STOCKHOLDERS' EQUITY Capital Stock Information (Details 1) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended			13 Months Ended	0 Months Ended
	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Feb. 17, 2015	Dec. 31, 2011
Common stock, shares issued (in shares)		124.6	123.7		124.6
Common Stock, unissued shares (in shares)		175.4			175.4
Shares of common stock in treasury (in shares)		19.2	13.8		19.2
Value of treasury stock on an average cost basis (in dollars)		$ (801.9)	$ (630.2)		$ (801.9)
Number of common shares held in rabbi trust (in shares)		0.8	0.8		0.8
Preferred stock, shares authorized (in shares)		50.0			50.0
Preferred stock, par value per share (in dollars per share)		$ 0.01			$ 0.01
Preferred stock, shares outstanding (in shares)		0	0		0
Stock Repurchase Program, Authorized Amount		200			200
Treasury Stock, Shares, Acquired	5.3				6.1
Treasury Stock, Value, Acquired, Cost Method	170.0	172.9	33.7	3.8	200.0
Common Stock, Dividends, Per Share, Cash Paid		$ 0.05
Common Stock
Common stock, shares outstanding (in shares)		105.4	109.9	109.9	105.4		108.8
Shares of common stock in treasury (in shares)		19.2			19.2
Treasury Stock, Shares, Acquired		5.4	0.9	0.1
Treasury Stock, Value, Acquired, Cost Method		0	0	0
4% Convertible Senior Subordinated Notes due June 1, 2015
Common Stock reserved for contingently issuable shares (in shares)		7.9			7.9
Interest rate of debt securities (as a percent)		4.00%			4.00%
Stock Options and Restricted Stock
Common Stock reserved for contingently issuable shares (in shares)		3.3			3.3
All Company Stock Plans
Number of common shares held in rabbi trust (in shares)		0.8			0.8
Value of common shares held in rabbi trust (in dollars)		17.8			17.8
Subsequent Event [Member]
Stock Repurchase Program, Authorized Amount						$ 200
Common Stock, Dividends, Per Share, Declared						$ 0.06