v3.26.3
Inventories (Detail) - Truck, Parts and Other - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Inventory [Line Items]    
Finished products $ 991.9 $ 954.2
Work in process and raw materials 1,579.1 1,233.3
Inventories, gross $ 2,571.0 $ 2,187.5