Pensions - Actuarial losses and gains (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Actuarial losses and gains recognised directly in Other comprehensive income
Net actuarial (losses) gains recognised in OCI during the year	$ 3	$ 401	$ (282)
Actuarial (losses) gains related to currency effects on net obligation and foreign exchange translation	(109)	27	172
Tax effects of actuarial (losses) gains recognised in OCI	19	(98)	22
Items that will not be reclassified to the Consolidated statement of income	(87)	330	(88)
Cumulative actuarial (losses) gains recognised directly in OCI net of tax	$ (899)	$ (812)	$ (1,141)

No definition available.

Name:	eqnr_ActuarialLossesAndGainsRecognisedDirectlyInOtherComprehensiveIncomeAbstract
Namespace Prefix:	eqnr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The accumulated amount of net gain or (losses) relating to amounts recognised in other comprehensive income in relation to remeasurement of defined plans.

+ References

No definition available.

+ Details

Name:	eqnr_OtherComprehensiveIncomeAccumulatedGainLossRelatingToRemeasurementsOfDefinedPlans
Namespace Prefix:	eqnr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of net gain or (losses) relating to amounts recognised in other comprehensive income in relation to changes in foreign currency .

+ References

No definition available.

+ Details

Name:	eqnr_OtherComprehensiveIncomeBeforeTaxDefinedBenefitsGainLossesRelatedToChangesInCurrency
Namespace Prefix:	eqnr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of net gain or (losses) relating to amounts recognised in other comprehensive income in relation to remeasurements of defined benefit plans, excluding currency effects.

+ References

No definition available.

+ Details

Name:	eqnr_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlansExculdingCurrencyEffects
Namespace Prefix:	eqnr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of income tax relating to amounts recognised in other comprehensive income in relation to remeasurements of defined benefit plans. [Refer: Other comprehensive income; Reserve of remeasurements of defined benefit plans; Defined benefit plans [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2019-01-01
-Paragraph 81
-Subparagraph ab
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_ab&doctype=Standard
-URIDate 2019-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 90
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_90&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of other comprehensive income that will not be reclassified to profit or loss, net of tax. [Refer: Other comprehensive income]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph IG6
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_IG6&doctype=Implementation%20Guidance
-URIDate 2019-03-27

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 82A
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_82A&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration