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Goodwill and Other Intangible Assets - Components of Other Intangible Assets (Detail) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Finite Lived Intangible Assets [Line Items]    
Gross Carrying Amount   $ 11.4
Accumulated Amortization   (3.6)
Net Book Value $ 0.0 7.8
Customer Relationships    
Finite Lived Intangible Assets [Line Items]    
Gross Carrying Amount   10.4
Accumulated Amortization   (2.8)
Net Book Value   7.6
Trade Names    
Finite Lived Intangible Assets [Line Items]    
Gross Carrying Amount   1.0
Accumulated Amortization   (0.8)
Net Book Value   $ 0.2