CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net earnings	$ 883.9	$ 1,232.9	$ 712.9
Foreign currency translation adjustments	(176.6)	265.1	(250.8)
Net benefit plan adjustments	29.3	20.9	(40.3)
Other comprehensive earnings (loss) before tax	(147.3)	286.0	(291.1)
Provision (benefit) for income tax related to items of comprehensive earnings	17.9	(37.8)	(3.8)
Other comprehensive earnings (loss), net of tax	(129.4)	248.2	(294.9)
Comprehensive earnings	754.5	1,481.1	418.0
Less: Net earnings attributable to the noncontrolling interest	(0.2)	(5.8)	(1.1)
Net comprehensive earnings attributable to Laboratory Corporation of America Holdings	$ 754.3	$ 1,475.3	$ 416.9