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Property, Plant and Equipment - Additional Information (Detail)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2020
USD ($)
Jun. 30, 2020
USD ($)
Sep. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
well
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Disclosure of detailed information about property, plant and equipment [line items]            
Rate of capitalization       8.19% 8.47% 9.70%
Amount capitalized       $ 12 $ 11 $ 12
Exploratory wells under assessment | well       23    
0 to 1 year [member]            
Disclosure of detailed information about property, plant and equipment [line items]            
Discount rate after taxes of the CGU Gas - Neuquina 12.85%     14.80%   12.85%
1 - 2 year [member]            
Disclosure of detailed information about property, plant and equipment [line items]            
Discount rate after taxes of the CGU Gas - Neuquina 13.12%       14.08% 13.12%
Greater than a year [Member]            
Disclosure of detailed information about property, plant and equipment [line items]            
Exploratory wells under assessment | well       0    
CGU Gas Neuquina Basin [member]            
Disclosure of detailed information about property, plant and equipment [line items]            
Impairment loss   $ 699        
Impairment Loss Recognised In Profit Or Loss Property Plant And Equipment,Net of tax $ 522 524        
Book value of the net assets       $ 2,585 $ 2,435  
Reversal in the charge of impairment 696     0    
Recoverable value after taxes 2,287         $ 2,287
CGU Gas Austral Basin [member]            
Disclosure of detailed information about property, plant and equipment [line items]            
Impairment loss   115 $ 98 25 97  
Impairment Loss Recognised In Profit Or Loss Property Plant And Equipment,Net of tax 68 $ 86 $ 64 16 63  
Reversal in the charge of impairment 91          
Recoverable value after taxes $ 191     $ 65 $ 135 $ 191