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Segments - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Disclosure of operating segments [table]        
Net impairment   $ (276) $ 245 $ 152
(Decrease) in non-current assets due to currency effect     (4,200)  
Interest rate effect on asset retirement obligation     $ 2,700  
Investments accounted for using equity method [member]        
Disclosure of operating segments [table]        
Net impairment $ 832      
Signature Bonuses And Acquisition Costs [member]        
Disclosure of operating segments [table]        
Net impairment   $ (113)    
Norway [member]        
Disclosure of operating segments [table]        
Percentage of entity's revenue 84.00% 76.00% 85.00% 78.00%
US [member}        
Disclosure of operating segments [table]        
Percentage of entity's revenue 14.00% 16.00% 12.00% 16.00%
E&P Norway [member]        
Disclosure of operating segments [table]        
Net impairment   $ (396)    
E&P International [member]        
Disclosure of operating segments [table]        
Net impairment   (93)    
MMP [member]        
Disclosure of operating segments [table]        
Net impairment   $ (185)