v3.25.4
FINANCING AND FINANCIAL INSTRUMENTS - Risk management policy - Cash Flow Hedges (Details) - Cash flow hedges - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial liabilities held for hedging $ (18) $ 133  
Reserve of cash flow hedges 959 956  
Derivative contract, equity method investments      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Reserve of cash flow hedges 185 365 $ 417
3 months and less      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial assets held for hedging (22) 1  
Reserve of cash flow hedges (11) 31  
3-6 months      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial liabilities held for hedging (4) 12  
Reserve of cash flow hedges 9 35  
6-12 months      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial liabilities held for hedging 4 15  
Reserve of cash flow hedges 102 77  
Later than one year and not later than two years      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial liabilities held for hedging 10 76  
Reserve of cash flow hedges 282 58  
More than 2 years      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial liabilities held for hedging (6) 31  
Reserve of cash flow hedges 577 755  
Foreign exchange contracts      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial liabilities held for hedging (1) (194)  
Reserve of cash flow hedges (57) (184)  
Foreign exchange contracts | 3 months and less      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial liabilities held for hedging 9 (10)  
Reserve of cash flow hedges (2) (9)  
Foreign exchange contracts | 3-6 months      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial liabilities held for hedging 5 (12)  
Reserve of cash flow hedges 3 (9)  
Foreign exchange contracts | 6-12 months      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial liabilities held for hedging 0 (23)  
Reserve of cash flow hedges 1 (18)  
Foreign exchange contracts | Later than one year and not later than two years      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial liabilities held for hedging (15) 60  
Reserve of cash flow hedges (17) (59)  
Foreign exchange contracts | More than 2 years      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial liabilities held for hedging 0 89  
Reserve of cash flow hedges (42) (89)  
Commodities      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial assets held for hedging (17) 61  
Reserve of cash flow hedges 63 296  
Commodities | 3 months and less      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial assets held for hedging (31) 11  
Reserve of cash flow hedges (9) 40  
Commodities | 3-6 months      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial assets held for hedging (9) 0  
Reserve of cash flow hedges 6 44  
Commodities | 6-12 months      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial assets held for hedging 4 8  
Reserve of cash flow hedges 42 95  
Commodities | Later than one year and not later than two years      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial liabilities held for hedging 25 16  
Reserve of cash flow hedges 26 69  
Commodities | More than 2 years      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial assets held for hedging (6) 58  
Reserve of cash flow hedges (2) 48  
Emission rights      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial assets held for hedging 0 0  
Reserve of cash flow hedges 953 844  
Emission rights | 3 months and less      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial assets held for hedging 0 0  
Reserve of cash flow hedges 0 0  
Emission rights | 3-6 months      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial assets held for hedging 0 0  
Reserve of cash flow hedges 0 0  
Emission rights | 6-12 months      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial assets held for hedging 0 0  
Reserve of cash flow hedges 59 0  
Emission rights | Later than one year and not later than two years      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial assets held for hedging 0 0  
Reserve of cash flow hedges 273 48  
Emission rights | More than 2 years      
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]      
Derivative financial assets held for hedging 0 0  
Reserve of cash flow hedges $ 621 $ 796