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Other Intangible Assets (Schedule of Other Intangible Assets) (Detail) - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Intangible Assets, Net (Excluding Goodwill) [Abstract]    
Customer relationships $ 190.9 $ 191.0
Noncompete agreements 28.7 33.8
Trademarks 70.6 70.6
Internal-use software licenses 17.1 24.0
Patents 2.8 2.8
Finite-Lived Intangible Assets, Gross 310.1 322.2
Accumulated amortization (164.6) (145.3)
Finite-Lived Intangible Assets, Net 145.5 176.9
Licenses 16.9 16.9
Intangible Assets, Net (Excluding Goodwill) $ 162.4 $ 193.8