Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Jun. 30, 2015	Sep. 30, 2015	Sep. 30, 2014
Reconciliation of taxes from continuing operations
Effective income tax rate on continuing operations (as a percent)		32.20%	32.90%
Anticipated effective tax rate for beginning of year to date (as a percent)		33.00%
Expense (benefit) of discrete tax expense related to foreign jurisdiction, net	$ 2.0	$ (3.3)	$ 0.6