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Impairment of Exploration and Evaluation and Oil and Gas Properties - Summary of Carrying Amount of Goodwill Allocated to CGUs (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Disclosure of information for cash-generating units [line items]    
Goodwill $ 4,614
WDS Australia Segment [Member] | WDS Pluto Scarborough [Member]    
Disclosure of information for cash-generating units [line items]    
Goodwill 2,955  
Excess of recoverable amount 7,656  
WDS Australia Segment [Member] | NWS Gas [Member]    
Disclosure of information for cash-generating units [line items]    
Goodwill 394  
Excess of recoverable amount 1,399  
WDS International Segment [Member] | WDS Shenzi [Member]    
Disclosure of information for cash-generating units [line items]    
Goodwill 469  
Excess of recoverable amount 401  
WDS International Segment [Member] | WDS Atlantis [Member]    
Disclosure of information for cash-generating units [line items]    
Goodwill 513  
Excess of recoverable amount 189  
WDS International Segment [Member] | Other [member]    
Disclosure of information for cash-generating units [line items]    
Goodwill 283  
Excess of recoverable amount $ 107