Income Taxes - Quarterly Disclosure (Details9) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Investments, Owned, Federal Income Tax Note [Line Items]
Income tax (provision) benefit	$ 7.7		$ 2.9	$ (0.3)	$ 12.9
Effective Income Tax Rate Continuing Operations	35.60%		85.30%
Discrete tax benefits (expense)	$ (0.7)		$ 2.2	$ (0.9)	$ 4.4
Unrecognized Tax Benefits, Period Increase (Decrease)	$ (60.9)
Federal
Investments, Owned, Federal Income Tax Note [Line Items]
Proceeds from Income Tax Refunds		$ 59.9