CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Provision for income taxes	$ 55.1	$ 38.2	$ 168.8	$ 260.8
Foreign currency translation adjustments	(56.0)	(256.5)	43.8	(572.2)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	1.1	1.3	3.4	4.2
Other comprehensive earnings (loss) before tax	(54.9)	(255.2)	47.2	(568.0)
Tax effect of adjustments	(0.2)	(0.3)	(0.8)	(1.1)
Other comprehensive earnings (loss), net of tax	(55.1)	(255.5)	46.4	(569.1)
Net earnings	183.6	353.2	586.0	1,204.2
Comprehensive earnings	128.5	97.7	632.4	635.1
Less: Net earnings attributable to the noncontrolling interest	(0.3)	(0.4)	(0.9)	(1.2)
Comprehensive earnings attributable to Laboratory Corporation of America Holdings	$ 128.2	$ 97.3	$ 631.5	$ 633.9