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Reversals (Impairments) of tangible and intangible assets and right-of-use assets - Main price assumptions for assessing the recoverability of oil & gas assets (Details)
 12 Months Ended
Dec. 31, 2023
$ / bbl
$ / MMBTU
2024  
Reversals (Impairments) of tangible and intangible assets and right-of-use assets  
Long-term price of the Brent crude oil benchmark | $ / bbl 73
Long-term gas price (in Dollars per Millions of BTU) | $ / MMBTU 8.7
2027  
Reversals (Impairments) of tangible and intangible assets and right-of-use assets  
Long-term price of the Brent crude oil benchmark | $ / bbl 68
Long-term gas price (in Dollars per Millions of BTU) | $ / MMBTU 9.9
2030  
Reversals (Impairments) of tangible and intangible assets and right-of-use assets  
Long-term price of the Brent crude oil benchmark | $ / bbl 68
Long-term gas price (in Dollars per Millions of BTU) | $ / MMBTU 6.8
2040  
Reversals (Impairments) of tangible and intangible assets and right-of-use assets  
Long-term price of the Brent crude oil benchmark | $ / bbl 58
Long-term gas price (in Dollars per Millions of BTU) | $ / MMBTU 6.8
2050  
Reversals (Impairments) of tangible and intangible assets and right-of-use assets  
Long-term price of the Brent crude oil benchmark | $ / bbl 48
Long-term gas price (in Dollars per Millions of BTU) | $ / MMBTU 6.2