Income Taxes (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current
Federal	$ (1.1)	$ 6.0	$ 5.6
State and local	(0.1)	0.0	(0.2)
Current domestic taxes	(1.2)	6.0	5.4
Foreign	18.0	16.9	15.3
Total current taxes	16.8	22.9	20.7
Deferred
Federal	(270.0)	55.8	44.7
State and local	1.2	10.5	33.7
Deferred domestic taxes	(268.8)	66.3	78.4
Foreign	8.3	6.5	11.8
Total deferred taxes	$ (260.5)	$ 72.8	$ 90.2