CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) Statement - USD ($) shares in Millions, $ in Millions	Total	Common Stock, Value [Member]	Stockholders' Equity, Total	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)
Stockholders' Equity		$ 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	$ (52.8)	$ 0.0	0.0	52.7	0.0
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		$ 0.0	0.0	0.0	0.6	0.6
Common Stock, Shares		240.3
Treasury Stock, Shares				(2.6)
Stockholders' Equity		$ 2.4		$ (39.5)	1,408.0	2,336.3	(10.5)	3,696.7
Common Stock, Shares		239.8
Treasury Stock, Shares	(3.1)
Stockholders' Equity	$ 2,750.9	$ 2.4			1,431.9	1,376.5	(14.3)	2,750.9
Net income (loss), Shares		0.0		0.0
Net income (loss)	(116.7)			$ 0.0	0.0	(116.7)	0.0	(116.7)
Common stock repurchased and retired	$ 0.0
Share-based compensation, Shares		2.2
Share-based compensation		$ 0.0
Share-based compensation				$ (6.2)	8.3	0.0	0.0	2.1
Stock Issued During Period, Shares, Employee Benefit Plan				0.0
Change in pension and postretirement liability, net of tax				$ 0.0	0.0		(0.2)	(0.2)
Common Stock, Shares		242.0
Treasury Stock, Shares	(3.9)			(3.9)
Stockholders' Equity	$ 2,636.1	$ 2.4		$ (51.8)	$ 1,440.2	$ 1,259.8	$ (14.5)	$ 2,636.1