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Goodwill and Other Intangible Assets - Summary of Goodwill (Detail)
$ in Millions
 9 Months Ended
Sep. 30, 2025
USD ($)
Goodwill [Line Items]  
Beginning Balance $ 1,239.6 [1]
Foreign currency translation adjustments 6.9
Ending Balance 1,246.5 [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 56.7 [1]
Foreign currency translation adjustments 6.9
Ending Balance $ 63.6 [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 September 30, 2025 at Note 11.