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Property, plant and equipment (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | $ 68,508 | $ 71,751
Property plant and equipment ending | 62,075 | 68,508
Assets transferred to Property, plant and equipment from Intangible assets | 1,730 | 89
Cost [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 215,587 | 209,221
Additions through business combinations | 4 |
Additions and transfers | 7,225 | 11,433
Disposals at cost | (4,420) | (295)
Assets reclassified to held for sale | (1,664) | (9,335)
Effect of changes in foreign exchange | (4,497) | 4,563
Property plant and equipment ending | 212,234 | 215,587
Cost [member] | As reported [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 212,751 | 207,422
Property plant and equipment ending |  | 212,751
Cost [member] | Impact of policy change [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 2,836 | 1,799
Property plant and equipment ending |  | 2,836
Cost [member] | As restated [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 215,587 |
Property plant and equipment ending |  | 215,587
Accumulated depreciation, amortisation and impairment [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | (147,079) | (137,469)
Assets reclassified to held for sale | 1,367 | 8,525
Depreciation | (10,408) | (9,488)
Impairment losses | (2,962) | (5,889)
Reversal of impairment losses | 1,677 | 218
Transfers | (11) | (10)
Accumulated depreciation and impairment disposed assets | 4,118 | 278
Effect of changes in foreign exchange | 3,138 | (3,244)
Property plant and equipment ending | (150,159) | (147,079)
Machinery, equipment and transportation equipment [Member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 209 |
Property plant and equipment ending | $ 147 | $ 209
Machinery, equipment and transportation equipment [Member] | Maximum [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Estimated useful lives (years) | 20 years | 20 years
Machinery, equipment and transportation equipment [Member] | Minimum [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Estimated useful lives (years) | 3 years | 3 years
Machinery, equipment and transportation equipment [Member] | Cost [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | $ 2,806 | $ 2,818
Additions through business combinations | 0 |
Additions and transfers | 39 | 68
Disposals at cost | (1,496) | (28)
Assets reclassified to held for sale | 0 | (66)
Effect of changes in foreign exchange | (13) | 13
Property plant and equipment ending | 1,335 | 2,806
Machinery, equipment and transportation equipment [Member] | Cost [member] | As reported [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 2,806 | 2,818
Property plant and equipment ending |  | 2,806
Machinery, equipment and transportation equipment [Member] | Cost [member] | Impact of policy change [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 0 | 0
Property plant and equipment ending |  | 0
Machinery, equipment and transportation equipment [Member] | Cost [member] | As restated [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 2,806 |
Property plant and equipment ending |  | 2,806
Machinery, equipment and transportation equipment [Member] | Accumulated depreciation, amortisation and impairment [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | (2,596) | (2,395)
Assets reclassified to held for sale | 0 | 65
Depreciation | (68) | (102)
Impairment losses | (42) | (201)
Reversal of impairment losses | 0 | 0
Transfers | 61 | 18
Accumulated depreciation and impairment disposed assets | 1,448 | 27
Effect of changes in foreign exchange | 9 | (9)
Property plant and equipment ending | (1,188) | (2,596)
Production plants and oil and gas assets [Member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 50,654 |
Property plant and equipment ending | 45,595 | 50,654
Production plants and oil and gas assets [Member] | Cost [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 183,082 | 180,825
Additions through business combinations | 2 |
Additions and transfers | 7,311 | 7,782
Disposals at cost | (1,975) | (243)
Assets reclassified to held for sale | (1,010) | (9,095)
Effect of changes in foreign exchange | (4,052) | 3,812
Property plant and equipment ending | 183,358 | 183,082
Production plants and oil and gas assets [Member] | Cost [member] | As reported [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 180,355 | 179,063
Property plant and equipment ending |  | 180,355
Production plants and oil and gas assets [Member] | Cost [member] | Impact of policy change [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 2,726 | 1,762
Property plant and equipment ending |  | 2,726
Production plants and oil and gas assets [Member] | Cost [member] | As restated [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 183,082 |
Property plant and equipment ending |  | 183,082
Production plants and oil and gas assets [Member] | Accumulated depreciation, amortisation and impairment [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | (132,427) | (125,327)
Assets reclassified to held for sale | 825 | 8,373
Depreciation | (9,136) | (8,240)
Impairment losses | (2,092) | (4,667)
Reversal of impairment losses | 1,675 | 218
Transfers | (1,319) | (68)
Accumulated depreciation and impairment disposed assets | 1,785 | 231
Effect of changes in foreign exchange | 2,926 | (2,947)
Property plant and equipment ending | (137,763) | (132,427)
Refining and manufacturing plants [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 1,232 |
Property plant and equipment ending | $ 555 | $ 1,232
Refining and manufacturing plants [member] | Maximum [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Estimated useful lives (years) | 20 years | 20 years
Refining and manufacturing plants [member] | Minimum [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Estimated useful lives (years) | 15 years | 15 years
Refining and manufacturing plants [member] | Cost [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | $ 9,238 | $ 8,920
Additions through business combinations | 0 |
Additions and transfers | 95 | 110
Disposals at cost | (70) | (7)
Assets reclassified to held for sale | (563) | 0
Effect of changes in foreign exchange | (220) | 214
Property plant and equipment ending | 8,481 | 9,238
Refining and manufacturing plants [member] | Cost [member] | As reported [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 9,238 | 8,920
Property plant and equipment ending |  | 9,238
Refining and manufacturing plants [member] | Cost [member] | Impact of policy change [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 0 | 0
Property plant and equipment ending |  | 0
Refining and manufacturing plants [member] | Cost [member] | As restated [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 9,238 |
Property plant and equipment ending |  | 9,238
Refining and manufacturing plants [member] | Accumulated depreciation, amortisation and impairment [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | (8,005) | (7,051)
Assets reclassified to held for sale | 461 | 0
Depreciation | (232) | (248)
Impairment losses | (401) | (516)
Reversal of impairment losses | 0 | 0
Transfers | 0 | (1)
Accumulated depreciation and impairment disposed assets | 59 | 7
Effect of changes in foreign exchange | 192 | (196)
Property plant and equipment ending | (7,926) | (8,005)
Buildings and land [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 405 |
Property plant and equipment ending | $ 276 | $ 405
Buildings and land [member] | Maximum [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Estimated useful lives (years) | 33 years | 33 years
Buildings and land [member] | Minimum [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Estimated useful lives (years) | 10 years | 20 years
Buildings and land [member] | Cost [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | $ 929 | $ 909
Additions through business combinations | 0 |
Additions and transfers | 27 | 27
Disposals at cost | (353) | 0
Assets reclassified to held for sale | 0 | (15)
Effect of changes in foreign exchange | (6) | 7
Property plant and equipment ending | 596 | 929
Buildings and land [member] | Cost [member] | As reported [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 929 | 909
Property plant and equipment ending |  | 929
Buildings and land [member] | Cost [member] | Impact of policy change [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 0 | 0
Property plant and equipment ending |  | 0
Buildings and land [member] | Cost [member] | As restated [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 929 |
Property plant and equipment ending |  | 929
Buildings and land [member] | Accumulated depreciation, amortisation and impairment [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | (524) | (475)
Assets reclassified to held for sale | 0 | 12
Depreciation | (42) | (23)
Impairment losses | (21) | (36)
Reversal of impairment losses | 0 | 0
Transfers | (61) | 0
Accumulated depreciation and impairment disposed assets | 326 | 0
Effect of changes in foreign exchange | 2 | (3)
Property plant and equipment ending | (320) | (524)
Assets under development [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 11,888 |
Property plant and equipment ending | 12,270 | 11,888
Assets under development [member] | Cost [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 13,163 | 10,408
Additions through business combinations | 1 |
Additions and transfers | (396) | 2,478
Disposals at cost | (25) | (5)
Assets reclassified to held for sale | 0 | (159)
Effect of changes in foreign exchange | (130) | 441
Property plant and equipment ending | 12,614 | 13,163
Assets under development [member] | Cost [member] | As reported [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 13,053 | 10,371
Property plant and equipment ending |  | 13,053
Assets under development [member] | Cost [member] | Impact of policy change [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 110 | 37
Property plant and equipment ending |  | 110
Assets under development [member] | Cost [member] | As restated [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 13,163 |
Property plant and equipment ending |  | 13,163
Assets under development [member] | Accumulated depreciation, amortisation and impairment [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | (1,275) | (892)
Assets reclassified to held for sale | 0 | 75
Depreciation | 0 | 0
Impairment losses | (390) | (445)
Reversal of impairment losses | 0 | 0
Transfers | 1,319 | 41
Accumulated depreciation and impairment disposed assets | 21 | 1
Effect of changes in foreign exchange | (18) | (56)
Property plant and equipment ending | (344) | (1,275)
Right of use assets [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 4,119 |
Property plant and equipment ending | $ 3,231 | $ 4,119
Right of use assets [member] | Maximum [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Estimated useful lives (years) | 20 years | 19 years
Right of use assets [member] | Minimum [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Estimated useful lives (years) | 1 year | 1 year
Right of use assets [member] | Cost [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | $ 6,370 | $ 5,339
Additions through business combinations | 0 |
Additions and transfers | 148 | 968
Disposals at cost | (501) | (13)
Assets reclassified to held for sale | (91) | 0
Effect of changes in foreign exchange | (77) | 75
Property plant and equipment ending | 5,850 | 6,370
Right of use assets [member] | Cost [member] | As reported [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 6,370 | 5,339
Property plant and equipment ending |  | 6,370
Right of use assets [member] | Cost [member] | Impact of policy change [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 0 | 0
Property plant and equipment ending |  | 0
Right of use assets [member] | Cost [member] | As restated [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | 6,370 |
Property plant and equipment ending |  | 6,370
Right of use assets [member] | Accumulated depreciation, amortisation and impairment [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Property plant and equipment beginning | (2,251) | (1,329)
Assets reclassified to held for sale | 82 | 0
Depreciation | (930) | (874)
Impairment losses | (17) | (25)
Reversal of impairment losses | 2 | 0
Transfers | (11) | 0
Accumulated depreciation and impairment disposed assets | 480 | 11
Effect of changes in foreign exchange | 27 | (35)
Property plant and equipment ending | $ (2,619) | $ (2,251)

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- Definition The amount of depreciation of property, plant and equipment. [Refer: Depreciation and amortisation expense; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2021-01-01 -Paragraph 73 -Subparagraph e -Clause vii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2021-en-r&anchor=para_73_e_vii&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2021-01-01 -Paragraph 75 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2021-en-r&anchor=para_75_a&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The decrease in property, plant and equipment resulting from disposals. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2021-01-01 -Paragraph 73 -Subparagraph e -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2021-en-r&anchor=para_73_e_ii&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Impairment loss recognised in profit or loss; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2021-01-01 -Paragraph 73 -Subparagraph e -Clause v -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2021-en-r&anchor=para_73_e_v&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 98 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_98_a&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The increase (decrease) in property, plant and equipment resulting from net exchange differences arising on the translation of the financial statements from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2021-01-01 -Paragraph 73 -Subparagraph e -Clause viii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2021-en-r&anchor=para_73_e_viii&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2021-01-01 -Paragraph 73 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2021-en-r&anchor=para_73_e&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 54 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_54_a&doctype=Standard -URIDate 2021-03-24 + Details
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