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Impairment Of Exploration And Evaluation, Property, Plant And Equipment And Goodwill - Summary of Carrying Amount of Goodwill Allocated to CGUs (Detail) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure of information for cash-generating units [line items]    
Goodwill $ 3,866 $ 3,995
WDS Australia Segment [Member] | WDS Pluto Scarborough [Member]    
Disclosure of information for cash-generating units [line items]    
Goodwill 2,445 2,743
Excess of recoverable amount 4,514 3,051
WDS Australia Segment [Member] | NWS Gas [Member]    
Disclosure of information for cash-generating units [line items]    
Goodwill 442 442
Excess of recoverable amount 1,612 784
WDS International Segment [Member] | WDS Atlantis [Member]    
Disclosure of information for cash-generating units [line items]    
Goodwill 522 522
Excess of recoverable amount 98 338
WDS International Segment [Member] | Other goodwill [Member]    
Disclosure of information for cash-generating units [line items]    
Goodwill 288 288
Excess of recoverable amount 879 $ 1,176
WDS New Energy Corporate [Member] | Beaumont New Ammonia [Member]    
Disclosure of information for cash-generating units [line items]    
Goodwill 169  
Excess of recoverable amount $ 0