CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Consolidated Statements of Operations [Abstract]
Revenues	$ 14,876.8	$ 16,120.9	$ 13,978.5
Cost of Revenue	10,491.7	10,496.6	9,025.7
Gross profit	4,385.1	5,624.3	4,952.8
Selling, general and administrative expenses	1,996.6	1,952.1	1,729.3
Amortization of intangibles and other assets	259.3	369.6	275.4
Goodwill and Intangible Asset Impairment	271.5	0.0	462.1
Restructuring and other special charges	83.8	43.1	40.6
Operating income	1,773.9	3,259.5	2,445.4
Interest expense	(180.3)	(212.1)	(207.4)
Equity method income, net	5.4	26.5	2.9
Investment income	8.9	10.2	10.3
Other, net	(25.3)	42.5	(32.1)
Earnings before income taxes	1,582.6	3,126.6	2,219.1
Provision for income taxes	302.0	747.1	662.1
Net earnings	1,280.6	2,379.5	1,557.0
Less: Net earnings attributable to the noncontrolling interest	(1.5)	(2.2)	(0.9)
Net earnings attributable to Laboratory Corporation of America Holdings	$ 1,279.1	$ 2,377.3	$ 1,556.1