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Significant accounting policies (Details) $ in Billions | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($) $ / t kr / t
Significant accounting policies [Abstract] |
Internal carbon price | $ / t | 56
Expected tax increase on carbon emissions minimum | $ / t | 590
Expected tax increase on carbon emissions maximum | kr / t | 2,000
Expected cost increase from increase in CO2 tax | $ | $ 0.4
Reserve for exposure to market risks | $ | $ 3.0

X
- Definition The anticipated amount of cost increase from increase in CO2. + References No definition available. + Details
Name: | eqnr_ExpectedCostIncreaseFromIncreaseInCo2Tax
Namespace Prefix: | eqnr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of expected tax increase per tonne by the state government on carbon emissions per tonne, maximum amount. + References No definition available. + Details
Name: | eqnr_ExpectedTaxIncreaseOnCarbonEmissionsMaximumByGovernment
Namespace Prefix: | eqnr_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of expected tax increase per tonne by the state government on carbon emissions per tonne, minimum amount. + References No definition available. + Details
Name: | eqnr_ExpectedTaxIncreaseOnCarbonEmissionsMinimumByGovernment
Namespace Prefix: | eqnr_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition Entity's currently applied internal carbon price. + References No definition available. + Details
Name: | eqnr_InternalCarbonPrice
Namespace Prefix: | eqnr_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of reserves to mitigate the impact caused by events such as pandemics or commodity price risks. + References No definition available. + Details
Name: | eqnr_ReserveForExposureToMarketRisks
Namespace Prefix: | eqnr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | eqnr_SignificantAccountingPoliciesAbstract
Namespace Prefix: | eqnr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration