Restructuring - Restructuring Reserve Activity (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Restructuring and Related Activities [Abstract]
Document Period End Date	Mar. 31, 2017
Balance at January 1	$ 89.9	$ 4.7
Liabilities incurred	12.9	0.4
Liabilities paid/settled	(27.2)	(1.3)
Balance at March 31	$ 75.6	$ 3.8