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Non-current and current financial debts - Maturity of borrowings (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Disclosure of detailed information about borrowings [line items]    
Borrowings $ 4,648 $ 4,080
Cost    
Disclosure of detailed information about borrowings [line items]    
Borrowings 4,690 4,107
Cost | Not later than one year    
Disclosure of detailed information about borrowings [line items]    
Borrowings 107 114
Cost | Between one and five years    
Disclosure of detailed information about borrowings [line items]    
Borrowings 500 1,743
Cost | Later than five years    
Disclosure of detailed information about borrowings [line items]    
Borrowings 4,083 2,250
Unamortized debt discount and issuance costs    
Disclosure of detailed information about borrowings [line items]    
Borrowings (42) (27)
Nominal amount - Current and non-current financial debt    
Disclosure of detailed information about borrowings [line items]    
Borrowings 4,638 4,073
Nominal amount - Current and non-current financial debt | Cost    
Disclosure of detailed information about borrowings [line items]    
Borrowings 4,680 4,100
Nominal amount - Current and non-current financial debt | Cost | Not later than one year    
Disclosure of detailed information about borrowings [line items]    
Borrowings 97 107
Nominal amount - Current and non-current financial debt | Cost | Between one and five years    
Disclosure of detailed information about borrowings [line items]    
Borrowings 500 1,743
Nominal amount - Current and non-current financial debt | Cost | Later than five years    
Disclosure of detailed information about borrowings [line items]    
Borrowings 4,083 2,250
Nominal amount - Current and non-current financial debt | Unamortized debt discount and issuance costs    
Disclosure of detailed information about borrowings [line items]    
Borrowings (42) (27)
Derivatives    
Disclosure of detailed information about borrowings [line items]    
Borrowings 10 7
Derivatives | Cost    
Disclosure of detailed information about borrowings [line items]    
Borrowings 10 7
Derivatives | Cost | Not later than one year    
Disclosure of detailed information about borrowings [line items]    
Borrowings 10 7
Derivatives | Cost | Between one and five years    
Disclosure of detailed information about borrowings [line items]    
Borrowings 0 0
Derivatives | Cost | Later than five years    
Disclosure of detailed information about borrowings [line items]    
Borrowings 0 0
Derivatives | Unamortized debt discount and issuance costs    
Disclosure of detailed information about borrowings [line items]    
Borrowings $ 0 $ 0