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Provisions - Additional Information (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Later than ten years [member]    
Disclosure Of Detailed Information About Provisions [Line Items]    
Percentage of proportion of noncurrent provision yet to be settled 54.00% 65.00%
Provision for decommissioning, restoration and rehabilitation costs [member] | Discount rate, measurement input [member]    
Disclosure Of Detailed Information About Provisions [Line Items]    
Percentage of pretax discount rates 0.50%  
Increase (decrease) in fair value measurement due to reasonably possible decrease in unobservable input, liabilities $ 316  
Percentage of reasonably possible increase in unobservable input, liabilities 10.00%  
Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input, liabilities $ 627  
Onerous contracts provision [member]    
Disclosure Of Detailed Information About Provisions [Line Items]    
Unused provision reversed, other provisions $ 0 $ 214
Contract term 18 years  
US government bond rate 4.10% 1.855%
Bottom of range [member] | Provision for decommissioning, restoration and rehabilitation costs [member] | Discount rate, measurement input [member]    
Disclosure Of Detailed Information About Provisions [Line Items]    
Significant unobservable input, liabilities 0.034 0.004
Top of range [member] | Provision for decommissioning, restoration and rehabilitation costs [member] | Discount rate, measurement input [member]    
Disclosure Of Detailed Information About Provisions [Line Items]    
Significant unobservable input, liabilities 0.047 0.024