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Reversals (Impairments) of tangible and intangible assets and right-of-use assets. Sensitivity of outcomes to alternative scenarios - Additional Information (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Impairment review of tangible and intangible assets and right-of-use assets      
Risk-adjusted weighted average cost of capital (adjusted WACC) (in percent) 7.00%    
Net impairment losses € 1,140 € 167 € 3,183
Percentage by which headroom is higher than book value 100.00%    
Congo, Egypt, USA and Algeria      
Impairment review of tangible and intangible assets and right-of-use assets      
Net impairment losses € 432    
Chemicals      
Impairment review of tangible and intangible assets and right-of-use assets      
Property, plant and equipment, residual value 595    
Gas power generation      
Impairment review of tangible and intangible assets and right-of-use assets      
Property, plant and equipment, residual value € 690    
Minimum      
Impairment review of tangible and intangible assets and right-of-use assets      
Post-tax, risk-adjusted WACC (in percent) 6.20%    
Maximum      
Impairment review of tangible and intangible assets and right-of-use assets      
Post-tax, risk-adjusted WACC (in percent) 11.10%