v3.26.1
Financial structure and financial costs - Hedging instruments and hedged items by strategy (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Bonds | Interest Rate Swap | Fair value hedge      
Hedging instruments and hedged items by hedging strategy      
Nominal amount of hedging instruments 5,250 6,250 3,500
Carrying amount of hedging instruments assets $ 25    
Carrying amount of hedging instruments liabilities (295) $ (230) $ (86)
Carrying amount of hedged items liabilities (5,028) (6,103) (3,457)
Cumulative FVH adjustments included in the carrying amount of the hedged items assets $ 222    
Cumulative FVH adjustments included in the carrying amount of the hedged items liabilities   $ 147 $ 43
Bonds | Interest Rate Swap | Cash flow hedge      
Hedging instruments and hedged items by hedging strategy      
Nominal amount of hedging instruments 11,998 12,577 12,023
Carrying amount of hedging instruments assets $ 411 $ 543 $ 611
Carrying amount of hedging instruments liabilities $ (28)    
Bonds | Cross Currency Swaps | Fair value hedge      
Hedging instruments and hedged items by hedging strategy      
Nominal amount of hedging instruments 3,454 4,084 4,671
Carrying amount of hedging instruments assets $ 92 $ 27 $ 45
Carrying amount of hedging instruments liabilities (216) (618) (559)
Carrying amount of hedged items liabilities (3,391) (3,588) (4,232)
Cumulative FVH adjustments included in the carrying amount of the hedged items assets $ 63    
Cumulative FVH adjustments included in the carrying amount of the hedged items liabilities   $ 496 $ 439
Bonds | Cross Currency Swaps | Cash flow hedge      
Hedging instruments and hedged items by hedging strategy      
Nominal amount of hedging instruments 13,126 15,055 17,511
Carrying amount of hedging instruments assets $ 365 $ 5 $ 108
Carrying amount of hedging instruments liabilities (641) (1,890) (1,821)
End of hedging (before 2018) | Fair value hedge      
Hedging instruments and hedged items by hedging strategy      
Cumulative FVH adjustments included in the carrying amount of the hedged items liabilities $ 27 $ 21 $ 10