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Financial risk and capital management - Credit risk exposure and grading (Details) - USD ($) $ in Millions | 12 Months Ended |
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Dec. 31, 2020 | Dec. 31, 2019
Disclosure of internal credit grades [line items] |  |
Description of internal credit ratings process | Prior to entering into transactions with new counterparties, Equinor’s credit policy requires all counterparties to be formally identified and assigned internal credit ratings. The internal credit ratings reflect Equinor’s assessment of the counterparties' credit risk and are based on a quantitative and qualitative analysis of recent financial statements and other relevant business. All counterparties are re-assessed regularly. |
Non-current financial receivable [Member] |  |
Disclosure of internal credit grades [line items] |  |
Financial assets subject to credit exposure | $ 497 | $ 1,057
Trade and other receivables [member] |  |
Disclosure of internal credit grades [line items] |  |
Financial assets subject to credit exposure | 7,418 | 7,374
Reclassification of credit exposure |  | 2,368
Non-current derivative financial instruments [Member] |  |
Disclosure of internal credit grades [line items] |  |
Financial assets subject to credit exposure | 2,476 | 1,365
Reclassification of credit exposure |  | 44
Current derivative financial instrument [Member] |  |
Disclosure of internal credit grades [line items] |  |
Financial assets subject to credit exposure | 886 | 578
Reclassification of credit exposure |  | 98
Investment grade, rated A or above [Member] | Non-current financial receivable [Member] |  |
Disclosure of internal credit grades [line items] |  |
Financial assets subject to credit exposure | 211 | 682
Investment grade, rated A or above [Member] | Trade and other receivables [member] |  |
Disclosure of internal credit grades [line items] |  |
Financial assets subject to credit exposure | 1,954 | 2,089
Investment grade, rated A or above [Member] | Non-current derivative financial instruments [Member] |  |
Disclosure of internal credit grades [line items] |  |
Financial assets subject to credit exposure | 1,850 | 962
Investment grade, rated A or above [Member] | Current derivative financial instrument [Member] |  |
Disclosure of internal credit grades [line items] |  |
Financial assets subject to credit exposure | 465 | 201
Other investment grade [Member] | Non-current financial receivable [Member] |  |
Disclosure of internal credit grades [line items] |  |
Financial assets subject to credit exposure | 24 | 80
Other investment grade [Member] | Trade and other receivables [member] |  |
Disclosure of internal credit grades [line items] |  |
Financial assets subject to credit exposure | 2,288 | 2,409
Other investment grade [Member] | Non-current derivative financial instruments [Member] |  |
Disclosure of internal credit grades [line items] |  |
Financial assets subject to credit exposure | 478 | 358
Other investment grade [Member] | Current derivative financial instrument [Member] |  |
Disclosure of internal credit grades [line items] |  |
Financial assets subject to credit exposure | 287 | 270
Non-investment grade or not rated [Member] | Non-current financial receivable [Member] |  |
Disclosure of internal credit grades [line items] |  |
Financial assets subject to credit exposure | 262 | 296
Non-investment grade or not rated [Member] | Trade and other receivables [member] |  |
Disclosure of internal credit grades [line items] |  |
Financial assets subject to credit exposure | 3,176 | 2,876
Non-investment grade or not rated [Member] | Non-current derivative financial instruments [Member] |  |
Disclosure of internal credit grades [line items] |  |
Financial assets subject to credit exposure | 148 | 44
Non-investment grade or not rated [Member] | Current derivative financial instrument [Member] |  |
Disclosure of internal credit grades [line items] |  |
Financial assets subject to credit exposure | $ 134 | $ 107

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- Definition The amount of exposure to loss resulting from credit risk. [Refer: Credit risk [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph IG24 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_IG24_a&doctype=Implementation%20Guidance&book=b -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph IG25 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_IG25_b&doctype=Implementation%20Guidance&book=b -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 36 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_36_c&doctype=Standard&book=b -URIDate 2019-03-27 + Details
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- Definition The description of the entity's process for internal credit ratings. [Refer: Internal credit grades [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph IG25 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_IG25_a&doctype=Implementation%20Guidance&book=b -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 36 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_36_c&doctype=Standard&book=b -URIDate 2019-03-27 + Details
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