Income Taxes (Components of Income Tax Expense (Benefit)) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current tax expense:
Federal	$ 13.3	$ (8.6)	$ (32.7)
State	3.5	(0.4)	(2.1)
Foreign	50.9	42.8	60.4
Deferred tax expense (benefit):
Federal	5.7	19.3	24.1
State	(0.6)	1.7	0.3
Foreign	1.4	(12.1)	(3.3)
Income Tax Expense (Benefit)	$ 74.2	$ 42.7	$ 46.7