Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Tax Disclosure [Abstract]
Tax expense (benefit)	$ (6.6)	$ 11.7	$ 15.1	$ 35.5
Income tax benefit, pension settlement	17.9
Pension settlement charge	$ 49.0		49.0
Income tax benefit, executive retirement & related costs			4.0
Executive retirement and related costs			$ 10.9