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Acquisitions and disposals - acquisitions (Details) € in Millions |  | 1 Months Ended | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Aug. 30, 2019 USD ($) | Apr. 30, 2018 USD ($) | Sep. 30, 2020 | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2020 USD ($) | Sep. 30, 2019 USD ($) | Mar. 31, 2019 EUR (€) | Mar. 31, 2019 USD ($)
KrasGeoNaC [member] | E&P International [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of share acquired |  |  |  |  |  |  |  |  |  |  | 49.00% |  |  |
Total purchase price |  |  |  |  |  |  |  |  |  |  | $ 529,000,000 |  |  |
Cash consideration |  |  |  |  |  |  |  |  |  |  | 384,000,000 |  |  |
Contingent payments |  |  |  |  |  |  |  |  |  |  | $ 145,000,000 |  |  |
SPM Argentina S.A. [member] | Bandurria Sur [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest in joint venture |  |  |  |  | 49.00% |  |  |  |  |  |  |  |  |
SPM Argentina S.A. [member] | Shell [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of share acquired |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |
SPM Argentina S.A. [member] | E&P International [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of share acquired |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |
Total purchase price |  |  |  |  | $ 187,000,000 |  |  |  |  |  |  |  |  |
Bandurria Sur [member] | E&P International [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of share acquired |  |  |  | 5.50% |  |  |  |  |  |  |  |  |  |
Total purchase price |  |  |  | $ 44,000,000 |  |  |  |  |  |  |  |  |  |
Ownership interest in joint venture |  |  |  | 30.00% |  |  |  |  |  |  |  |  |  |
Rosebank project in UK [Member] | E&P International [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of share acquired |  |  |  |  |  |  |  |  |  |  |  |  | 40.00% | 40.00%
Cash consideration |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 71,000,000
Danske Commodities (DC) [Member] | Marketing, Midstream and Processing (MMP) [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of share acquired |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% | 100.00%
Cash consideration |  |  |  |  |  |  |  |  |  |  |  |  | € 465 | $ 535,000,000
Increase of Equinor's non-current assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,000,000
Increase in current assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 836,000,000
Increase in current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  | 749,000,000
Increase in deferred tax liability |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,000,000
Goodwill |  |  |  |  | $ 437,000,000 |  |  |  |  |  |  |  |  |
Lease OCS-A 0520 [Member] | Other segment [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 135,000,000
Swap of interests in the Norwegian Sea and the North Sea region [Member] | E&P- Norway [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration |  |  |  |  |  | $ 0 |  |  |  |  |  |  |  |
Increased assets |  |  |  |  |  | 280,000,000 |  |  |  |  |  |  |  |
Increased liabilities |  |  |  |  |  | 97,000,000 |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | $ 82,000,000 |  |  |  |  |  |  |  |
BM-S-8 license [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest in associate |  |  |  |  |  |  |  |  | 76.00% |  |  |  |  |
BM-S-8 license [member] | E&P International [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of share acquired |  |  |  |  |  | 10.00% |  |  |  | 66.00% |  |  |  |
Total purchase price |  |  |  |  |  | $ 415,000,000 |  |  |  |  |  |  |  |
Increase in intangible assets |  |  |  | $ 146,000,000 |  |  |  |  |  | $ 2,271,000,000 |  |  |  |
Portion of consideration in cash paid (received) |  |  |  | $ 101,000,000 |  |  |  |  |  |  |  |  |  |
Caesar Tonga field in the Gulf of Mexico [Member] | E&P International [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of share acquired |  |  |  |  |  |  |  |  |  |  |  | 22.45% |  |
Cash consideration |  |  |  |  |  |  |  |  |  |  |  | $ 813,000,000 |  |
Increased assets |  |  |  |  |  |  |  |  |  |  |  | 850,000,000 |  |
Increased liabilities |  |  |  |  |  |  |  |  |  |  |  | 37,000,000 |  |
Caesar Tonga field in the Gulf of Mexico [Member] | E&P International [member] | Maximum (%) [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest in joint operation |  |  | 23.55% |  |  |  |  |  |  |  |  |  |  |
Caesar Tonga field in the Gulf of Mexico [Member] | E&P International [member] | Minimum (%) [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest in joint operation |  |  | 46.00% |  |  |  |  |  |  |  |  |  |  |
Johan Sverdrup field [Member] | E&P- Norway [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of share acquired | 2.60% |  |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price |  |  |  |  |  |  |  |  |  |  |  | $ 981,000,000 |  |
Increase in deferred tax liability | $ 612,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Increased assets | 1,580,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | 612,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in other assets | $ 13,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Martin Linge field and Garantiana discovery [Member] | E&P- Norway [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price |  |  |  |  |  |  |  | $ 1,541,000,000 |  |  |  |  |  |
Increase in deferred tax liability |  |  |  |  |  |  |  | 265,000,000 |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  | 265,000,000 |  |  |  |  |  |
Increase in intangible assets |  |  |  |  |  |  |  | 116,000,000 |  |  |  |  |  |
Increase in other assets |  |  |  |  |  |  |  | 7,000,000 |  |  |  |  |  |
Increase in property plant and equipment resulting from business combination |  |  |  |  |  |  |  | 1,418,000,000 |  |  |  |  |  |
Cobalt's North Platte interest in the Gulf of Mexico [Member] | E&P International [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in intangible assets |  | $ 246,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Contingent payments |  |  |  |  |  |  |  | 20,000,000 |  |  |  |  |  |
Cobalt's North Platte interest in the Gulf of Mexico [Member] | E&P International [member] | Total operator [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest in joint operation |  | 60.00% |  |  |  |  |  |  |  |  |  |  |  |
Cobalt's North Platte interest in the Gulf of Mexico [Member] | E&P International [member] | Equinor and Total [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price |  |  |  |  |  |  |  | $ 339,000,000 |  |  |  |  |  |
Cobalt's North Platte interest in the Gulf of Mexico [Member] | E&P International [member] | Equinor [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest in joint operation |  | 40.00% |  |  |  |  |  |  |  |  |  |  |  |
Roncador field [Member] | E&P International [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of share acquired |  |  |  |  |  |  | 25.00% |  |  |  |  |  |  |
Cash consideration |  |  |  |  |  |  | $ 2,133,000,000 |  |  |  |  |  |  |
Increase in intangible assets |  |  |  |  |  |  | 392,000,000 |  |  |  |  |  |  |
Increase in property plant and equipment resulting from business combination |  |  |  |  |  |  | 2,550,000,000 |  |  |  |  |  |  |
Increase in provisions |  |  |  |  |  |  | 808,000,000 |  |  |  |  |  |  |
Contingent payments |  |  |  |  |  |  | $ 392,000,000 |  |  |  |  |  |  |
QGEP [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of share acquired |  |  |  |  |  |  |  |  | 10.00% |  |  |  |  |
Increase in intangible assets |  |  |  |  |  |  |  |  | $ 362,000,000 |  |  |  |  |
The Carcara North block [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bid in percentage of profit oil |  |  |  |  |  |  |  |  | 67.12% |  |  |  |  |
Signature bonus |  |  |  |  |  |  |  |  | $ 350,000,000 |  |  |  |  |
The Carcara North block [Member] | ExxonMobil [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bid in percentage of profit oil |  |  |  |  |  |  |  |  | 40.00% |  |  |  |  |
The Carcara North block [Member] | Galp [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bid in percentage of profit oil |  |  |  |  |  |  |  |  | 20.00% |  |  |  |  |
The Carcara North block [Member] | Equinor [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bid in percentage of profit oil |  |  |  |  |  |  |  |  | 40.00% |  |  |  |  |
The Martin Linge field [Member] | E&P- Norway [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of share acquired |  |  |  |  |  |  |  | 51.00% |  |  |  |  |  |
The Martin Linge field [Member] | E&P- Norway [member] | Maximum (%) [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest in associate |  |  |  |  |  |  |  | 70.00% |  |  |  |  |  |
The Martin Linge field [Member] | E&P- Norway [member] | Minimum (%) [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest in associate |  |  |  |  |  |  |  | 19.00% |  |  |  |  |  |
Garantiana discovery [Member] | E&P- Norway [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisitions [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of share acquired |  |  |  |  |  |  |  | 40.00% |  |  |  |  |  |

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- Definition The fair value, at acquisition date, of the consideration transferred in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B64 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B64_f&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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- Definition The increase in other provisions resulting from acquisitions through business combinations. [Refer: Business combinations [member]; Other provisions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 37 -IssueDate 2019-01-01 -Paragraph 84 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2019-en-r&anchor=para_84&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of additional goodwill recognised, except goodwill included in a disposal group that, on acquisition, meets the criteria to be classified as held for sale in accordance with IFRS 5. [Refer: Goodwill; Disposal groups classified as held for sale [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B67 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B67_d_ii&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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- Definition The fair value, at acquisition date, of cash transferred as consideration in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B64 -Subparagraph f -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B64_f_i&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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- Definition The amount recognised as of the acquisition date for current assets acquired in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B64 -Subparagraph i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B64_i&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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- Definition The fair value, at acquisition date, of liabilities incurred (for example, a liability for contingent consideration) as consideration transferred in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B64 -Subparagraph f -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B64_f_iii&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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