BUSINESS SEGMENT INFORMATION (Tables)

3 Months Ended

Sep. 30, 2020

Segment Reconciliation of Operating Income to Consolidated [Abstract]

Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
Revenues:
LCD	$	2,704.2	$	1,759.2	$	6,098.8	$	5,242.1
CDD	1,241.9		1,175.4		3,479.4		3,376.4
Intercompany eliminations and other	(50.0)		(6.2)		(90.0)		(17.1)
Revenues	3,896.1		2,928.5		9,488.7		8,601.4
Operating earnings (loss):
LCD	964.9		262.2		1,451.5		843.0
CDD	142.0		123.8		(131.2)		277.6
General corporate expenses	(59.8)		(46.1)		(168.2)		(126.8)
Total operating income	1,047.1		339.9		1,152.2		993.8
Non-operating expenses, net	(100.0)		(52.5)		(175.7)		(181.8)
Earnings before income taxes	947.1		287.4		976.4		812.0
Provision for income taxes	243.4		66.4		358.0		214.4
Net earnings	703.7		221.0		618.4		597.6
Less: Net earnings attributable to the noncontrolling interest	(0.3)		(0.3)		(0.6)		(0.9)
Net earnings attributable to Laboratory Corporation of America Holdings	$	703.4	$	220.7	$	617.8	$	596.7