Accumulated Other Comprehensive Income (Loss) - Reclassification out of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance		$ 1,745.8	$ 1,553.3	$ 1,812.4	$ 1,544.8
Other comprehensive income before reclassifications		(0.5)	2.3	8.8	6.7
Ending Balance		1,676.3	1,638.4	1,676.3	1,638.4
AOCI
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	[1]	(10.1)	(24.8)	(19.4)	(29.2)
Ending Balance	[1]	(10.6)	$ (22.5)	(10.6)	$ (22.5)
Foreign Currency Translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance				(15.3)
Other comprehensive income before reclassifications				(1.6)
Ending Balance		(16.9)		(16.9)
Derivative Financial Instruments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance				(4.1)
Other comprehensive income before reclassifications				10.4
Ending Balance		$ 6.3		$ 6.3

[1] Accumulated Other Comprehensive Income (Loss) ("AOCI").