v3.26.3
FINANCIAL INSTRUMENTS - Schedule of derivatives instruments performance (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Derivatives, Fair Value [Line Items]        
Unrealized (losses) / gains on derivatives - net $ 5 $ 13 $ (55) $ 34
Currency commercial derivatives | Derivatives that do not qualify for hedge accounting        
Derivatives, Fair Value [Line Items]        
Realized gains / (losses) on derivatives - net (3) 6 (3) 6
Unrealized (losses) / gains on derivatives - net (5) (6) (19) 32
Currency commercial derivatives | Derivatives that qualify for hedge accounting        
Derivatives, Fair Value [Line Items]        
Realized gains / (losses) on derivatives - net 0 2 3 (2)
Unrealized (losses) / gains on derivatives - net 0 1 (1) 4
Unrealized (losses) / gains on foreign currency derivatives - net (3) (2) (12) 35
(Losses) / gains reclassified from cash flow hedge reserve to the Consolidated Income Statement 0 (1) (2) (1)
Currency net debt derivatives | Derivatives that do not qualify for hedge accounting        
Derivatives, Fair Value [Line Items]        
Realized gains / (losses) on foreign currency derivatives - net 0 1 2 (24)
Unrealized gains / (losses) on foreign currency derivatives - net 2 0 1 (1)
Total 2 1 3 (25)
Commodity | Derivatives that do not qualify for hedge accounting        
Derivatives, Fair Value [Line Items]        
Realized gains / (losses) on derivatives - net 0 4 104 (15)
Unrealized (losses) / gains on derivatives - net $ 10 $ 19 $ (36) $ 2