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Financial instruments - additional disclosures (Details 3) - Contract or underlying principal amout [member] - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Disclosure of derivative financial instruments [line items]    
Derivative financial instruments $ 8,043 $ 13,347
EUR    
Disclosure of derivative financial instruments [line items]    
Derivative financial instruments 767 1,485
USD    
Disclosure of derivative financial instruments [line items]    
Derivative financial instruments 5,715 5,257
Others    
Disclosure of derivative financial instruments [line items]    
Derivative financial instruments 1,561 6,605
Derivative financial instruments, at fair value currency related [member]    
Disclosure of derivative financial instruments [line items]    
Derivative financial instruments, forward foreign exchange rate contracts 7,907 13,248
Derivative financial instruments, commodity purchase contract 97 17
Derivative financial instruments, options on equity securities 39 82
Derivative financial instruments, at fair value currency related [member] | EUR    
Disclosure of derivative financial instruments [line items]    
Derivative financial instruments, forward foreign exchange rate contracts 687 1,485
Derivative financial instruments, commodity purchase contract 80  
Derivative financial instruments, at fair value currency related [member] | USD    
Disclosure of derivative financial instruments [line items]    
Derivative financial instruments, forward foreign exchange rate contracts 5,659 5,158
Derivative financial instruments, commodity purchase contract 17 17
Derivative financial instruments, options on equity securities 39 82
Derivative financial instruments, at fair value currency related [member] | Others    
Disclosure of derivative financial instruments [line items]    
Derivative financial instruments, forward foreign exchange rate contracts $ 1,561 $ 6,605