Restructuring - Restructuring Reserve Activity (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Restructuring and Related Activities [Abstract]
Balance at January 1			$ 89.9	$ 4.7
Liabilities incurred	$ 17.4	$ 7.4	44.7	12.8
Restructuring Liabilities	(8.2)	45.5	(8.2)	45.5
Liabilities paid/settled			(57.8)	(11.7)
Balance at September 30	$ 68.6	$ 51.3	$ 68.6	$ 51.3