Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Tax expense (benefit)	$ 17.0	$ 9.2	$ 23.9	$ 21.7
Effective tax rate	28.60%	25.50%	27.40%	27.10%
Income Tax Benefit Executive Retirement & Related Costs		$ 4.0
Executive retirement and related costs		$ 10.9		$ 10.9
Current income tax benefit, restructuring			$ 7.4
Restructuring and related charges	$ (1.5)		$ 21.4