Accumulated Other Comprehensive Income (Loss) - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Equity [Abstract]
Pension and other postretirement benefit plans, tax benefit (expense)	$ (0.3)	$ (0.5)
Cumulative pension and other postretirement benefit plans, tax expense (benefits)	13.3	16.0
Unrealized gain (loss) on derivatives, income tax expense (benefit)	(2.0)	0.5
Cumulative unrealized gain (loss) on derivatives, income tax expense (benefit)	$ 1.4	1.6
Loss due to deconsolidation of Venezeula, net of tax		5.9
Tax benefit on loss due to deconsolidation of Venezuela		$ 2.6