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Acquisitions and disposals- Divestures (Details)
£ in Millions, $ in Millions
3 Months Ended 6 Months Ended
May 10, 2022
USD ($)
Feb. 10, 2022
GBP (£)
Feb. 10, 2022
USD ($)
Mar. 31, 2022
USD ($)
Dec. 31, 2021
Jun. 30, 2022
USD ($)
Equinor Energy Ireland Limited [Member] | Joint Operations [member]            
Divestments [table]            
Proportion of voting rights held in joint operation         36.50%  
Vermilion [Member] | Joint Operations [member]            
Divestments [table]            
Proportion of voting rights held in joint operation         20.00%  
Nephin Energy [Member] | Joint Operations [member]            
Divestments [table]            
Proportion of voting rights held in joint operation         43.50%  
Martin Linge [Member]            
Divestments [table]            
Proportion of voting rights held in joint operation 51.00%          
Dogger Bank C Project [member]            
Divestments [table]            
Ownership interest in joint venture   40.00% 40.00%      
Dogger Bank C Project [member] | REN (member)            
Divestments [table]            
Proportion of ownership interest divested   10.00% 10.00%      
Proceeds from divesture/sale   £ 68.0 $ 91      
Gain (loss ) on disposal of assets or discontinued operations   £ 65.0 $ 87      
Investments in Russia [member] | E&P International [member]            
Divestments [table]            
Impairment loss recognised in profit or loss       $ 1,083    
Investments in Russia [member] | E&P International [member] | Property, plant and equipment [member]            
Divestments [table]            
Impairment loss recognised in profit or loss       251    
Investments in Russia [member] | E&P International [member] | Investments accounted for using equity method [member]            
Divestments [table]            
Impairment loss recognised in profit or loss       $ 832    
Greater Ekofisk Area [member]            
Divestments [table]            
Proceeds from divesture/sale $ 1,000          
Greater Ekofisk Area [member] | Martin Linge [Member]            
Divestments [table]            
Proportion of ownership interest divested 19.00%          
Greater Ekofisk Area [member] | Norpipe Oil AS [Member]            
Divestments [table]            
Proportion of ownership interest divested 18.50%          
Corrib Gas Project In Ireland [member]            
Divestments [table]            
Proportion of ownership interest divested         100.00%  
Proceeds from divesture/sale           $ 434