CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenue, Net	$ 2,597.9	$ 2,372.7	$ 7,504.4	$ 7,049.9
Net restructuring and other special charges	21.6	22.8	64.6	48.6
Provision for income taxes	97.7	83.6	281.1	280.3
Net earnings	183.4	179.8	564.8	548.6
Other Comprehensive Earnings, Net of Tax
Foreign currency translation adjustments	59.7	(27.4)	276.3	11.7
Net benefit plan adjustments			(1.2)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	2.3	(1.6)	3.4	(0.5)
Other comprehensive earnings (loss) before tax	62.0	(29.0)	279.7	11.2
Tax effect of adjustments	(20.2)	8.3	(41.1)	(21.8)
Other comprehensive earnings (loss), net of tax	41.8	(20.7)	238.6	(10.6)
Comprehensive earnings	225.2	159.1	803.4	538.0
Less: Net earnings attributable to the noncontrolling interest	(2.8)	(0.3)	(3.4)	(0.9)
Comprehensive earnings attributable to Laboratory Corporation of America Holdings	$ 222.4	$ 158.8	$ 800.0	$ 537.1