Accumulated Other Comprehensive Income (Loss) - Change in the Components of AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Pretax Amount	$ 17.1	$ (58.3)	$ 49.4
Other Comprehensive Income (Loss), Tax Effect	0.0	(0.2)	(0.6)
Net Current-period Other Comprehensive Income (Loss)	17.1	(58.5)	48.8
Derivatives Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Pretax Amount	(8.9)
Other Comprehensive Income (Loss), Tax Effect	0.0
Net Current-period Other Comprehensive Income (Loss)	(8.9)
Derivative Instruments (Loss) Gain
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Pretax Amount		(1.6)	(7.8)
Other Comprehensive Income (Loss), Tax Effect		0.0	2.9
Net Current-period Other Comprehensive Income (Loss)		(1.6)	(4.9)
Pension and Postretirement Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Pretax Amount	13.6	(32.2)	12.3
Other Comprehensive Income (Loss), Tax Effect	0.0	(0.2)	(3.5)
Net Current-period Other Comprehensive Income (Loss)	13.6	(32.4)	8.8
Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Pretax Amount	12.4	(24.5)	44.9
Other Comprehensive Income (Loss), Tax Effect	0.0	0.0	0.0
Net Current-period Other Comprehensive Income (Loss)	$ 12.4	$ (24.5)	$ 44.9