v3.25.4
Accumulated other comprehensive loss - Schedule of Amounts Reclassified From AOCI to Net Loss (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Total cost of revenues $ 8,781 $ 8,634 $ 8,908
Income tax expense (benefit) 326 368 361
Other non-operating (income) expense, net (4) 55 36
Total amounts reclassified from Accumulated other comprehensive income (loss) to Net income (1,182) (1,273) (955)
Reclassification out of Accumulated Other Comprehensive Income      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Total amounts reclassified from Accumulated other comprehensive income (loss) to Net income (8) 25 (10)
Net change in fair value of effective portion of cash flow hedges | Reclassification out of Accumulated Other Comprehensive Income      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Total cost of revenues (7) (26) (48)
Income tax expense (benefit) 2 7 12
Total amounts reclassified from Accumulated other comprehensive income (loss) to Net income (5) (19) (36)
Actuarial losses and prior service costs for defined benefit pension plans and other postretirement benefit plans | Reclassification out of Accumulated Other Comprehensive Income      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Income tax expense (benefit) 1 (14) (8)
Other non-operating (income) expense, net (4) 58 34
Total amounts reclassified from Accumulated other comprehensive income (loss) to Net income $ (3) $ 44 $ 26