CONDENSED CONSOLIDATED STATEMENT OF EQUITY (Unaudited) Statement - USD ($) shares in Millions, $ in Millions	Total		Common Stock, Value [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Other Comprehensive Income (Loss) [Member]	Total [Member]
Common Stock, Shares			243.0
Treasury Stock, Shares	2.0			(2.0)
Stockholders' Equity	$ (3,797.9)		$ 2.4	$ (34.2)	$ 1,398.2	$ 2,442.6	$ (11.1)	$ 3,797.9
Net income (loss), Shares			0.0	0.0
Net income (loss)	53.6		$ 0.0	$ 0.0	0.0	(53.6)	0.0	(53.6)
Common stock repurchased and retired, Shares			(5.6)	0.0
Common stock repurchased and retired	52.8		$ (0.1)	$ 0.0	0.0	(52.7)	0.0	(52.8)
Share-based compensation, Shares			2.9
Share-based compensation			$ 0.1
Stock Issued During Period, Shares, Treasury Stock Reissued				(0.6)
Share-based compensation				$ (5.3)	9.8	0.0	0.0	4.6
Stock Issued During Period, Shares, Employee Benefit Plan			0.0	0.0
Change in pension and postretirement liability, net of tax	$ 0.0	[1]	$ 0.0	$ 0.0	0.0	0.0	0.6	0.6
Common Stock, Shares			240.3
Treasury Stock, Shares	2.6			(2.6)
Stockholders' Equity	$ (3,696.7)		$ 2.4	$ (39.5)	$ 1,408.0	$ 2,336.3	$ (10.5)	$ 3,696.7

[1] Presented net of income tax expense of $1.0 million for the three months ended March 31, 2017.