Restructuring and Other Charges - Restructuring Reserve Activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring accrual balances and related activity
Balance at beginning of period	$ 4.7	$ 7.6	$ 31.7
Liabilities incurred	59.4	21.2	11.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Restructuring Liabilities	45.5
Liabilities paid/settled	(19.7)	(24.1)	(35.7)
Balance at end of period	$ 89.9	$ 4.7	$ 7.6