v3.26.1
Inventories (Detail) - Truck, Parts and Other - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Inventory [Line Items]    
Finished products $ 1,011.7 $ 954.2
Work in process and raw materials 1,372.5 1,233.3
Inventories, gross $ 2,384.2 $ 2,187.5