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Consequences of initiatives to limit climate changes (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) $ / t kr / t € / t | Dec. 31, 2020 USD ($) € / t
Climate changes [line items] |  |
Impairment exposure due to net zero emission | $ 9,000 |
Internal carbon price | $ / t | 58 |
External carbon price | € / t |  | 56
Expense related to carbon emissions and purchase | $ 428 | $ 268
Next two years [member] |  |
Climate changes [line items] |  |
External carbon price | € / t |  | 80
2030 and thereafter [member] |  |
Climate changes [line items] |  |
Internal carbon price | $ / t | 100 |
External carbon price | € / t | 65 | 27.5
Expected tax increase on carbon emissions maximum | kr / t | 2,000 |
2050 [member] |  |
Climate changes [line items] |  |
Impairment exposure due to net zero emission | $ 7,000 |
External carbon price | € / t | 100 | 41
Oil and Gas prospects, signature bonuses and the capitalised exploration costs [Member] |  |
Climate changes [line items] |  |
Total carrying value of intangible assets | $ 4,600 |
Asset retirement obligations [Member] |  |
Climate changes [line items] |  |
Increase in liability | $ 200 |

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