QUARTERLY DATA (UNAUDITED)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

QUARTERLY DATA (UNAUDITED)

QUARTERLY DATA (UNAUDITED)

The following is a summary of unaudited quarterly data:

	Year Ended December 31, 2018
	1st Quarter		2nd Quarter		3rd Quarter		4th Quarter		Full Year
Revenues	$	2,848.3	$	2,866.3	$	2,831.3	$	2,787.5	$	11,333.4
Gross profit	779.0		835.1		789.9		772.4		3,176.4
Operating income	305.4		369.2		343.4		307.7		1,325.7
Net earnings attributable to Laboratory Corporation of America Holdings	173.2		233.8		318.8		157.9		883.7
Basic earnings per common share	1.70		2.29		3.14		1.58		8.71
Diluted earnings per common share	1.67		2.27		3.10		1.56		8.61

	Year Ended December 31, 2017 (b)
	1st Quarter		2nd Quarter		3rd Quarter		4th Quarter (a)		Full Year
Revenues	$	2,413.7	$	2,528.2	$	2,621.4	$	2,744.7	$	10,308.0
Gross profit	712.5		778.0		784.2		817.1		3,091.8
Operating income	318.1		329.8		326.7		330.6		1,305.2
Net earnings attributable to Laboratory Corporation of America Holdings	183.0		184.8		171.5		687.8		1,227.1
Basic earnings per common share	1.79		1.80		1.68		6.73		11.99
Diluted earnings per common share	1.75		1.78		1.65		6.63		11.81

(a) Net earnings attributable to Laboratory Corporation of America Holdings in the fourth quarter of 2017 includes amounts recorded due to TCJA.

(b) Amounts presented have been restated to comply with the full retrospective adoption of ASC 606.