CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Provision for income taxes	$ 182,600,000	$ 65,400,000	$ 434,300,000	$ 114,600,000
Net earnings	468,000,000.0	231,600,000	1,238,100,000	(85,300,000)
Other Comprehensive Earnings, Net of Tax
Foreign currency translation adjustments	43,800,000	66,900,000	(23,000,000.0)	(80,500,000)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	2,100,000	2,700,000	5,100,000	5,400,000
Other comprehensive earnings (loss) before tax	45,900,000	69,600,000	(17,900,000)	(75,100,000)
Tax effect of adjustments	(600,000)	(700,000)	(1,400,000)	(1,500,000)
Other comprehensive earnings (loss), net of tax	45,300,000	68,900,000	(19,300,000)	(76,600,000)
Comprehensive earnings	513,300,000	300,500,000	1,218,800,000	(161,900,000)
Less: Net earnings attributable to the noncontrolling interest	(600,000)	0	(1,100,000)	(300,000)
Comprehensive earnings attributable to Laboratory Corporation of America Holdings	$ 512,700,000	$ 300,500,000	$ 1,217,700,000	$ (162,200,000)