Other Expense, Net (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Restructuring expense	$ 13.3			$ 1.3	$ 13.3	$ 26.9
Merger and acquisition expense	6.4			5.9	6.4	18.9
Lease termination settlement	0.0	$ 5.3		0.0	5.3	0.0
Asset impairment expense	0.0			106.5	0.0	106.5
Other Income				(2.6)		(4.5)
Other Expense	2.3				2.5
Other expense, net	$ 22.0			$ 111.1	27.5	147.8
Proceeds from sale of business, net of cash divested			$ 80.0		$ 0.0	$ 5.4