v3.26.1
Commitments and contingencies - Schedule of Product Warranty Liability (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Movement in Standard Product Warranty Accrual [Roll Forward]    
Beginning balance $ 106 $ 88
Increase for warranties 24 24
Decrease for payments (30) (16)
Ending balance $ 100 $ 96