v3.25.4
Accumulated other comprehensive income (loss) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance $ 19,494 $ 19,503 $ 15,891
Total other comprehensive income (loss), net of tax 699 (651) 637
Ending balance 21,318 19,494 19,503
Accumulated other comprehensive income (loss)      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance (2,471) (1,820) (2,457)
Ending balance (1,772) (2,471) (1,820)
Foreign currency translation      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance (2,310) (1,782) (2,328)
Gains (losses) 559 (535) 32
Less: Tax provision /(benefit) 2 21 (21)
Net gains (losses) on foreign currency translation 557 (556) 53
(Gains) losses reclassified to earnings 0 28 493
Less: Tax provision /(benefit) 0 0 0
Net (gains) losses reclassified to earnings 0 28 493
Total other comprehensive income (loss), net of tax 557 (528) 546
Ending balance (1,753) (2,310) (1,782)
Pension and other postretirement benefits      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance (61) (49) (39)
Gains (losses) (7) 0 1
Less: Tax provision /(benefit) (2) 0 0
Net gains (losses) on foreign currency translation (5) 0 1
(Gains) losses reclassified to earnings (4) (14) (12)
Less: Tax provision /(benefit) 0 (2) (1)
Net (gains) losses reclassified to earnings (4) (12) (11)
Total other comprehensive income (loss), net of tax (9) (12) (10)
Ending balance (70) (61) (49)
Derivative financial instruments      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance (46) 67 28
Gains (losses) 163 64 48
Less: Tax provision /(benefit) 38 27 11
Net gains (losses) on foreign currency translation 125 37 37
(Gains) losses reclassified to earnings (53) (207) 3
Less: Tax provision /(benefit) (13) (57) 1
Net (gains) losses reclassified to earnings (40) (150) 2
Total other comprehensive income (loss), net of tax 85 (113) 39
Ending balance 39 (46) 67
Available-for-sale securities      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance (54) (56) (118)
Gains (losses) 78 (2) 72
Less: Tax provision /(benefit) 18 0 11
Net gains (losses) on foreign currency translation 60 (2) 61
(Gains) losses reclassified to earnings 8 4 1
Less: Tax provision /(benefit) 2 0 0
Net (gains) losses reclassified to earnings 6 4 1
Total other comprehensive income (loss), net of tax 66 2 62
Ending balance $ 12 $ (54) $ (56)