Derivative Instruments and Hedging Activities (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative Instruments Gain (Loss) [Line Items]
Interest expense	$ (28.4)	$ (32.2)	$ (54.4)	$ (63.0)
Total net sales	1,105.6	1,133.9	2,169.8	2,236.7
Cost of Services	(559.7)	(536.4)	(1,098.9)	(1,041.9)
Miscellaneous, net	(1.9)	1.9	(0.9)	3.2
Foreign exchange gain (loss), net	(3.1)	(4.6)	(4.5)	(7.7)
Gain (loss) recognized on non-designated derivative instruments:
Gain (loss) recognized on non-designated derivative instruments, total	(0.3)	3.3	2.1	1.9
Interest rate swaps
Derivative Instruments Gain (Loss) [Line Items]
Interest expense	(0.8)	(0.9)	(1.1)	(2.1)
Foreign exchange forward contracts
Derivative Instruments Gain (Loss) [Line Items]
Total net sales	0.2	0.0	2.8	0.0
Cost of Services	0.0	0.0	(0.1)	0.0
Foreign exchange gain (loss), net	$ 0.3	$ 4.2	$ 0.5	$ 4.0