Goodwill and Other Intangible Assets - Summary of Goodwill (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2025 USD ($)
Goodwill [Line Items]
Beginning Balance	$ 1,239.6	[1]
Foreign currency translation adjustments	5.7
Ending Balance	1,245.3	[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	56.7	[1]
Foreign currency translation adjustments	5.7
Ending Balance	$ 62.4	[1]

[1] Balances are presented net of accumulated impairment losses of $214.0 for the U.S. reportable segment and $43.8 for the international reportable segment. See discussion of the qualitative impairment analysis performed by the Company as of June 30, 2025 at Note 11.