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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, 2022
$ / MMBTU
$ / bbl
2023  
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 23.5
2025  
Reversals (Impairments) of tangible and intangible assets and right-of-use assets  
Long-term price of the Brent crude oil benchmark | $ / bbl 63
Long-term gas price (in Dollars per Millions of BTU) | $ / MMBTU 13.5
2030  
Reversals (Impairments) of tangible and intangible assets and right-of-use assets  
Long-term price of the Brent crude oil benchmark | $ / bbl 62
Long-term gas price (in Dollars per Millions of BTU) | $ / MMBTU 6
2040  
Reversals (Impairments) of tangible and intangible assets and right-of-use assets  
Long-term price of the Brent crude oil benchmark | $ / bbl 53
Long-term gas price (in Dollars per Millions of BTU) | $ / MMBTU 6
2050  
Reversals (Impairments) of tangible and intangible assets and right-of-use assets  
Long-term price of the Brent crude oil benchmark | $ / bbl 43
Long-term gas price (in Dollars per Millions of BTU) | $ / MMBTU 5.3