v3.26.3
Changes in Product Support Liabilities (Detail) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
DEFERRED REVENUES ON EXTENDED WARRANTIES AND R&M CONTRACTS    
Beginning balance $ 1,411.1 $ 1,302.2
Deferred revenues 554.9 543.5
Revenues recognized (549.1) (508.9)
Currency translation (21.1) 75.9
Ending balance 1,395.8 1,412.7
Truck, Parts and Other    
WARRANTY RESERVES    
Beginning balance 596.2 606.1
Cost accruals 364.8 442.8
Payments (477.9) (594.8)
Change in estimates for pre-existing warranties 112.0 105.6
Currency translation and other (5.0) 24.3
Ending balance $ 590.1 $ 584.0