Stockholders' Equity - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 903.6	$ 811.2	$ 870.2	$ 796.5
Ending Balance	878.9	822.0	878.9	822.0
Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(270.1)	(229.4)	(240.4)	(233.4)
Other comprehensive income (loss)	(25.9)	(7.8)	(55.6)	(3.8)
Ending Balance	(296.0)	(237.2)	(296.0)	(237.2)
Accumulated Defined Benefit Plans Adjustment | Defined Benefit Pension Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(158.6)	(207.5)	(163.3)	(214.5)
Other comprehensive income (loss)	2.2	3.5	6.9	10.5
Ending Balance	(156.4)	(204.0)	(156.4)	(204.0)
Accumulated Defined Benefit Plans Adjustment | OPEB Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(0.5)	(0.4)	(0.4)	(0.3)
Other comprehensive income (loss)	(0.1)	(0.1)	(0.2)	(0.2)
Ending Balance	(0.6)	(0.5)	(0.6)	(0.5)
Total Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(429.2)	(437.3)	(404.1)	(448.2)
Other comprehensive income (loss)	(23.8)	(4.4)	(48.9)	6.5
Ending Balance	$ (453.0)	$ (441.7)	$ (453.0)	$ (441.7)