Income Taxes Provision for taxes (Details 1) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current:
Federal	$ (167.6)	$ (41.7)	$ 61.9
State	14.9	(15.9)	7.1
Non-U.S.	31.0	94.9	(26.5)
Total current	(121.7)	37.3	42.5
Deferred:
Federal	602.3	(147.9)	(38.0)
State	(39.9)	3.9	(19.5)
Non-U.S.	54.2	32.5	114.1
Total deferred	616.6	(111.5)	56.6
(Benefit from) provision for income taxes	$ 494.9	$ (74.2)	$ 99.1