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Additional disclosure items G.2.1. Capital commitments (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Capital Commitments [Line Items]    
Capital commitments $ 406 $ 761
1 year    
Capital Commitments [Line Items]    
Capital commitments 259 428
Joint ventures    
Capital Commitments [Line Items]    
Capital commitments 29 $ 41
Joint ventures | 1 year    
Capital Commitments [Line Items]    
Capital commitments $ 29