Income Taxes - Components of Income Tax Expense (Benefit), Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current income taxes:
U.S. Federal	$ 13.0	$ 6.6	$ 13.6
U.S. State	1.1	0.6	0.9
Foreign	14.2	10.0	21.2
Current income taxes	28.3	17.2	35.7
Deferred income taxes:
U.S. Federal	(5.8)	3.0	(0.2)
U.S. State	0.1	(0.8)	0.0
Foreign	(1.0)	1.1	17.5
Deferred income taxes	(6.7)	3.3	17.3
Provision for income taxes	$ 21.6	$ 20.5	$ 53.0

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

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