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Income Taxes (Schedule of Components of Provision for Income Taxes) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current tax expense (benefit)	$ 67.0us-gaap_CurrentIncomeTaxExpenseBenefit	$ 156.1us-gaap_CurrentIncomeTaxExpenseBenefit	$ 139.9us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred tax expense (benefit)	17.2us-gaap_DeferredIncomeTaxExpenseBenefit	17.7us-gaap_DeferredIncomeTaxExpenseBenefit	(3.6)us-gaap_DeferredIncomeTaxExpenseBenefit
Benefit (provision) for income taxes	84.2us-gaap_IncomeTaxExpenseBenefit	175.0us-gaap_IncomeTaxExpenseBenefit	136.7us-gaap_IncomeTaxExpenseBenefit
United States [Member]
Current tax expense (benefit)	52.9	118.5	121.3
Deferred tax expense (benefit)	15.6	7.7	(3.7)
Benefit (provision) for income taxes	68.5	126.2	117.6
Non-U.S. [Member]
Current tax expense (benefit)	14.1	37.6	18.6
Deferred tax expense (benefit)	1.6	11.2	0.5
Benefit (provision) for income taxes	15.7	48.8	19.1
Deferred Tax Asset [Domain]
Deferred tax expense (benefit)		$ 18.9	$ (3.2)

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.