CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Consolidated Statements of Operations [Abstract]
Revenues	$ 13,008.9	$ 12,161.6	$ 11,863.9
Cost of revenues	9,384.5	8,796.7	8,155.0
Gross profit	3,624.4	3,364.9	3,708.9
Selling, general and administrative expenses	2,230.0	2,021.4	1,763.1
Amortization of intangibles and other assets	256.4	219.8	193.6
Goodwill and other asset impairments	5.3	349.0	261.7
Restructuring and other charges	46.0	49.1	54.0
Operating income	1,086.7	725.6	1,436.5
Interest expense	(208.3)	(199.6)	(179.8)
Investment income	22.3	28.8	7.5
Equity method (loss) income, net	(1.4)	(1.4)	5.4
Other, net	60.2	15.5	(32.2)
Earnings from continuing operations before income taxes	959.5	568.9	1,237.4
Provision for income taxes	212.4	188.5	233.9
Earnings from continuing operations	747.1	380.4	1,003.5
Earnings from discontinued operations, net of tax	0.0	38.8	277.1
Net earnings	747.1	419.2	1,280.6
Less: Net earnings attributable to the noncontrolling interest	(1.1)	(1.2)	(1.5)
Net earnings attributable to Labcorp Holdings Inc.	$ 746.0	$ 418.0	$ 1,279.1
Basic earnings per common share from continuing operations	$ 8.89	$ 4.35	$ 11.00
Basic earnings per common share from discontinued operations	0	0.45	3.04
Basic earnings per common share	8.89	4.80	14.05
Diluted earnings per common share from continuing operations	8.84	4.33	10.94
Diluted earnings per common share from discontinued operations	0	0.44	3.03
Diluted earnings per common share	$ 8.84	$ 4.77	$ 13.97