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Intangible Assets - Major Classes of Amortizable Intangible Assets (Detail) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Amortizable intangible assets, net $ 4,532.2 $ 4,530.1
Expiration Lists [Member]    
Finite-Lived Intangible Assets [Line Items]    
Amortizable intangible assets, gross 9,001.4 8,763.7
Accumulated amortization (4,558.9) (4,312.7)
Amortizable intangible assets, net 4,442.5 4,451.0
Non-Compete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Amortizable intangible assets, gross 135.9 117.7
Accumulated amortization (90.9) (85.4)
Amortizable intangible assets, net 45.0 32.3
Trade Names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Amortizable intangible assets, gross 120.6 120.0
Accumulated amortization (75.9) (73.2)
Amortizable intangible assets, net $ 44.7 $ 46.8