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Intangible Assets - Major Classes of Amortizable Intangible Assets (Detail) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Finite-Lived Intangible Assets [Line Items] |  |
Amortizable intangible assets, net | $ 3,954.0 | $ 2,399.9
Expiration Lists [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortizable intangible assets, gross | 6,696.8 | 4,753.2
Accumulated amortization | (2,812.2) | (2,436.7)
Amortizable intangible assets, net | 3,884.6 | 2,316.5
Non-Compete Agreements [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortizable intangible assets, gross | 76.0 | 75.9
Accumulated amortization | (62.8) | (57.8)
Amortizable intangible assets, net | 13.2 | 18.1
Trade Names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Amortizable intangible assets, gross | 105.2 | 107.8
Accumulated amortization | (49.0) | (42.5)
Amortizable intangible assets, net | $ 56.2 | $ 65.3

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