v3.25.2
Product Support Liabilities - Additional Information (Detail)
$ in Millions
 6 Months Ended
Jun. 30, 2025
USD ($)
Product Warranty Liability [Line Items]  
Deferred revenue on extended warranties and R&M recognize, in 2025 $ 231.6
Deferred revenue on extended warranties and R&M recognize, in 2026 431.8
Deferred revenue on extended warranties and R&M recognize, in 2027 338.2
Deferred revenue on extended warranties and R&M recognize, in 2028 225.9
Deferred revenue on extended warranties and R&M recognize, in 2029 127.4
Deferred revenue on extended warranties and R&M recognize, thereafter $ 56.1
Truck, Parts and Other  
Product Warranty Liability [Line Items]  
Standard product warranty, description The Company generally offers one year warranties covering most of its vehicles and related aftermarket parts. For vehicles equipped with engines manufactured by PACCAR, the Company generally offers two year warranties on the engine.
Standard product warranty, term 1 year
Extended product warranty, description Optional extended warranty and R&M contracts can be purchased for periods which generally range up to five years.
Truck, Parts and Other | Maximum  
Product Warranty Liability [Line Items]  
Extended product warranty, term 5 years
Truck, Parts and Other | Engines manufactured by PACCAR  
Product Warranty Liability [Line Items]  
Standard product warranty, term 2 years