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Additional disclosure items G.3.2. Tax related risks and uncertain tax position (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure of other provisions [line items]    
Uncertain tax positions, remote risk 5.00%  
Uncertain tax positions, probable risk 50.00%  
Provision for taxes other than income tax    
Disclosure of other provisions [line items]    
Other provisions $ 54 $ 52
Tax contingent liability    
Disclosure of other provisions [line items]    
Estimated financial effect of contingent liabilities 304 279
Total for all joint ventures | Provision for taxes other than income tax    
Disclosure of other provisions [line items]    
Other provisions 8 7
Total for all joint ventures | Tax contingent liability    
Disclosure of other provisions [line items]    
Estimated financial effect of contingent liabilities $ 134 $ 118
Bottom of range    
Disclosure of other provisions [line items]    
Uncertain tax positions, possible risk 5.00%  
Top of range    
Disclosure of other provisions [line items]    
Uncertain tax positions, possible risk 50.00%