Residual Value Obligation and Deferred Lease Revenue (Detail) - Truck, Parts and Other - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Property Subject to or Available for Operating Lease [Line Items]
Residual value guarantees	$ 60.2	$ 119.7
Residual value guarantees and deferred revenues, Total	80.3	142.6
Deferred Lease Revenue
Property Subject to or Available for Operating Lease [Line Items]
Deferred lease revenues	$ 20.1	$ 22.9