PREFERRED STOCK AND COMMON SHAREHOLDERS' EQUITY (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Stockholders' Equity Note [Abstract]
Common stock, shares authorized	265.0
Common stock, par value per share (in dollars per share)	$ 0.10
Preferred stock, shares authorized	30.0
Preferred stock, par value per share (in dollars per share)	$ 0.10
Preferred stock, shares outstanding	0
Rollforward of common shares issued
Common shares issued, beginning balance (in shares)	108.1
Common stock issued under employee stock plans (in shares)	0.9
Common stock issued upon conversion of zero-coupon subordinated notes (in shares)	0.1
Retirement of common stock (in shares)	(1.7)
Common shares issued, ending balance (in shares)	107.4
Rollforward of common shares held in treasury
Common shares held in Treasury, beginning balance (in shares)	(22.4)
Common stock issued upon conversion of zero-coupon subordinated notes (in shares)	0.1
Surrender of restricted stock and performance share awards (in shares)	(0.1)
Common shares held in Treasury, ending balance (in shares)	(22.5)
Rollforward of common shares outstanding
Common shares outstanding, beginning balance (in shares)	85.7
Common stock issued under employee stock plans (in shares)	0.9
Common stock issued upon conversion of zero-coupon subordinated notes (in shares)	0.1
Surrender of restricted stock and performance share awards (in shares)	(0.1)
Retirement of common stock (in shares)	(1.7)
Common shares outstanding, ending balance (in shares)	84.9
Rollforward of Share Repurchase Program
Outstanding common stock repurchase authorization, beginning balance	$ 1,058.5
Common stock repurchased (in shares)	(1.7)
Purchase of common stock	(164.2)	(479.2)
Outstanding common stock repurchase authorization, ending balance	$ 894.4