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Goodwill and Other Intangible Assets - Schedule of Estimated Annual Amortization Expense Related to Other Intangible Assets (Detail) - USD ($)
$ in Millions
Sep. 30, 2022
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]    
2022 (excluding the six months ended June 30, 2022) $ 0.2  
2023 0.9  
2024 0.7  
2025 0.7  
2026 0.7  
2027 and thereafter 4.8  
Net Book Value [1] $ 8.0 $ 8.7
[1] The weighted-average remaining useful life of the unamortized intangible assets as of September 30, 2022 is approximately eleven years.