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Segment Assets and Liabilities - Summary of Segment Assets and Liabilities (Detail) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure of operating segments [line items]    
Segment assets $ 61,264 $ 55,361
Segment liabilities 25,111 20,191
Australia Segment [Member]    
Disclosure of operating segments [line items]    
Segment assets 29,678 31,602
Segment liabilities 6,953 7,833
International [member]    
Disclosure of operating segments [line items]    
Segment assets 19,556 17,923
Segment liabilities 2,616 2,624
Marketing [member]    
Disclosure of operating segments [line items]    
Segment assets 754 835
Segment liabilities 1,115 751
New energy/Corporate [member]    
Disclosure of operating segments [line items]    
Segment assets 11,276 5,001
Segment liabilities $ 14,427 $ 8,983