CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (USD $) In Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
BALANCE at Dec. 31, 2010	$ 2,466.3	$ 12.2	$ 53.9	$ 3,246.6	$ (934.9)	$ 88.5
Net earnings attributable to Laboratory Corporation of America Holdings	519.7	0	0	519.7	0	0
Other comprehensive earnings, net of tax	(43.0)	0	0	0	0	(43.0)
Issuance of common stock under employee stock plans	118.0	0.1	117.9	0	0	0
Surrender of restricted stock and performance share awards	(6.0)	0	0	0	(6.0)	0
Conversion of zero-coupon convertible debt	36.2	0.1	36.1	0	0	0
Stock compensation	48.9	0	48.9	0	0	0
Purchase of noncontrolling interest	(3.7)	0	(3.7)	0	0	0
Income tax benefit from stock options exercised	11.0	0	11.0	0	0	0
Purchase of common stock	(643.9)	(0.7)	(264.1)	(379.1)	0	0
BALANCE at Dec. 31, 2011	2,503.5	11.7	0	3,387.2	(940.9)	45.5
Net earnings attributable to Laboratory Corporation of America Holdings	583.1	0	0	583.1	0	0
Other comprehensive earnings, net of tax	23.9	0	0	0	0	23.9
Issuance of common stock under employee stock plans	85.2	0.1	85.1	0	0	0
Surrender of restricted stock and performance share awards	(10.9)	0	0	0	(10.9)	0
Conversion of zero-coupon convertible debt	0	0	0	0	0	0
Stock compensation	40.7	0	40.7	0	0	0
Purchase of noncontrolling interest	0	0	0	0	0	0
Income tax benefit from stock options exercised	8.4	0	8.4	0	0	0
Purchase of common stock	(516.5)	(0.5)	(134.2)	(381.8)	0	0
BALANCE at Dec. 31, 2012	2,717.4	11.3	0	3,588.5	(951.8)	69.4
Net earnings attributable to Laboratory Corporation of America Holdings	573.8	0	0	573.8	0	0
Other comprehensive earnings, net of tax	(3.2)	0	0	0	0	(3.2)
Issuance of common stock under employee stock plans	174.0	0.2	173.8	0	0	0
Surrender of restricted stock and performance share awards	(7.1)	0	0	0	(7.1)	0
Conversion of zero-coupon convertible debt	4.1	0	4.1	0	0	0
Stock compensation	37.3	0	37.3	0	0	0
Income tax benefit from stock options exercised	10.6	0	10.6	0	0	0
Purchase of common stock	(1,015.6)	(1.0)	(225.8)	(788.8)	0	0
BALANCE at Dec. 31, 2013	$ 2,491.3	$ 10.5	$ 0	$ 3,373.5	$ (958.9)	$ 66.2