v3.25.4
FINANCING AND FINANCIAL INSTRUMENTS - Risk management policy - Foreign Currency Sensitivity Analysis (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Reasonably possible change in risk variable (in percent) 10.00%  
Emission rights    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Derivative financial assets (liabilities) $ 0  
Derivative notional amount   (2)
Currency risk | EUR    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
10% increase, trade receivables 89  
10% increase, trade payables 573  
10% decrease, trade receivables (89)  
10% decrease, trade payables (573)  
Currency risk | BRL    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
10% increase, trade receivables 84  
10% increase, trade payables 70  
10% decrease, trade receivables (84)  
10% decrease, trade payables (70)  
Currency risk | PLN    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
10% increase, trade receivables 19  
10% increase, trade payables 47  
10% decrease, trade receivables (19)  
10% decrease, trade payables (47)  
Currency risk | MAD    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
10% increase, trade receivables 19  
10% increase, trade payables 28  
10% decrease, trade receivables (19)  
10% decrease, trade payables (28)  
Currency risk | ZAR    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
10% increase, trade receivables 9  
10% increase, trade payables 39  
10% decrease, trade receivables (9)  
10% decrease, trade payables (39)  
Currency risk | CAD    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
10% increase, trade receivables 8  
10% increase, trade payables 37  
10% decrease, trade receivables (8)  
10% decrease, trade payables (37)  
Currency risk | ARS    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
10% increase, trade receivables 7  
10% increase, trade payables 7  
10% decrease, trade receivables (7)  
10% decrease, trade payables (7)  
Currency risk | UAH    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
10% increase, trade receivables 6  
10% increase, trade payables 8  
10% decrease, trade receivables (6)  
10% decrease, trade payables (8)  
Currency risk | GBP    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
10% increase, trade receivables 3  
10% increase, trade payables 11  
10% decrease, trade receivables (3)  
10% decrease, trade payables (11)  
Currency risk | MXN    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
10% increase, trade receivables 1  
10% increase, trade payables 9  
10% decrease, trade receivables (1)  
10% decrease, trade payables (9)  
Currency risk | Trade payables    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 13,008  
Currency risk | Trade payables | USD    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 4,559  
Currency risk | Trade payables | EUR    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 5,730  
Currency risk | Trade payables | BRL    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 701  
Currency risk | Trade payables | PLN    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 473  
Currency risk | Trade payables | MAD    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 277  
Currency risk | Trade payables | ZAR    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 387  
Currency risk | Trade payables | CAD    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 371  
Currency risk | Trade payables | ARS    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 68  
Currency risk | Trade payables | UAH    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 76  
Currency risk | Trade payables | GBP    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 108  
Currency risk | Trade payables | MXN    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 86  
Currency risk | Trade payables | Other    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 172  
Currency risk | Trade receivables    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 3,476  
Currency risk | Trade receivables | USD    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 934  
Currency risk | Trade receivables | EUR    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 887  
Currency risk | Trade receivables | BRL    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 837  
Currency risk | Trade receivables | PLN    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 189  
Currency risk | Trade receivables | MAD    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 189  
Currency risk | Trade receivables | ZAR    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 89  
Currency risk | Trade receivables | CAD    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 77  
Currency risk | Trade receivables | ARS    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 74  
Currency risk | Trade receivables | UAH    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 60  
Currency risk | Trade receivables | GBP    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 27  
Currency risk | Trade receivables | MXN    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic 12  
Currency risk | Trade receivables | Other    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Risk exposure associated with instruments sharing characteristic $ 101