Income Taxes Income tax rate breakdown (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
U.S. federal	$ (2.4)	$ (5.0)	$ 1.3
State and local	(0.5)	0.3	1.2
Foreign	2.6	1.6	3.3
Net current tax provision (benefit)	(0.3)	(3.1)	5.8
U.S federal	(1.1)	(19.5)	44.6
State and local	(1.8)	(1.2)	2.5
Foreign	(26.6)	(13.3)	13.4
Net valuation allowance increase (decrease)	27.1	9.9	(25.2)
Deferred income tax expense (benefit)	(2.4)	(24.1)	35.3
Provision (benefit) for income taxes	$ (2.7)	$ (27.2)	$ 41.1