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Goodwill and Other Intangibles - Narrative (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Acquired Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets $ 9.3 $ 14.8 $ 16.9
Other Intangible Assets      
Acquired Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets 9.3 14.8 16.9
Estimated future amortization expense for 2022 9.2    
Estimated future amortization expense for 2023 9.1    
Estimated future amortization expense for 2024 8.5    
Estimated future amortization expense for 2025 8.1    
Estimated future amortization expense for 2026 7.9    
Computer Software      
Acquired Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets $ 434.2 $ 390.1 $ 366.9