time in the management of interest rate

exposure, are accounted for at fair value. These derivative financial instruments are accounted for as fair value hedges that increase or decrease the value of the Company’s senior notes with the offset being recorded as a component of other long-term assets or liabilities, as applicable. As the specific terms and notional amounts of the derivative financial instruments match those of the fixed-rate debt being hedged, the derivative instruments are assumed to be perfectly effective hedges and accordingly, there is no impact to the Company’s Condensed Consolidated Statements of Operations.

Cross Currency Swaps

The Company is party to various USD to Swiss Franc cross-currency swap agreements with an aggregate notional amount of $1,200.0, with $300.0 maturing in 2029, $300.0 maturing in 2031, and $600.0 maturing in 2034.

The above instruments are designated as a hedge against the impact of foreign exchange movements on its net investment in a Swiss subsidiary. Changes in the fair value of the cross-currency swaps are charged or credited through Accumulated other comprehensive loss in the Condensed Consolidated Balance Sheet until the hedged item is recognized in earnings. The cumulative amount of the fair value hedging adjustments is recognized as currency translation within the Condensed Consolidated Statement of Comprehensive Earnings.

The table below provides information regarding the location and amount of pretax gains of derivatives designated in fair value hedging relationships:


		Amounts included in other comprehensive loss
	Three Months Ended March 31,
		2026		2025

Cross currency swaps		$	5.2	$	7.0

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 107
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-107

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 100
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-100

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 940
-SubTopic 820
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478119/940-820-50-1

+ Details

Cover Page - shares shares in Millions	3 Months Ended
Cover Page - shares shares in Millions	Mar. 31, 2026	May 01, 2026
Document Information [Table]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2026
Document Transition Report	false
Entity File Number	1-11353
Entity Registrant Name	LABCORP HOLDINGS INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	99-2588107
Entity Address, Address Line One	358 South Main Street
Entity Address, City or Town	Burlington
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	27215
City Area Code	336
Local Phone Number	229-1127
Title of 12(b) Security	Common Stock, $0.10 par value
Trading Symbol	LH
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		82.0
Entity Central Index Key	0000920148
Amendment Flag	false
Document Fiscal Year Focus	2026
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q1

BUSINESS SEGMENT INFORMATION (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Segment Reporting [Line Items]
Revenues	$ 3,537.6	$ 3,345.1
Operating income	380.8	326.0
Intangible Asset, Finite-Lived, Amortization Expense	(75.6)	(69.6)
Net Restructuring Charges	(6.4)	(6.4)
Intangible Asset, Including Goodwill, Impairment Loss	0.0	0.0
Interest expense	(55.1)	(56.0)
Investment income	12.2	6.5
Equity method loss, net	(5.1)	(0.3)
Other, net	(13.1)	(1.0)
Earnings before income taxes	319.7	275.2
Operating Segments
Segment Reporting [Line Items]
Operating income	579.4	534.4
Intersegment Eliminations
Segment Reporting [Line Items]
Revenues	5.1	5.8
Diagnostics
Segment Reporting [Line Items]
Labor and Related Expense	1,188.1	1,123.6
Supplies Expense	613.5	586.6
Other Cost and Expense, Operating	438.0	430.2
Diagnostics \| Operating Segments
Segment Reporting [Line Items]
Revenues	2,762.1	2,629.6
Depreciation	63.8	61.7
Operating income	458.7	427.5
Biopharma Laboratory Services
Segment Reporting [Line Items]
Labor and Related Expense	309.3	289.7
Supplies Expense	121.5	111.1
Freight	110.8	95.0
Other Cost and Expense, Operating	89.7	90.0
Biopharma Laboratory Services \| Operating Segments
Segment Reporting [Line Items]
Revenues	780.6	721.3
Depreciation	28.6	28.6
Operating income	120.7	106.9
Corporate Segment [Member]
Segment Reporting [Line Items]
Operating income	$ (116.6)	$ (132.4)

Insider Trading Arrangements

3 Months Ended

Mar. 31, 2026

Trading Arrangements, by Individual

Material Terms of Trading Arrangement

Insider Adoption or Termination of Trading Arrangements:

During the quarter ended March 31, 2026, none of the Company’s directors or officers informed it of the adoption, modification or termination of a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as those terms are defined in Regulation S-K, Item 408, except as described in the table below:

Name and Title

Date Adopted

Character of Trading Agreement

Aggregate Number of Shares of Common Stock to be (Sold) Purchased Pursuant to Trading Agreement

Expiration Date

Kathryn W. Kyle

March 9, 2026

Rule 10b5-1 Trading Arrangement

(1,633)

(1)(2)

April 9, 2027

(3)

Executive Vice President, Chief Legal Officer and Corporate Secretary

Bryan T. Vaughn

March 8, 2026

Rule 10b5-1 Trading Arrangement

(2,813)

(1)

May 7, 2027

(3)

Executive Vice President, Diagnostics

(1)The figure presented represents the shares to be sold on the vesting of equity awards and may vary subject to the achievement of certain performance conditions and/or shares to be withheld for tax purposes.

(2)Ms. Kyle’s plan provides for the sale of up to 195 shares of Common Stock previously acquired from an equity award vesting event.

(3)This trading arrangement permits transactions through the completion of all sales on the respective order entry date.

Non-Rule 10b5-1 Arrangement Adopted

false

Rule 10b5-1 Arrangement Terminated

false

Non-Rule 10b5-1 Arrangement Terminated

false

Kathryn W. Kyle [Member]

Trading Arrangements, by Individual

Name

Kathryn W. Kyle

Title

Executive Vice President, Chief Legal Officer and Corporate Secretary

Rule 10b5-1 Arrangement Adopted

true

March 9, 2026

April 9, 2027

396 days

(1,633)

Bryan T. Vaughn [Member]

Trading Arrangements, by Individual

Name

Bryan T. Vaughn

Title

Executive Vice President, Diagnostics

Rule 10b5-1 Arrangement Adopted

true

March 8, 2026

May 7, 2027

423 days

(2,813)

Kathryn W. Kyle, Trading Arrangement, Stock Options [Member] | Kathryn W. Kyle [Member]

Trading Arrangements, by Individual

Aggregate Available

195

BUSINESS ACQUISITIONS (Tables)

3 Months Ended

Mar. 31, 2026

Business Combination [Abstract]

Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block]

The purchase price allocations for these acquisitions were preliminary at March 31, 2026. The valuation of acquired assets and assumed liabilities included the following:


	Empire City Laboratories, Inc.		Other Acquisitions Closed During the Three Months Ended March 31, 2026		Measurement Period Adjustments		Amounts Acquired During the Three Months Ended March 31, 2026





Property, plant, and equipment	$	—	$	2.4	$	—	$	2.4

Goodwill	117.5		29.1		29.3		175.9
Intangible assets	132.5		32.9		(29.3)		136.1

Total assets acquired	250.0		64.4		—		314.4





Other liabilities	—		2.4		—		2.4
Total liabilities acquired	—		2.4		—		2.4
Net assets acquired	250.0		62.0		—		312.0
Contingent consideration	(85.0)		(4.8)		—		(89.8)
2025 escrow payment	—		(20.0)		—		(20.0)
Cash paid for acquisitions	$	165.0	$	37.2	$	—	$	202.2

Intangible Asset, Finite-Lived, Acquired


	Amount		Weighted-average Amortization Period (in Years)
Customer relationships	$	137.3	15.0
Non-compete agreements	28.1		5.0


Total	$	165.4

Business Combination, Pro Forma Information [Table Text Block]


	Three Months Ended March 31,
		2026		2025
Revenues		$	3,596.7	$	3,410.2
Net earnings attributable to LHI		$	286.7	$	222.6

DEBT (Credit Facilities) (Details) - USD ($) $ in Millions	3 Months Ended
DEBT (Credit Facilities) (Details) - USD ($) $ in Millions	Mar. 31, 2026	Mar. 31, 2025	Mar. 20, 2026	Jan. 28, 2026	Dec. 31, 2025	Jan. 31, 2025	Aug. 23, 2024
Line of Credit Facility [Line Items]
Revolving Credit Facility, maximum borrowing capacity						$ 700.0
Credit Facility Option to Increase	$ 500.0
Credit Facility, Maximum Swing Line Borrowings	$ 100.0
Line of Credit Facility, Commitment Fee Description	0.070% to 0.200%
Letters of Credit Outstanding, Amount	$ 107.4
Line of Credit Facility, Current Borrowing Capacity						$ 300.0
Proceeds from accounts receivable securitization	0.0	$ 225.0
2026 Term Loan	750.0		$ 750.0		$ 0.0
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Revolving Credit Facility, maximum borrowing capacity	1,000.0
Credit Facility, Maximum Letters of Credit	150.0
Revolving Credit Facility, amount outstanding	$ 0.0
Line of Credit Facility, Interest Rate at Period End	4.67%
Revolving Credit Facility [Member] \| Minimum [Member] \| Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.805%
Revolving Credit Facility [Member] \| Minimum [Member] \| Base Rate
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.00%
Revolving Credit Facility [Member] \| Maximum [Member] \| Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.30%
Revolving Credit Facility [Member] \| Maximum [Member] \| Base Rate
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.30%
Accounts receivable securitizaiton
Line of Credit Facility [Line Items]
Revolving Credit Facility, maximum borrowing capacity				$ 825.0			$ 700.0
Line of Credit Facility, Current Borrowing Capacity				$ 700.0			$ 300.0
2026 Term Loan
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate, Effective Percentage	4.39%
Debt Instrument, Interest Rate, Effective Percentage	4.39%
2026 Term Loan \| Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.70%
2026 Term Loan \| Base Rate
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.00%

COMMITMENTS AND CONTINGENCIES (Details) - USD ($)	Jan. 23, 2025	May 12, 2023	Sep. 22, 2022	Mar. 31, 2026
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value			$ 817,000,000.0
Unrecorded Unconditional Purchase Obligation, Including Lease Not yet Commenced, Total				$ 122,300,000
Unrecorded Unconditional Purchase Obligation, Including Lease Not yet Commenced, to be Paid, Year One				27,800,000
Unrecorded Unconditional Purchase Obligation, Including Lease Not yet Commenced, to be Paid, Year Two				20,500,000
Unrecorded Unconditional Purchase Obligation, Including Lease Not yet Commenced, to be Paid, Year Three				$ 74,000,000.0
Initial Damages
Loss Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value			$ 272,000,000.0
Enhanced Damages
Loss Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value		$ 100,000,000.0
Royalty Damages [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value	$ 100
Supplemental Damages [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value	$ 2,600,000

BASIS OF FINANCIAL STATEMENT PRESENTATION (Policies)	3 Months Ended
BASIS OF FINANCIAL STATEMENT PRESENTATION (Policies)	Mar. 31, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Accounting, Policy	The accompanying Condensed Consolidated Financial Statements of the Company are unaudited. In the opinion of management, all adjustments necessary for a fair statement of results of operations, cash flows, and financial position have been made. Except as otherwise disclosed, all such adjustments are of a normal recurring nature. Interim results are not necessarily indicative of results for a full year. The balance sheet for the year ended December 31, 2025 presented herein, was derived from the Company’s annual audited Consolidated Financial Statements but does not include all disclosures required by GAAP, which are contained within the Annual Report. These unaudited Condensed Consolidated Financial Statements and notes are presented in accordance with the rules and regulations of the SEC and GAAP for interim reporting. As such, certain notes or other information that are normally required by the SEC or GAAP have been omitted if they substantially duplicate the disclosures contained in the Company’s annual audited Consolidated Financial Statements contained within its Annual Report. Accordingly, these Condensed Consolidated Financial Statements and notes should be read in conjunction with the Consolidated Financial Statements and notes thereto contained in the Company’s Annual Report.
Consolidation, Subsidiaries or Other Investments, Consolidated Entities, Policy	These Condensed Consolidated Financial Statements include the accounts of the Company and its majority-owned subsidiaries for which it exercises control. Long-term investments in affiliated companies in which the Company exercises significant influence, but which it does not control, are accounted for using the equity method. The Company also has investments in other companies or investment funds that develop technology relating to the Company’s operations. Investments in which the Company does not exercise significant influence (generally, when the Company has an investment of less than 20% and no representation on the investee’s board of directors) are accounted for at fair value, or at cost minus impairment adjusted for observable price changes in orderly transactions for an identical or similar investment of the same issuer for those investments that do not have readily determinable fair values. The carrying value of these type of investments was $201.6 and $201.9 at March 31, 2026 and December 31, 2025, respectively, and is included within Other assets, net in the Company’s Condensed Consolidated Balance Sheets. All significant intercompany transactions and accounts have been eliminated. The Company does not have any significant variable interest entities or special purpose entities whose financial results are not included in these Condensed Consolidated Financial Statements.
Foreign Currency Transactions and Translations, Policy	The financial statements of the Company’s operating foreign subsidiaries are measured using the local currency as the functional currency. Assets and liabilities are translated at exchange rates as of the balance sheet date. Revenues and expenses are translated at average monthly exchange rates prevailing during the period. Resulting translation adjustments are included in Accumulated other comprehensive loss within the Condensed Consolidated Balance Sheets.
New Accounting Pronouncements, Policy	Recent Accounting Pronouncements In July 2025, the FASB issued ASU 2025-05, Financial Instruments — Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets. This accounting pronouncement provides all entities with a practical expedient to assume that current conditions as of the balance sheet date do not change for the remaining life of the assets when measuring credit losses. ASU 2025-05 is effective for fiscal years beginning after December 15, 2025. This accounting pronouncement did not have a material impact on the Company’s Condensed Consolidated Financial Statements. In September 2025, the FASB issued ASU 2025-06, Intangibles — Goodwill and Other — Internal-Use-Software (Topic 350): Targeted Improvements to the Accounting for Internal-Use Software. This accounting pronouncement improves the operability of the existing guidance by removing all references to software development project stages so that the guidance is neutral to different software development methods. ASU 2025-06 is effective for fiscal years beginning after December 15, 2027. The Company is currently assessing the impact that adopting this accounting pronouncement will have on its Condensed Consolidated Financial Statements. In December 2025, the FASB issued ASU 2025-10, Government Grants (Topic 832): Accounting for Government Grants Received by Business Entities. This accounting pronouncement establishes guidance on the recognition, measurement, and presentation of government grants received by business entities. ASU 2025-10 is effective for fiscal years beginning after December 15, 2028. The Company is currently assessing the impact that adopting this accounting pronouncement will have on its Condensed Consolidated Financial Statements. In December 2025, the FASB issued ASU 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements. This accounting pronouncement is intended to improve the navigability of guidance in ASC 270, Interim Reporting, and clarify when it applies. ASU 2025-11 is effective for fiscal years beginning after December 15, 2027. The Company is currently assessing the impact that adopting this accounting pronouncement will have on its future interim reporting. In December 2025, the FASB issued ASU 2025-12, Codification Improvements. This accounting pronouncement addresses suggestions received from stakeholders regarding the Accounting Standards Codification and makes other incremental improvements to GAAP that clarify, correct errors in, or make other improvements to a variety of topics that are intended to make it easier to understand and apply. ASU 2025-12 is effective for fiscal years beginning after December 15, 2026. The Company is currently assessing the impact that adopting this accounting pronouncement will have on its Condensed Consolidated Financial Statements.

BASIS OF FINANCIAL STATEMENT PRESENTATION (Details) $ in Millions	3 Months Ended
	Mar. 31, 2026 USD ($) contracts	Mar. 31, 2025	Dec. 31, 2025 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of Reportable Segments \| contracts	2
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	100.00%	100.00%
Ownership percentage below which investments are generally accounted for on the cost method (in thousandths)	20.00%
Investments \| $	$ 201.6		$ 201.9
Diagnostics
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	78.00%	78.00%
Biopharma Laboratory Services
Disaggregation of Revenue [Line Items]
Percent of Revenue Contributed	22.00%	22.00%

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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-URI https://asc.fasb.org/1943274/2147479806/606-10-50-5

Reference 3: http://www.xbrl.org/2003/role/exampleRef
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-Paragraph 91
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Reference 4: http://www.xbrl.org/2003/role/exampleRef
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Reference 5: http://www.xbrl.org/2003/role/exampleRef
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Reference 6: http://www.xbrl.org/2003/role/exampleRef
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Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
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-Name Accounting Standards Codification
-Section 55
-Paragraph 91
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Reference 8: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
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-Paragraph 91
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Reference 9: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
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-Section 55
-Paragraph 91
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479777/606-10-55-91

+ Details

GOODWILL AND INTANGIBLE ASSETS

3 Months Ended

Mar. 31, 2026

Intangible Asset, Goodwill and Other [Abstract]

GOODWILL AND INTANGIBLE ASSETS

The balances, net of impairment, and changes in the carrying amount of goodwill were as follows:


	Dx		BLS		Total

Beginning Balance at December 31, 2025	$	5,434.8	$	1,354.7	$	6,789.5
Goodwill acquired, excluding measurement period adjustments	146.6		—		146.6



Foreign currency impact and other adjustments to goodwill	28.1		(9.0)		19.1
Ending Balance at March 31, 2026	$	5,609.5	$	1,345.7	$	6,955.2

During the three months ended March 31, 2026 and 2025, the Company did not record a goodwill or intangible asset impairment charge.

The cumulative goodwill impairment for the Company as of March 31, 2026, and December 31, 2025, was $648.5 and primarily represents the goodwill of the Company’s ED reporting unit within the BLS segment.

The components of identifiable intangible assets were as follows:


				March 31, 2026						December 31, 2025
	Range of Useful Lives (in Years)			Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Definite-lived intangible assets:
Customer relationships	10	-	36	$	4,615.8	$	(1,850.7)	$	2,765.1	$	4,525.3	$	(1,816.3)	$	2,709.0
Patents, licenses, and technology	3	-	15	546.8		(344.5)		202.3		548.7		(337.5)		211.2
Non-compete agreements	3	-	5	221.3		(114.7)		106.6		213.5		(108.0)		105.5
Other	1	-	15	40.1		(30.6)		9.5		40.0		(28.9)		11.1
Total definite-lived intangible assets				$	5,424.0	$	(2,340.5)	$	3,083.5	$	5,327.5	$	(2,290.7)	$	3,036.8

Indefinite-lived intangible assets:
Canadian and other licenses				$	552.6	N/A		$	552.6	$	559.2	N/A		$	559.2


Total intangible assets				$	5,976.6	$	(2,340.5)	$	3,636.1	$	5,886.7	$	(2,290.7)	$	3,596.0

Amortization of intangible assets was $75.6 and $69.6 for the three months ended March 31, 2026, and 2025, respectively. The amortization expense of intangible assets is estimated to be $223.0 for the remainder of 2026, $287.8 in 2027, $280.2 in 2028, $267.0 in 2029, $258.7 in 2030, and $1,766.8 thereafter.

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Current assets:
Cash and cash equivalents	$ 981.1	$ 532.3
Accounts receivable, net	2,288.6	2,103.8
Unbilled services, net	161.9	156.9
Supplies inventory	497.7	534.7
Prepaid expenses and other	629.5	692.8
Total current assets	4,558.8	4,020.5
Property, plant, and equipment, net	3,065.5	3,081.5
Goodwill, net	6,955.2	6,789.5
Intangible assets, net	3,636.1	3,596.0
Joint venture partnerships and equity method investments	146.6	153.9
Other assets, net	724.9	751.3
Total assets	19,087.1	18,392.7
Current liabilities:
Accounts payable	695.7	840.8
Accrued expenses and other	851.9	847.8
Unearned revenue	405.2	439.1
Short-term operating lease liabilities	183.2	191.1
Short-term finance lease liabilities	4.6	4.6
Short-term borrowings and current portion of long-term debt	500.4	500.1
Total current liabilities	2,641.0	2,823.5
Long-term debt	5,833.7	5,084.6
Operating lease liabilities	656.5	682.6
Finance lease liabilities	62.2	63.0
Deferred income taxes and other tax liabilities	456.4	454.5
Other liabilities	691.8	647.8
Total liabilities	10,341.6	9,756.0
Commitments and contingent liabilities
Noncontrolling interest	16.9	16.9
Shareholders' equity:
Common stock, 82.3 and 82.2 shares outstanding at March 31, 2026, and December 31, 2025, respectively	7.4	7.5
Additional paid-in capital	0.0	0.0
Retained earnings	(8,784.4)	(8,639.9)
Accumulated other comprehensive loss	(63.2)	(27.6)
Total shareholders’ equity	8,728.6	8,619.8
Total liabilities and shareholders’ equity	$ 19,087.1	$ 18,392.7
CommonStockSharesIssuedNotDisclosed	true	true

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Income Statement [Abstract]
Revenues	$ 3,537.6	$ 3,345.1
Cost of revenues	2,523.8	2,397.1
Gross profit	1,013.8	948.0
Selling, general, and administrative expenses	551.0	546.0
Amortization of intangibles and other assets	75.6	69.6
Restructuring and other charges	6.4	6.4
Operating income	380.8	326.0
Interest expense	(55.1)	(56.0)
Investment income	12.2	6.5
Equity method loss, net	(5.1)	(0.3)
Other, net	(13.1)	(1.0)
Earnings from operations before income taxes	319.7	275.2
Provision for income taxes	41.7	62.2
Net earnings	278.0	213.0
Less: Net earnings attributable to the noncontrolling interest	(0.2)	(0.2)
Net earnings attributable to Labcorp Holdings Inc.	$ 277.8	$ 212.8
Basic earnings per share (in dollars per share)	$ 3.37	$ 2.54
Diluted earnings per share (in dollars per share)	$ 3.35	$ 2.52

COMMITMENTS AND CONTINGENCIES	3 Months Ended
COMMITMENTS AND CONTINGENCIES	Mar. 31, 2026
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Commitments The Company has a noncancelable contract with a vendor to purchase supplies inventory pursuant to which the Company is obligated to make expected total future minimum payments of $122.3, including $27.8 for the remainder of 2026, $20.5 in 2027, and $74.0 in 2028. Legal Contingencies The Company is involved from time to time in various claims and legal actions, including arbitrations, class actions, and other litigation (including those described in more detail below), arising in the ordinary course of business. Some of these actions involve claims that are substantial in amount. These matters include, but are not limited to, intellectual property disputes, commercial and contract disputes, professional liability claims, employee-related matters, transaction-related disputes, securities and corporate law matters, and inquiries, including subpoenas and other civil investigative demands, from governmental agencies, Medicare or Medicaid payers, and MCOs reviewing billing practices or requesting comment on allegations of billing irregularities that are brought to their attention through billing audits or third parties. The Company receives civil investigative demands or other inquiries from various governmental bodies in the ordinary course of its business. Such inquiries can relate to the Company or other parties, including physicians and other health care providers. The Company works cooperatively to respond to appropriate requests for information. The Company also is named from time to time in suits brought under the qui tam provisions of the False Claims Act and comparable state laws. These suits typically allege that the Company has made false statements and/or certifications in connection with claims for payment from U.S. federal or state healthcare programs. The suits may remain under seal (hence, unknown to the Company) for some time while the government decides whether to intervene on behalf of the qui tam plaintiff. Such claims are an inevitable part of doing business in the healthcare field today. The Company believes that it is in compliance in all material respects with all statutes, regulations, and other requirements applicable to its commercial laboratory operations and drug development support services. The healthcare diagnostics and drug development industries are, however, subject to extensive regulation, and the courts have not interpreted many of the applicable statutes and regulations. Therefore, the applicable statutes and regulations could be interpreted or applied by a prosecutorial, regulatory, or judicial authority in a manner that would adversely affect the Company. Potential sanctions for violation of these statutes and regulations include significant civil and criminal penalties, fines, the loss of various licenses, certificates and authorizations, additional liabilities from third-party claims, and/or exclusion from participation in government programs. Many of the current claims and legal actions against the Company are in preliminary stages, and many of these cases seek an indeterminate amount of damages. The Company records an aggregate legal reserve, which is determined using calculations based on historical loss rates and assessment of trends experienced in settlements and defense costs. In accordance with FASB Accounting Standards Codification Topic 450, Contingencies, the Company establishes reserves for judicial, regulatory, and arbitration matters outside the aggregate legal reserve if and when those matters present loss contingencies that are both probable and reasonably estimable and would exceed the aggregate legal reserve. If the reasonable estimate of a known or probable loss is a range, and no amount within the range is a better estimate than any other, the minimum amount of the range is accrued. If a loss is reasonably possible but not known or probable, and may be reasonably estimated, the estimated loss or range of loss is disclosed. When loss contingencies are not both probable and reasonably estimable, the Company does not establish separate reserves. The Company is unable to estimate a range of reasonably possible loss for the proceedings described in more detail below in which damages either have not been specified or, in the Company’s judgment, are unsupported and/or exaggerated and (i) the proceedings are in early stages, (ii) there is uncertainty as to the outcome of pending appeals or motions, (iii) there are significant factual issues to be resolved, and/or (iv) there are novel legal issues to be presented. For these proceedings, however, the Company does not believe, based on currently available information, that the adverse outcomes are probable and reasonably estimable, and it does not believe they will have a material adverse effect on the Company’s financial statements. The Company has received various subpoenas and other civil investigative demands related to Medicaid billing. In October 2013, the Company received a Civil Investigative Demand from the State of Texas Office of the Attorney General requesting documents related to its billing to Texas Medicaid. The Company cooperated with this request. On October 5, 2018, the Company received a second Civil Investigative Demand from the State of Texas Office of the Attorney General requesting documents related to its billing to Texas Medicaid. The Company cooperated with this request. On January 26, 2021, the Company was notified that a qui tam Petition was pending under seal in the District Court, 250th Judicial District, Travis County, Texas, and that the State of Texas had intervened. On April 14, 2021, the Petition was unsealed. The Petition alleges that the Company submitted claims for reimbursement to Texas Medicaid that were higher than permitted under Texas Medicaid’s alleged “best price” regulations, and that the Company offered remuneration to Texas healthcare providers in the form of discounted pricing for certain laboratory testing services in exchange for the providers’ referral of Texas Medicaid business to the Company. The Petition seeks actual and double damages and civil penalties, as well as recovery of costs, attorney’s fees, and legal expenses. On August 1, 2022, the District Court entered an order granting the Company’s Motion for Partial Summary Judgment with respect to the claim that the Company submitted claims for reimbursement to Texas Medicaid that were higher than permitted under Texas Medicaid’s alleged “best price” regulations. Plaintiffs filed a Notice of Non-Suit and Motion for Entry of Final Judgment and, on November 11, 2022, the court entered a judgment. Plaintiffs filed a Notice of Appeal with respect to the court’s order granting the Company’s Motion for Partial Summary Judgment, referenced above. On December 31, 2024, the Texas Court of Appeals issued a decision reversing the District Court’s order granting the Company’s Motion for Partial Summary Judgment. On February 28, 2025, the Company filed in the Texas Supreme Court a Petition for Review with respect to the Texas Court of Appeals decision. On January 16, 2026, the Texas Supreme Court granted the Petition for Review, and on February 12, 2026, the Texas Supreme Court held oral argument. The Company will vigorously defend the lawsuit. On May 14, 2019, Retrieval-Masters Creditors Bureau, Inc. d/b/a AMCA, an external collection agency, notified the Company about a security incident AMCA experienced that may have involved certain personal information about some of the Company’s patients (the AMCA Incident). The Company referred patient balances to AMCA only when direct collection efforts were unsuccessful. The Company’s systems were not impacted by the AMCA Incident. Upon learning of the AMCA Incident, the Company promptly stopped sending new collection requests to AMCA and stopped AMCA from continuing to work on any pending collection requests from the Company. AMCA informed the Company that it appeared that an unauthorized user had access to AMCA’s system between August 1, 2018, and March 30, 2019, and that AMCA could not rule out the possibility that personal information on AMCA’s system was at risk during that time period. Information on AMCA’s affected system from the Company may have included name, address, and balance information for the patient and person responsible for payment, along with the patient’s phone number, date of birth, referring physician, and date of service. The Company was later informed by AMCA that health insurance information may have been included for some individuals, and because some insurance carriers utilize the Social Security Number as a subscriber identification number, the Social Security Number for some individuals may also have been affected. No ordered tests, laboratory test results, or diagnostic information from the Company were in the AMCA affected system. The Company notified individuals for whom it had a valid mailing address. For the individuals whose Social Security Number was affected, the notice included an offer to enroll in credit monitoring and identity protection services that was provided free of charge for 24 months. Twenty-three putative class action lawsuits were filed against the Company related to the AMCA Incident in various U.S. District Courts. Numerous similar lawsuits have been filed against other healthcare providers who used AMCA. These lawsuits were consolidated into a multidistrict litigation in the District of New Jersey. On November 15, 2019, the Plaintiffs filed a Consolidated Class Action Complaint in the U.S. District Court of New Jersey. The consolidated Complaint generally alleged that the Company did not adequately protect its patients’ data and failed to timely notify those patients of the AMCA Incident. The Complaint asserted various causes of action, including but not limited to negligence, breach of implied contract, unjust enrichment, and the violation of state data protection statutes. The Complaint sought damages on behalf of a class of all affected Company customers. On January 22, 2020, the Company filed Motions to Dismiss all claims. On December 16, 2021, the court granted in part and denied in part the Company’s Motion to Dismiss. On March 31, 2022, the Plaintiffs filed an Amended Complaint alleging claims for negligence, negligence per se, breach of confidence, invasion of privacy, and various state statutory claims, including a claim under the California Confidentiality of Medical Information Act. The Company filed a Motion to Dismiss certain claims of the Amended Complaint. On May 5, 2023, the court granted in part and denied in part the Company’s Motion to Dismiss. On November 1, 2024, Plaintiffs served their motion for class certification. On March 2, 2026, the parties entered into a Class Action Settlement and Release, which is subject to court approval. The Company was served with a shareholder derivative lawsuit, Raymond Eugenio, Derivatively on Behalf of Nominal Defendant, Laboratory Corporation of America Holdings v. Lance Berberian, et al., filed in the Court of Chancery of the State of Delaware on April 23, 2020. The complaint asserts derivative claims on the Company’s behalf against the Company’s board of directors and certain executive officers. The complaint generally alleges that the defendants failed to ensure that the Company utilized proper cybersecurity safeguards and failed to implement a sufficient response to data security incidents, including the AMCA Incident. The complaint asserts derivative claims for breach of fiduciary duty and seeks relief including damages, certain disclosures, and certain changes to the Company’s internal governance practices. On June 2, 2020, the Company filed a Motion to Stay the lawsuit due to its overlap with the multi-district litigation referenced above. On July 2, 2020, the Company filed a Motion to Dismiss. On July 14, 2020, the court entered an order staying the lawsuit pending the resolution of the multi-district litigation. The Company will vigorously defend the lawsuit. Certain governmental entities have requested information from the Company related to the AMCA Incident. The Company received a request for information from the OCR of the Department of Health and Human Services. On April 28, 2020, OCR notified the Company of the closure of its inquiry. The Company has also received requests from a multi-state group of state Attorneys General and is cooperating with these requests for information. On January 31, 2020, the Company was served with a putative class action lawsuit, Luke Davis and Julian Vargas, et al. v. Laboratory Corporation of America Holdings, filed in the U.S. District Court for the Central District of California. The lawsuit alleges that visually impaired patients are unable to use the Company’s touchscreen kiosks at Company PSCs in violation of the Americans with Disabilities Act and similar California statutes. The lawsuit seeks statutory damages, injunctive relief, and attorney’s fees and costs. On March 20, 2020, the Company filed a Motion to Dismiss Plaintiffs’ Complaint and to Strike Class Allegations. In August 2020, the Plaintiffs filed an Amended Complaint. On April 26, 2021, the Plaintiffs and the Company each filed Motions for Summary Judgment and the Plaintiffs filed a Motion for Class Certification. On May 23, 2022, the court entered an order granting Plaintiffs’ Motion for Class Certification. On June 6, 2022, the Company filed a Petition for Permission to Appeal the Order Granting Class Certification with the U.S. Court of Appeals for the Ninth Circuit. On September 22, 2022, the Ninth Circuit granted the Company’s Petition for Permission to Appeal the Order Granting Class Certification. On February 8, 2024, the Ninth Circuit affirmed the trial court’s decision to certify both a California damages class and a nationwide injunctive class. On March 25, 2024, the Company filed a Petition for Rehearing En Banc with the Ninth Circuit. On April 18, 2024, the Ninth Circuit denied the Petition for Rehearing En Banc. On September 13, 2024, the Company filed a Petition for Writ of Certiorari with the U.S. Supreme Court, which was granted on January 24, 2025, and then dismissed on June 5, 2025. In March 2026, the parties filed cross Motions for Summary Judgment. The Company will vigorously defend the lawsuit. On October 16, 2020, Ravgen Inc. filed a patent infringement lawsuit, Ravgen Inc. v. Laboratory Corporation of America Holdings, in the U.S. District Court for the Western District of Texas, alleging infringement of two Ravgen-owned U.S. patents. The lawsuit sought monetary damages, enhancement of those damages for willfulness, and recovery of attorney’s fees and costs. On September 28, 2022, a jury rendered a verdict in favor of the Plaintiff on the sole asserted patent finding that the Company willfully infringed Ravgen’s patent, and awarded damages of $272.0. Plaintiff filed post-trial motions seeking enhanced damages of up to $817.0 based on the finding of willfulness, as well as attorney’s fees and costs. On May 12, 2023, the court issued an order granting Plaintiff’s motion in part and awarding enhanced damages of $100.0. On January 23, 2025, the court issued an order awarding Plaintiff post-verdict supplemental damages of $2.6, an ongoing royalty of one hundred dollars and 00/100 cents per test through the life of the patent at issue, pre- and post-judgment interest, and other relief. In January and February 2025, the trial court entered orders denying the Company’s post-trial motions and the Company has filed an appeal. On March 18, 2025, the Company filed an appeal bond with the Court to stay enforcement of the judgment pending appeal. The Company strongly disagrees with the verdict, based on a number of legal factors, and will vigorously defend the lawsuit through the appeal process. On June 7, 2023, the Company was served with a putative class action lawsuit, Connie Howard, Yadira Yazmin Hernandez, and Deborah Reynolds, et al. v. Laboratory Corporation of America, Laboratory Corporation of America Holdings, and Meta Platforms, Inc., filed in the U.S. District Court for the Northern District of California, alleging that the Company’s website includes a tracking code created by Meta, known as the Meta Pixel, that sent information related to Plaintiffs and their online activities to Meta. Plaintiffs assert claims against the Company under California and Pennsylvania law and seek to represent classes of all persons in California, or in Pennsylvania, who allegedly entered search terms into the Company’s website and who used Facebook during a time that Plaintiffs allege the Meta Pixel was active on the Company’s website. Plaintiffs seek an injunction, damages, attorneys’ fees, and costs. On August 23, 2023, the Company filed a Motion to Dismiss. On September 5, 2023, the lawsuit was transferred to the U.S. District Court for the Middle District of North Carolina. On September 9, 2023, Plaintiffs filed an Amended Complaint. Among other things, the Amended Complaint contains allegations that in addition to the Meta Pixel, the Company’s website uses Google Analytics and other online tracking technologies. On October 11, 2023, the Company filed a Motion to Dismiss the Amended Complaint. On April 2, 2026, the parties entered into a Class Action Settlement and Release, which is subject to court approval. On June 27, 2022, the Company was served with a Subpoena Duces Tecum issued by the DOJ in Boston, Massachusetts requiring the production of documents related to urine drug testing. The Company is cooperating with the DOJ. There are various other pending legal proceedings involving the Company including, but not limited to, additional employment-related lawsuits, professional liability lawsuits, and commercial lawsuits. While it is not feasible to predict the outcome of such proceedings, in the opinion of the Company, the likelihood of loss is remote and any reasonably possible loss associated with the resolution of such proceedings is not expected to be material to the Company’s financial condition, results of operations, or cash flows, either individually or in the aggregate. Under the Company’s present insurance programs, coverage is obtained for catastrophic exposure as well as those risks required to be insured by law or contract. The Company is responsible for the uninsured portion of losses related primarily to general, professional and vehicle liability, certain medical costs and workers’ compensation. The self-insured retentions are on a per-occurrence basis without any aggregate annual limit. Provisions for losses expected under these programs are recorded based upon the Company’s estimates of the aggregated liability of claims incurred.

DEBT

3 Months Ended

Mar. 31, 2026

Debt Disclosure [Abstract]

DEBT

Short-term borrowings and the current portion of long-term debt consisted of the following:


	March 31, 2026		December 31, 2025
1.55% senior notes due 2026	$	500.0	$	500.0



Debt issuance costs	—		(0.2)
Current portion of note payable	0.4		0.3
Total Short-term borrowings and current portion of long-term debt	$	500.4	$	500.1

Long-term debt consisted of the following:


	March 31, 2026		December 31, 2025










2026 Term Loan	$	750.0	$	—
3.60% senior notes due 2027	600.0		600.0
2.95% senior notes due 2029	650.0		650.0
4.35% senior notes due 2030	650.0		650.0
2.70% senior notes due 2031	446.2		447.3
4.55% senior notes due 2032	500.0		500.0
4.80% senior notes due 2034	850.0		850.0
4.70% senior notes due 2045	900.0		900.0
Debt issuance costs	(37.5)		(37.7)
AR Facility	525.0		525.0

Total Long-term debt	$	5,833.7	$	5,084.6

Credit Facilities

On March 20, 2026, the Company entered into the $750.0 2026 Term Loan that will mature on March 20, 2028, and anticipates using the proceeds to repay maturing short-term debt and for other corporate uses. The principal balance of the 2026 Term Loan bears interest at a floating per annum rate equal to, at the Company’s election, either (i) a SOFR-based rate plus a margin of 0.700% or (ii) a base rate plus a margin of 0.0%. As of March 31, 2026, the effective interest rate on the 2026 Term Loan was 4.39%.

The Company maintains a senior revolving credit facility, which was amended and restated on June 27, 2025. It consists of a five-year revolving facility in the principal amount of up to $1,000.0, with the option of increasing the facility by up to an additional $500.0, subject to certain conditions, including obtaining additional commitments from new or existing lenders. The revolving credit facility also provides for a subfacility of up to $100.0 for swing line borrowings and a subfacility of up to $150.0 for issuances of letters of credit. Borrowings under the revolving credit facility bear interest at a floating rate equal to either (i) a SOFR-based rate plus a margin ranging from 0.805% to 1.300% or (ii) a base rate plus a margin ranging from 0.0% to 0.300%, in each case depending on the Company’s long-term debt ratings. The Company is required to pay a facility fee

quarterly on the aggregate amount of commitments under the revolving credit facility, at a per annum rate ranging from 0.070% to 0.200%, depending on the Company’s long-term debt ratings, regardless of usage. The revolving credit facility is permitted to be used for general corporate purposes, including working capital, capital expenditures, funding of share repurchases and certain other payments, acquisitions, and other investments. At March 31, 2026, there were no balances outstanding on the Company’s current revolving credit facility and $107.4 in outstanding letters of credit on the Company’s subfacility. At March 31, 2026, the effective interest rate on the revolving credit facility was 4.67%. The revolving credit facility expires in June 2030.

On August 23, 2024, the Company and a SPV entered into a $300.0 three-year accounts receivable securitization facility with PNC Bank, National Association (PNC) as administrative agent. The AR Facility provides for purchases of accounts receivable by PNC in an amount of up to $300.0 through August 2027, and may increase up to $700.0, subject to the satisfaction of certain conditions.

On January 31, 2025, the Company amended its AR Facility. The amended AR Facility increased the amount the Company can borrow from $300.0 to $700.0 through August of 2027. On January 28, 2026, the Company further amended its AR Facility. Among other things, this amendment extended the scheduled termination date to January 26, 2029, and permits the Company at its option to increase the facility limit from $700.0 to $825.0 at any time on or before May 29, 2026.

The SPV is a variable interest entity for which the Company is the primary beneficiary. The SPV’s sole business consists of the continuous purchase of receivables from the Company which is used as collateral for the loan. Although the SPV is included in the Company’s Condensed Consolidated Financial Statements, it is a separate legal entity with separate creditors.

Upon the transfer of ownership and control of the receivables to the SPV, the Company has no retained interests in the receivables sold and they become unavailable to the Company’s creditors should the relevant seller become insolvent. The Company has collection and administrative responsibilities for the receivables sold to the SPV.

The Company received no loan proceeds under the AR Facility during the three months ended March 31, 2026. During the three months ended March 31, 2025, the Company received loan proceeds of $225.0 under the AR Facility, which are included in cash from financing activities in the Condensed Consolidated Statement of Cash Flows.

Under the Company’s 2026 Term Loan, revolving credit facility, indentures relating to the Company’s senior notes, and AR Facility, the Company is subject to negative covenants limiting subsidiary indebtedness and certain other covenants typical for investment grade-rated borrowers, and with respect to the 2026 Term Loan and revolving credit facility, the Company is required to maintain certain leverage ratios. The Company was in compliance with all such covenants and leverage ratios at March 31, 2026, and expects that it will remain in compliance with its existing covenants and leverage ratios for the next 12 months.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

REVENUES (Tables)

3 Months Ended

Mar. 31, 2026

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue [Table Text Block]

The Company’s Revenues by segment and by payer group were as follows:


	Three Months Ended March 31, 2026								Three Months Ended March 31, 2025
	North America		Europe		Other		Total		North America		Europe		Other		Total
Dx:
Clients	23	%	—	%	—	%	23	%	24	%	—	%	—	%	24	%
Patients	10	%	—	%	—	%	10	%	10	%	—	%	—	%	10	%
Medicare and Medicaid	8	%	—	%	—	%	8	%	8	%	—	%	—	%	8	%
Third party	37	%	—	%	—	%	37	%	36	%	—	%	—	%	36	%
Total Dx revenues	78	%	—	%	—	%	78	%	78	%	—	%	—	%	78	%

BLS:




Pharmaceutical, biotechnology, medical device, diagnostic companies, and CROs	8	%	10	%	4	%	22	%	9	%	9	%	4	%	22	%

Total Revenues	86	%	10	%	4	%	100	%	87	%	9	%	4	%	100	%

Contract with Customer, Asset and Liability [Table Text Block]

The following table provides information about accounts receivable and unbilled services from contracts with customers:


	March 31, 2026		December 31, 2025
Dx accounts receivable	$	1,513.2	$	1,349.0
BLS accounts receivable	808.4		791.2
Less: BLS allowance for credit losses	(33.0)		(36.4)
Accounts receivable, net	$	2,288.6	$	2,103.8

Gross unbilled services	$	166.2	$	164.0
Less: BLS allowance for credit losses	(4.3)		(7.1)
Unbilled services, net	$	161.9	$	156.9

Financing Receivable, Allowance for Credit Loss [Table Text Block]

The rollforward for the allowance for credit losses was as follows:


	Accounts Receivable, net		Unbilled Services, net		Total
Allowance for credit losses at December 31, 2025	$	36.4	$	7.1	$	43.5
Credit loss expense	(0.1)		—		(0.1)
Write-offs	(3.0)		(2.8)		(5.8)
Foreign currency impact	(0.3)		—		(0.3)
Allowance for credit losses at March 31, 2026	$	33.0	$	4.3	$	37.3

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details

GOODWILL AND INTANGIBLE ASSETS (Components of identifiable intangible assets) (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Intangible Asset, Finite-Lived [Line Items]
Intangible Asset, Finite-Lived, before Accumulated Amortization	$ 5,424.0	$ 5,327.5
Intangible Asset, Finite-Lived, Accumulated Amortization	(2,340.5)	(2,290.7)
Intangible Asset, Finite-Lived, after Accumulated Amortization	3,083.5	3,036.8
Intangible Asset, Excluding Goodwill, before Accumulated Amortization	5,976.6	5,886.7
Intangible assets, net	3,636.1	3,596.0
Customer Relationships [Member]
Intangible Asset, Finite-Lived [Line Items]
Intangible Asset, Finite-Lived, before Accumulated Amortization	4,615.8	4,525.3
Intangible Asset, Finite-Lived, Accumulated Amortization	(1,850.7)	(1,816.3)
Intangible Asset, Finite-Lived, after Accumulated Amortization	2,765.1	2,709.0
Patents, Licenses And Technology [Member]
Intangible Asset, Finite-Lived [Line Items]
Intangible Asset, Finite-Lived, before Accumulated Amortization	546.8	548.7
Intangible Asset, Finite-Lived, Accumulated Amortization	(344.5)	(337.5)
Intangible Asset, Finite-Lived, after Accumulated Amortization	202.3	211.2
Noncompete Agreements [Member]
Intangible Asset, Finite-Lived [Line Items]
Intangible Asset, Finite-Lived, before Accumulated Amortization	221.3	213.5
Intangible Asset, Finite-Lived, Accumulated Amortization	(114.7)	(108.0)
Intangible Asset, Finite-Lived, after Accumulated Amortization	106.6	105.5
Other Intangible Assets
Intangible Asset, Finite-Lived [Line Items]
Intangible Asset, Finite-Lived, before Accumulated Amortization	40.1	40.0
Intangible Asset, Finite-Lived, Accumulated Amortization	(30.6)	(28.9)
Intangible Asset, Finite-Lived, after Accumulated Amortization	9.5	11.1
Canadian and other licenses [Member]
Intangible Asset, Finite-Lived [Line Items]
Intangible Asset, Excluding Goodwill, Indefinite-Lived	$ 552.6	$ 559.2
Customer Relationships [Member] \| Minimum [Member]
Intangible Asset, Finite-Lived [Line Items]
Intangible Asset, Finite-Lived, Useful Life	10 years
Customer Relationships [Member] \| Maximum [Member]
Intangible Asset, Finite-Lived [Line Items]
Intangible Asset, Finite-Lived, Useful Life	36 years
Patents, Licenses And Technology [Member] \| Minimum [Member]
Intangible Asset, Finite-Lived [Line Items]
Intangible Asset, Finite-Lived, Useful Life	3 years
Patents, Licenses And Technology [Member] \| Maximum [Member]
Intangible Asset, Finite-Lived [Line Items]
Intangible Asset, Finite-Lived, Useful Life	15 years
Noncompete Agreements [Member] \| Minimum [Member]
Intangible Asset, Finite-Lived [Line Items]
Intangible Asset, Finite-Lived, Useful Life	3 years
Noncompete Agreements [Member] \| Maximum [Member]
Intangible Asset, Finite-Lived [Line Items]
Intangible Asset, Finite-Lived, Useful Life	5 years
Other Intangible Assets \| Minimum [Member]
Intangible Asset, Finite-Lived [Line Items]
Intangible Asset, Finite-Lived, Useful Life	1 year
Other Intangible Assets \| Maximum [Member]
Intangible Asset, Finite-Lived [Line Items]
Intangible Asset, Finite-Lived, Useful Life	15 years

BUSINESS ACQUISITIONS (Details) - USD ($) $ in Millions	3 Months Ended
BUSINESS ACQUISITIONS (Details) - USD ($) $ in Millions	Mar. 31, 2026	Mar. 31, 2025
Business Combination [Abstract]
Business Combination, Consideration Transferred	$ 312.0
Business Combination [Line Items]
Business Combination, Consideration Transferred, Liabilities Incurred	(89.8)	$ (24.0)
Intangible Asset, Finite-Lived, Acquired	165.4
Payments to Acquire Businesses, Net of Cash Acquired	202.2	53.5
Business Combination, Pro Forma Information [Line Items]
Business Combination, Pro Forma Information, Pro Forma Revenue	3,596.7	3,410.2
Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax	286.7	$ 222.6
Customer Relationships [Member]
Business Combination [Line Items]
Intangible Asset, Finite-Lived, Acquired	$ 137.3
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	15 years
Noncompete Agreements [Member]
Business Combination [Line Items]
Intangible Asset, Finite-Lived, Acquired	$ 28.1
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years
Empire City Laboratories, Inc.
Business Combination [Line Items]
Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment, Equipment	$ 0.0
Business Combination, Goodwill, Expected Tax Deductible, Amount	117.5
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill	132.5
Business Combination, Recognized Asset Acquired, Asset	250.0
Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent	0.0
Business Combination, Recognized Liability Assumed, Liability	0.0
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less)	250.0
Business Combination, Consideration Transferred, Liabilities Incurred	(85.0)
Escrow Deposit	0.0
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill	165.0
Other acquirees
Business Combination [Line Items]
Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment, Equipment	2.4
Business Combination, Goodwill, Expected Tax Deductible, Amount	29.1
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill	32.9
Business Combination, Recognized Asset Acquired, Asset	64.4
Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent	2.4
Business Combination, Recognized Liability Assumed, Liability	2.4
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less)	62.0
Business Combination, Consideration Transferred, Liabilities Incurred	(4.8)
Escrow Deposit	(20.0)
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill	37.2
Measurement Period Adjustments
Business Combination [Line Items]
Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment, Equipment	0.0
Business Combination, Goodwill, Expected Tax Deductible, Amount	29.3
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill	(29.3)
Business Combination, Recognized Asset Acquired, Asset	0.0
Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent	0.0
Business Combination, Recognized Liability Assumed, Liability	0.0
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less)	0.0
Business Combination, Consideration Transferred, Liabilities Incurred	0.0
Escrow Deposit	0.0
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill	0.0
Total business acquisitions and adjustments
Business Combination [Line Items]
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets	2.4
Business Combination, Goodwill, Expected Tax Deductible, Amount	175.9
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill	136.1
Business Combination, Recognized Asset Acquired, Asset	314.4
Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent	2.4
Business Combination, Recognized Liability Assumed, Liability	2.4
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less)	312.0
Business Combination, Consideration Transferred, Liabilities Incurred	(89.8)
Escrow Deposit	(20.0)
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill	202.2
Parkview Health Systems, Inc. [Member]
Business Combination [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	$ 165.0

EARNINGS PER SHARE

3 Months Ended

Mar. 31, 2026

Earnings Per Share [Abstract]

EARNINGS PER SHARE

Basic EPS is computed by dividing Net earnings attributable to Labcorp Holdings Inc. by the weighted-average number of common shares outstanding. Diluted EPS is computed by dividing Net earnings attributable to Labcorp Holdings Inc., and if applicable, including the impact of dilutive adjustments by the weighted-average number of common shares outstanding plus potentially dilutive shares, as if they had been issued at the earlier of the date of issuance or the beginning of the period presented. Potentially dilutive common shares result primarily from the Company’s outstanding stock options, restricted stock units, and/or performance share awards.

The following represents a reconciliation of Basic EPS to Diluted EPS:


	Three Months Ended March 31,
	2026					2025
	Basic EPS		Dilutive Effect	Diluted EPS		Basic EPS		Dilutive Effect	Diluted EPS

Net earnings attributable to LHI	$	277.8		$	277.8	$	212.8		$	212.8
Weighted-average common shares outstanding	82.3		0.6	82.9		83.6		0.7	84.3


Per share amount	$	3.37		$	3.35	$	2.54		$	2.52

The following table summarizes the potential common shares not included in the computation of Diluted EPS because their impact would have been antidilutive:


	Three Months Ended March 31,
		2026	2025
Employee stock options and awards		0.3	0.3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 278.0	$ 213.0
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	173.3	166.8
Stock compensation	31.7	32.8
Operating lease right-of-use asset expense	48.0	48.6
Deferred income taxes	2.0	(6.1)
Other, net	11.4	8.1
Change in assets and liabilities (net of effects of acquisitions and divestitures):
Increase in accounts receivable	(187.9)	(170.8)
(Increase) decrease in unbilled services	(6.2)	3.9
Decrease in supplies inventory	35.4	8.4
Decrease in prepaid expenses and other	4.0	45.0
Decrease in accounts payable	(138.7)	(147.6)
Decrease in unearned revenue	(32.1)	(8.9)
Decrease in accrued expenses and other	(27.4)	(174.7)
Net cash provided by operating activities	191.5	18.5
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(121.0)	(126.0)
Proceeds from sale of assets	7.8	0.5
Purchase of equity affiliates or other investments	(6.7)	(157.0)
Acquisition of businesses, net of cash acquired	(202.2)	(53.5)
Net cash used for investing activities	(322.1)	(336.0)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from term loan	750.0	0.0
Payments on senior notes	0.0	(1,000.0)
Proceeds from revolving credit facilities	0.0	64.8
Payments on revolving credit facilities	0.0	(64.8)
Proceeds from accounts receivable securitization	0.0	225.0
Net share settlement tax payments from issuance of stock to employees	(39.8)	(25.5)
Net proceeds from issuance of stock to employees	32.9	25.7
Dividends paid	(61.2)	(61.6)
Purchase of common stock	(98.0)	0.0
Other, net	(3.4)	(3.3)
Net cash provided by (used for) financing activities	580.5	(839.7)
Effect of exchange rate on changes in Cash and cash equivalents	(1.1)	7.9
Net increase (decrease) in Cash and cash equivalents	448.8	(1,149.3)
Cash and cash equivalents at beginning of period	532.3	1,518.7
Cash and cash equivalents	$ 981.1	$ 369.4

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
BALANCE at Dec. 31, 2024	$ 8,052.2	$ 7.6	$ 2.8	$ 8,303.4	$ (261.6)
Earnings per share:
Net earnings attributable to Labcorp Holdings Inc.	212.8	0.0	0.0	212.8	0.0
Other comprehensive earnings, net of tax	70.0	0.0	0.0	0.0	70.0
Dividends	(60.6)	0.0	0.0	(60.6)	0.0
Issuance of common stock under employee plans	25.7	0.0	25.7	0.0	0.0
Net share settlement tax payments from issuance of stock to employees	(25.5)	0.0	(25.5)	0.0	0.0
Stock compensation	32.8	0.0	32.8	0.0	0.0
BALANCE at Mar. 31, 2025	8,307.4	7.6	35.8	8,455.6	(191.6)
BALANCE at Dec. 31, 2025	8,619.8	7.5	0.0	8,639.9	(27.6)
Earnings per share:
Net earnings attributable to Labcorp Holdings Inc.	277.8	0.0	0.0	277.8	0.0
Other comprehensive earnings, net of tax	(35.6)	0.0	0.0	0.0	(35.6)
Dividends	(60.2)	0.0	0.0	(60.2)	0.0
Issuance of common stock under employee plans	32.9	0.0	32.9	0.0	0.0
Net share settlement tax payments from issuance of stock to employees	(39.8)	0.0	(39.8)	0.0	0.0
Stock compensation	31.7	0.0	31.7	0.0	0.0
Purchase of common stock	(98.0)	(0.1)	(24.8)	(73.1)	0.0
BALANCE at Mar. 31, 2026	$ 8,728.6	$ 7.4	$ 0.0	$ 8,784.4	$ (63.2)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

- Definition

Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.

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+ Details

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parentheticals) - shares shares in Millions	Mar. 31, 2026	Dec. 31, 2025
Shareholders' Equity:
Common stock, 82.3 and 82.2 shares outstanding at March 31, 2026, and December 31, 2025, respectively	82.3	82.2

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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+ Details

FAIR VALUE MEASUREMENTS AND DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Tables)

3 Months Ended

Mar. 31, 2026

Fair Value Disclosures [Abstract]

Company's population of financial assets and liabilities subject to fair value measurements

The Company’s population of financial assets and liabilities subject to fair value measurements were as follows:


				Fair Value Measurements
	Condensed Consolidated Balance Sheets Classification			March 31, 2026
		Fair Value at		Using Fair Value Hierarchy
		March 31, 2026		Level 1		Level 2		Level 3
Noncontrolling interest put	Noncontrolling interest	$	16.9	$	—	$	16.9	$	—
Cross currency swaps	Other liabilities	$	268.8	$	—	$	268.8	$	—
Interest rate swaps	Other liabilities	$	53.8	$	—	$	53.8	$	—


Cash surrender value of life insurance policies	Other assets, net	$	102.3	$	—	$	102.3	$	—
Deferred compensation asset	Other assets, net	$	56.5	$	—	$	56.5	$	—
Deferred compensation liability	Other liabilities	$	153.5	$	—	$	153.5	$	—

Contingent consideration	Accrued expenses and other/Other liabilities	$	139.8	$	—	$	—	$	139.8


				Fair Value Measurements
	Condensed Consolidated Balance Sheets Classification			December 31, 2025
		Fair Value at		Using Fair Value Hierarchy
		December 31, 2025		Level 1		Level 2		Level 3
Noncontrolling interest put	Noncontrolling interest	$	16.9	$	—	$	16.9	$	—
Cross currency swaps	Other liabilities	$	274.0	$	—	$	274.0	$	—
Interest rate swaps	Other liabilities	$	52.7	$	—	$	52.7	$	—
Cash surrender value of life insurance policies	Other assets, net	$	99.6	$	—	$	99.6	$	—
Deferred compensation asset	Other assets, net	$	53.1	$	—	$	53.1	$	—
Deferred compensation liability	Other liabilities	$	150.5	$	—	$	150.5	$	—

Contingent consideration	Accrued expenses and other/Other liabilities	$	50.0	$	—	$	—	$	50.0

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation


Fair Value Measurement of Level 3 Liabilities:	Contingent Consideration
Balance at December 31, 2025	$	50.0


Additions from business acquisitions	89.8
Balance at March 31, 2026	$	139.8	(1)

Derivative Instruments, Gain (Loss) [Table Text Block]

The table below provides information regarding the location and amount of pretax gains of derivatives designated in fair value hedging relationships:


		Amounts included in other comprehensive loss
	Three Months Ended March 31,
		2026		2025

Cross currency swaps		$	5.2	$	7.0

DEBT (Tables)

3 Months Ended

Mar. 31, 2026

Debt Disclosure [Abstract]

Schedule of Short-Term Debt [Table Text Block]

Short-term borrowings and the current portion of long-term debt consisted of the following:


	March 31, 2026		December 31, 2025
1.55% senior notes due 2026	$	500.0	$	500.0



Debt issuance costs	—		(0.2)
Current portion of note payable	0.4		0.3
Total Short-term borrowings and current portion of long-term debt	$	500.4	$	500.1

Schedule of Long-Term Debt Instruments [Table Text Block]

Long-term debt consisted of the following:


	March 31, 2026		December 31, 2025










2026 Term Loan	$	750.0	$	—
3.60% senior notes due 2027	600.0		600.0
2.95% senior notes due 2029	650.0		650.0
4.35% senior notes due 2030	650.0		650.0
2.70% senior notes due 2031	446.2		447.3
4.55% senior notes due 2032	500.0		500.0
4.80% senior notes due 2034	850.0		850.0
4.70% senior notes due 2045	900.0		900.0
Debt issuance costs	(37.5)		(37.7)
AR Facility	525.0		525.0

Total Long-term debt	$	5,833.7	$	5,084.6

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

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+ Details

BUSINESS SEGMENT INFORMATION

3 Months Ended

Mar. 31, 2026

Segment Reporting [Abstract]

BUSINESS SEGMENT INFORMATION

The following table is a summary of segment information for the three months ended March 31, 2026, and 2025. The “management approach” has been used to present the following segment information. This approach is based upon the way the management of the Company organizes segments within an enterprise for making operating decisions and assessing performance. Financial information is reported on the basis that it is used internally by the CODM for evaluating segment performance and deciding how to allocate resources to segments. The Company’s chief executive officer has been identified as the CODM.

The Company’s CODM uses segment operating income to evaluate segment performance and to allocate resources. This segment performance measure excludes the amortization of intangibles and other assets, restructuring and other charges, goodwill and other asset impairments, and certain corporate charges for items such as transaction costs and other special items. Other operating expenses are comprised primarily of rent, maintenance, sendout testing, utilities, travel and entertainment, and other segment expenses, including shipping costs for Dx. Segment asset information is not presented because it is not used by the CODM.


	For the Three Months Ended March 31, 2026
Revenues:	Dx		BLS		Intercompany eliminations and other		LHI
Revenues	$	2,762.1	$	780.6	$	(5.1)	$	3,537.6

Operating Earnings:
Labor	1,188.1		309.3
Supplies	613.5		121.5
Shipping costs			110.8
Depreciation	63.8		28.6
Other operating expenses	438.0		89.7
Segment operating income	$	458.7	$	120.7			$	579.4
General corporate and unallocated expenses							(116.6)
Amortization of intangibles and other assets							(75.6)
Restructuring and other charges							(6.4)

Total Operating income							380.8
Other (expense) income:
Interest expense							(55.1)
Investment income							12.2
Equity method loss, net							(5.1)
Other, net							(13.1)
Earnings from operations before income taxes							$	319.7


	For the Three Months Ended March 31, 2025
Revenues:	Dx		BLS		Intercompany eliminations and other		LHI
Revenues	$	2,629.6	$	721.3	$	(5.8)	$	3,345.1

Operating Earnings:
Labor	1,123.6		289.7
Supplies	586.6		111.1
Shipping costs			95.0
Depreciation	61.7		28.6
Other operating expenses	430.2		90.0
Segment operating income	$	427.5	$	106.9			$	534.4
General corporate and unallocated expenses							(132.4)
Amortization of intangibles and other assets							(69.6)
Restructuring and other charges							(6.4)

Total Operating income							326.0
Other (expense) income:
Interest expense							(56.0)
Investment income							6.5
Equity method loss, net							(0.3)
Other, net							(1.0)
Earnings from operations before income taxes							$	275.2

- Definition

The entire disclosure for segment reporting.

+ References

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-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 47
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-47

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/280/tableOfContent

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26

+ Details

PREFERRED STOCK AND COMMON SHAREHOLDERS' EQUITY (Tables)

3 Months Ended

Mar. 31, 2026

Stockholders' Equity Note [Abstract]

Changes in common shares issued and held in treasury

The changes in the Company’s shares of Common Stock issued and outstanding are summarized below:


			Three Months Ended March 31, 2026
Beginning balance			82.2
Shares issued under employee stock plans			0.5


Shares repurchased			(0.4)

Ending balance			82.3

Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]

The components of Accumulated other comprehensive loss were as follows:


	Foreign Currency Translation Adjustments		Net Benefit Plan Adjustments		Accumulated Other Comprehensive Loss
Balance at December 31, 2024	$	(264.7)	$	3.1	$	(261.6)
Current year adjustments	69.7		0.4		70.1
Tax effect on adjustments	—		(0.1)		(0.1)
Balance at March 31, 2025	$	(195.0)	$	3.4	$	(191.6)

Balance at December 31, 2025	$	(33.0)	$	5.4	$	(27.6)
Current year adjustments	(36.0)		0.5		(35.5)


Tax effect of adjustments	—		(0.1)		(0.1)
Balance at March 31, 2026	$	(69.0)	$	5.8	$	(63.2)

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Earnings per share:
Net earnings	$ 278.0	$ 213.0
Foreign currency translation adjustments	(36.0)	69.7
Net benefit plan adjustments	0.5	0.4
Other comprehensive (loss) earnings before tax	(35.5)	70.1
Provision for income tax related to items of comprehensive earnings	(0.1)	(0.1)
Other comprehensive (loss) earnings, net of tax	(35.6)	70.0
Comprehensive earnings	242.4	283.0
Less: Net earnings attributable to the noncontrolling interest	(0.2)	(0.2)
Comprehensive earnings attributable to Labcorp Holdings Inc.	$ 242.2	$ 282.8

REVENUES (Details) - USD ($) $ in Millions	3 Months Ended
REVENUES (Details) - USD ($) $ in Millions	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Revenue from Contract with Customer [Abstract]
Deferred Revenue, Revenue Recognized	$ 58.3	$ 68.9
Financing Receivable, Allowance for Credit Loss [Line Items]
Less: BLS allowance for credit losses	33.0		$ 36.4
Accounts receivable, net	2,288.6		2,103.8
Gross unbilled services	166.2		164.0
Less: BLS allowance for credit losses	(4.3)		(7.1)
Unbilled services, net	161.9		156.9
Allowance for Credit Loss, Write Off	(5.8)
Unbilled Services, Foreign Currency Translation Impact	0.0
Unbilled Services, Allowance for Credit Loss	4.3		7.1
Allowance for Credit Loss, Foreign Currency Translation Impact	(0.3)
Allowance for Credit Loss	37.3		43.5
Credit Loss Expense (Reversal)	(0.1)
Unbilled Services, Credit Loss Expense (Reversal)	0.0
Accounts Receivable, Credit Loss Expense (Reversal)	(0.1)
Unbilled Services, Allowance for Credit Loss, Write Off	2.8
Accounts Receivable, Allowance for Credit Loss, Writeoff	3.0
Accounts Receivable, Credit Loss Expense (Reversal)	(0.3)
Diagnostics
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounts Receivable, before Allowance for Credit Loss	1,513.2		1,349.0
Biopharma Laboratory Services
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounts Receivable, before Allowance for Credit Loss	$ 808.4		$ 791.2

EARNINGS PER SHARE (Policies)	3 Months Ended
EARNINGS PER SHARE (Policies)	Mar. 31, 2026
Earnings Per Share [Abstract]
Earnings Per Share, Policy	Basic EPS is computed by dividing Net earnings attributable to Labcorp Holdings Inc. by the weighted-average number of common shares outstanding. Diluted EPS is computed by dividing Net earnings attributable to Labcorp Holdings Inc., and if applicable, including the impact of dilutive adjustments by the weighted-average number of common shares outstanding plus potentially dilutive shares, as if they had been issued at the earlier of the date of issuance or the beginning of the period presented. Potentially dilutive common shares result primarily from the Company’s outstanding stock options, restricted stock units, and/or performance share awards.