Derivative Instruments and Hedging Activities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivative Instruments Gain (Loss) [Line Items]
Interest expense	$ (27.7)	$ (32.4)	$ (90.7)	$ (68.2)
Miscellaneous, net	(1.5)	(4.2)	1.7	3.6
Foreign exchange gain (loss), net	3.2	2.0	(4.5)	(1.6)
Gain (loss) recognized on non-designated derivative instruments:
Gain (loss) recognized on non-designated derivative instruments, total	0.8	(4.2)	2.7	5.9
Interest rate swaps
Derivative Instruments Gain (Loss) [Line Items]
Interest expense	(1.5)	(1.1)	(3.6)	(3.2)
Gain on foreign currency option contracts
Derivative Instruments Gain (Loss) [Line Items]
Miscellaneous, net	0.0	0.0	0.0	35.6
Foreign exchange forward contracts
Derivative Instruments Gain (Loss) [Line Items]
Miscellaneous, net	0.0	(3.6)	0.0	(26.3)
Foreign exchange gain (loss), net	$ 2.3	$ 0.5	$ 6.3	$ (0.2)