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Provisions and other liabilities (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($)
Disclosure of other provisions and other liabilities [line items] |
Provisions and other liabilities at the beginning period | $ 19,163
Non-current portion - beginning period | 17,951
Current portion, reported as trade, other payables and provisions, beginning | 1,211
New or increased provisions and other liabilities | 873
Change in estimates | 214
Amounts charged against provisions and other liabilities | (394)
Effects of change in the discount rate | 1,569
Reduction due to divestments | 0
Accretion expenses | 572
Reclassification and transfer | (254)
Currency translation | 637
Provisions and other liabilities at ending period | 22,380
Non-current portion - ending period | 19,731
Current portion, reported as trade, other payables and provisions, ending | 2,649
Asset retirement obligations [Member] |
Disclosure of other provisions and other liabilities [line items] |
Provisions and other liabilities at the beginning period | 14,719
Non-current portion - beginning period | 14,616
Current portion, reported as trade, other payables and provisions, beginning | 104
New or increased provisions and other liabilities | 353
Change in estimates | 202
Amounts charged against provisions and other liabilities | (234)
Effects of change in the discount rate | 1,537
Reduction due to divestments | 0
Accretion expenses | 412
Reclassification and transfer | (282)
Currency translation | 584
Provisions and other liabilities at ending period | 17,292
Non-current portion - ending period | 17,200
Current portion, reported as trade, other payables and provisions, ending | 92
Claims and litigations [Member] |
Disclosure of other provisions and other liabilities [line items] |
Provisions and other liabilities at the beginning period | 965
Non-current portion - beginning period | 54
Current portion, reported as trade, other payables and provisions, beginning | 910
New or increased provisions and other liabilities | 81
Change in estimates | 22
Amounts charged against provisions and other liabilities | (15)
Reclassification and transfer | 0
Currency translation | 0
Provisions and other liabilities at ending period | 1,053
Non-current portion - ending period | 96
Current portion, reported as trade, other payables and provisions, ending | 958
Other provisions [Member] |
Disclosure of other provisions and other liabilities [line items] |
Provisions and other liabilities at the beginning period | 3,479
Non-current portion - beginning period | 3,282
Current portion, reported as trade, other payables and provisions, beginning | 197
New or increased provisions and other liabilities | 439
Change in estimates | (10)
Amounts charged against provisions and other liabilities | (145)
Effects of change in the discount rate | 32
Accretion expenses | 160
Reclassification and transfer | 28
Currency translation | 53
Provisions and other liabilities at ending period | 4,035
Non-current portion - ending period | 2,436
Current portion, reported as trade, other payables and provisions, ending | $ 1,600

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- Definition The amount of increase or (decrease) in estimate of other provisions. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The increase (decrease) in other provisions resulting from divestitures. + References No definition available. + Details
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- Definition The amount of current portion of provisions related to trade and other payables. + References No definition available. + Details
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- Definition The amount of additional other provisions made. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2019-01-01 -Paragraph 84 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2019-en-r&anchor=para_84_b&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The increase (decrease) in other provisions resulting from a change in discount rate. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2019-01-01 -Paragraph 84 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2019-en-r&anchor=para_84_e&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The increase (decrease) in other provisions resulting from foreign currency exchange rate changes on provisions measured in a currency different from the entity's presentation currency. [Refer: 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 increase in other provisions through adjustments arising from the passage of time. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2019-01-01 -Paragraph 84 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2019-en-r&anchor=para_84_e&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The increase (decrease) in other provisions resulting from transfers and changes that the entity does not separately disclose in the same statement or note. [Refer: 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 non-current provisions other than provisions for employee benefits. [Refer: Non-current provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 78 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_78_d&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of provisions other than provisions for employee benefits. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2019-01-01 -Paragraph 84 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2019-en-r&anchor=para_84_a&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 78 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_78_d&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount used (ie incurred and charged against the provision) for other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2019-01-01 -Paragraph 84 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2019-en-r&anchor=para_84_c&doctype=Standard -URIDate 2019-03-27 + Details
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