Stockholders' Equity (Accumulated Other Comprehensive Loss) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Foreign Currency Translation
Beginning balance	$ (102.8)		$ (51.7)
Other comprehensive income (loss), net of tax	(1.8)	[1]	(51.1)	[1]	(6.9)	[1]
Ending balance	(104.6)		(102.8)		(51.7)
Hedging
Beginning balance	(16.7)		6.1
Other comprehensive income (loss), net of tax	26.7	[2]	(22.8)	[2]	19.1	[2]
Ending balance	10.0		(16.7)		6.1
Defined Pension and Other Post-Retirement Benefits
Beginning balance	(324.3)		(206.5)
Other comprehensive income (loss), net of tax	22.9	[3]	(117.8)	[3]	(38.5)	[3]
Ending balance	(301.4)		(324.3)		(206.5)
Accumulated Other Comprehensive Loss, beginning balance	(443.8)		(252.1)
Other comprehensive income (loss), net of tax	47.8		(191.7)		(26.3)
Accumulated Other Comprehensive Loss, ending balance	$ (396.0)		$ (443.8)		$ (252.1)

[1] Net of income tax (expense) benefit of $(2.2), $5.1 and $0.0 for the years ended December 31, 2012, 2011 and 2010, respectively.

[2] Net of income tax (expense) benefit of $(12.3), $12.9 and $(11.1) for the years ended December 31, 2012, 2011 and 2010, respectively.

[3] Net of income tax (expense) benefit of $(6.5), $58.0 and $18.0 for the years ended December 31, 2012, 2011 and 2010, respectively.