v3.26.1
Changes in Product Support Liabilities (Detail) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
DEFERRED REVENUES ON EXTENDED WARRANTIES AND R&M CONTRACTS    
Beginning balance $ 1,411.1 $ 1,302.2
Deferred revenues 360.9 357.7
Revenues recognized (360.2) (330.4)
Currency translation (16.5) 81.5
Ending balance 1,395.3 1,411.0
Truck, Parts and Other    
WARRANTY RESERVES    
Beginning balance 596.2 606.1
Cost accruals 254.4 334.2
Payments (333.0) (406.4)
Change in estimates for pre-existing warranties 71.4 59.6
Currency translation and other (3.9) 26.4
Ending balance $ 585.1 $ 619.9