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Capital structure and financing - C.3.4. Guarantees and pledged assets (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure of contingent liabilities [line items]    
Pledged deposits $ 0 $ 6
Bank and financing guarantees    
Disclosure of contingent liabilities [line items]    
Estimated financial effect of contingent liabilities 232 505
Supplier guarantees    
Disclosure of contingent liabilities [line items]    
Estimated financial effect of contingent liabilities 0 1
Within one year | Bank and financing guarantees    
Disclosure of contingent liabilities [line items]    
Estimated financial effect of contingent liabilities 12 15
Within one year | Supplier guarantees    
Disclosure of contingent liabilities [line items]    
Estimated financial effect of contingent liabilities 0 1
1-3 years | Bank and financing guarantees    
Disclosure of contingent liabilities [line items]    
Estimated financial effect of contingent liabilities 220 322
1-3 years | Supplier guarantees    
Disclosure of contingent liabilities [line items]    
Estimated financial effect of contingent liabilities 0 0
3-5 years | Bank and financing guarantees    
Disclosure of contingent liabilities [line items]    
Estimated financial effect of contingent liabilities 0 169
3-5 years | Supplier guarantees    
Disclosure of contingent liabilities [line items]    
Estimated financial effect of contingent liabilities $ 0 $ 0