Derivative Instruments and Hedging Activities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative Instruments Gain (Loss) [Line Items]
Document Period End Date			Sep. 30, 2018
Interest expense	$ (45.2)	$ (27.7)	$ (99.6)	$ (90.7)
Total net sales	1,119.0	1,122.7	3,288.8	3,359.4
Cost of Services	(451.6)	(470.7)	(1,377.5)	(1,362.1)
Miscellaneous, net	1.8	(1.5)	0.9	1.7
Foreign exchange gain (loss), net	2.2	3.2	(2.3)	(4.5)
Gain (loss) recognized on non-designated derivative instruments:
Gain (loss) recognized on non-designated derivative instruments, total	3.1	0.8	5.2	2.7
Interest rate swaps
Derivative Instruments Gain (Loss) [Line Items]
Interest expense	(0.7)	(1.5)	(1.8)	(3.6)
Foreign exchange forward contracts
Derivative Instruments Gain (Loss) [Line Items]
Total net sales	(0.4)	0.0	2.4	0.0
Cost of Services	0.7	0.0	0.6	0.0
Foreign exchange gain (loss), net	$ 3.5	$ 2.3	$ 4.0	$ 6.3