PREFERRED STOCK AND COMMON SHAREHOLDERS' EQUITY (Details) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2016 USD ($) shares $ / shares	Sep. 30, 2016 USD ($) shares $ / shares	Sep. 30, 2015 USD ($)
Class of Stock [Line Items]
Stock conversion rate for zero-coupon subordinated notes (per thousand)	0.2	0.2
Restricted Stock Awards And Performance Shares Surrendered | $		$ 0.0	$ 10.8
Common Stock, Shares Authorized	265.0	265.0
Common Stock, Par or Stated Value Per Share | $ / shares	$ 0.10	$ 0.10
Preferred Stock, Shares Authorized	30.0	30.0
Preferred Stock, Par or Stated Value Per Share | $ / shares	$ 0.10	$ 0.10
Rollforward of common shares issued
Common shares issued, beginning balance (in shares)		123.9
Common stock issued under employee stock plans (in shares)	1.6	1.6
Common shares issued, ending balance (in shares)	125.7	125.7
Rollforward of common shares held in treasury
Common shares held in Treasury, beginning balance (in shares)		(22.6)
Common shares held in Treasury, ending balance (in shares)	(22.9)	(22.9)
Rollforward of common shares outstanding
Common shares outstanding, beginning balance (in shares)		101.3
Common stock issued under employee stock plans (in shares)	1.6	1.6
Common shares outstanding, ending balance (in shares)	102.8	102.8
Rollforward of Share Repurchase Program
Outstanding common stock repurchase authorization, ending balance | $	$ 789.5	$ 789.5
Target Ratio to Resume Share Repurchase [Member]
Class of Stock [Line Items]
Debt to EBITDA (Leverage) Ratio	2.5	2.5
Treasury Stock [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited		(0.3)
Common Stock [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited		(0.3)