CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) - 6 months ended Jun. 30, 2015 - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income [Member]
BALANCE at Dec. 31, 2014	$ 2,820.5	$ 10.4	$ 0.0	$ 3,786.1	$ (965.5)	$ (10.5)
Net earnings attributable to Laboratory Corporation of America Holdings	169.7			169.7
Other comprehensive earnings, net of tax	(89.3)					(89.3)
Stock Issued During Period, Shares, Acquisitions	1.5
Adjustments to Additional Paid in Capital, Other	1,761.0
Other Significant Noncash Transaction, Value of Consideration Given	1,762.5
Issuance of common stock under employee stock plans	58.8	0.1	58.7
Surrender of restricted stock and performance share awards	(10.4)				(10.4)
Stock compensation	54.0		54.0
Income tax benefit from stock options exercised	3.9		3.9
Purchase of common stock	0.0	0.0	0.0	0.0
BALANCE at Jun. 30, 2015	$ 4,769.7	$ 12.0	$ 1,877.6	$ 3,955.8	$ (975.9)	$ (99.8)