Goodwill and Other Intangible Assets - Summary of Goodwill (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($)
Goodwill [Line Items]
Beginning Balance	$ 1,251.0	[1]
Foreign currency translation adjustments	(5.5)
Ending Balance	1,245.5	[1]
U.S. Operating Segment
Goodwill [Line Items]
Beginning Balance	1,182.9	[1]
Foreign currency translation adjustments	0.0
Ending Balance	1,182.9	[1]
International Operating Segment
Goodwill [Line Items]
Beginning Balance	68.1	[1]
Foreign currency translation adjustments	(5.5)
Ending Balance	$ 62.6	[1]

[1] Balances are presented net of accumulated impairment losses of $214.0 for the U.S. operating segment and $43.8 for the international operating segment. See discussion of the qualitative impairment analysis performed by the Company as of September 30, 2024 at Note 12.