Residual Value Obligation and Deferred Lease Revenue (Detail) - Truck, Parts and Other - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Property Subject to or Available for Operating Lease [Line Items]
Residual value guarantees	$ 247.0	$ 358.4
Residual value guarantees and deferred revenues, Total	329.1	457.4
Deferred Lease Revenue
Property Subject to or Available for Operating Lease [Line Items]
Deferred lease revenues	$ 82.1	$ 99.0