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Intangible Assets - Major Classes of Amortizable Intangible Assets (Detail) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Amortizable intangible assets, net | $ 4,389.4 | $ 4,633.3
Expiration Lists [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortizable intangible assets, gross | 8,341.8 | 8,222.8
Accumulated amortization | (4,025.8) | (3,733.2)
Amortizable intangible assets, net | 4,316.0 | 4,489.6
Non-Compete Agreements [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortizable intangible assets, gross | 103.3 | 112.2
Accumulated amortization | (79.9) | (74.9)
Amortizable intangible assets, net | 23.4 | 37.3
Trade Names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortizable intangible assets, gross | 119.7 | 171.8
Accumulated amortization | (69.7) | (65.4)
Amortizable intangible assets, net | $ 50.0 | $ 106.4

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