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Related-party transactions (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of transactions between related parties [Line Items]      
Dividends from equity accounted units $ 1,067 $ 610 $ 879
Investments in equity accounted units 4,837 4,407  
Loans to equity accounted units 509 0  
Investment in equity accounted units      
Disclosure of transactions between related parties [Line Items]      
Purchases from equity accounted units (874) (1,163) (1,429)
Sales to equity accounted units 684 349 563
Dividends from equity accounted units 1,067 610 879
Net funding of equity accounted units (784) (144) (75)
Investments in equity accounted units 4,837 4,407 3,298
Loans to equity accounted units 534 0 0
Trade and other receivables: amounts due from equity accounted units 221 189 297
Trade and other payables: amounts due to equity accounted units (209) (206) (294)
Loans related to equity accounted units $ 0 $ 100 $ 0