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Property, plant and equipment - Summary of property, plant and equipment (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2019
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Property, plant and equipment at beginning of period | $ 56,361 | $ 62,093 |  |
Adjustment for transition to new accounting standard |  |  |  | $ (31)
Restated opening balance |  |  |  | 56,330
Adjustment on currency translation | 426 | (4,157) |  |
Adjustments to capitalised closure costs | 840 | 486 |  |
Amounts capitalised | 321 | 296 | $ 224 |
Additions | 5,530 | 5,301 |  |
Depreciation for the year | (3,979) | (3,882) |  |
Impairment charges(b) | (3,476) | (130) |  |
Disposals | (72) | (130) |  |
Subsidiaries no longer consolidated |  | (3,386) |  |
Transfers and other movements | 387 | (130) |  |
Property, plant and equipment at end of period | 56,307 | 56,361 | 62,093 |
Finance leases under IAS 17 | 0 | 31 |  |
Property, plant and equipment, pledged as security | 12,758 | 13,221 |  |
Cost [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Property, plant and equipment at beginning of period | 104,294 |  |  |
Property, plant and equipment at end of period | 112,285 | 104,294 |  |
Accumulated amortisation and impairment [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Property, plant and equipment at beginning of period | (47,933) |  |  |
Property, plant and equipment at end of period | (55,978) | (47,933) |  |
Mining properties and leases [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Property, plant and equipment at beginning of period | 11,063 | 11,488 |  |
Restated opening balance |  |  |  | 11,063
Adjustment on currency translation | 27 | (689) |  |
Adjustments to capitalised closure costs | 840 | 486 |  |
Additions | 433 | 403 |  |
Depreciation for the year | (729) | (664) |  |
Impairment charges(b) | (1,339) | (3) |  |
Disposals | 0 | (1) |  |
Subsidiaries no longer consolidated |  | (1,103) |  |
Transfers and other movements | 107 | 1,146 |  |
Property, plant and equipment at end of period | 10,402 | 11,063 | 11,488 |
Property, plant and equipment, pledged as security | 1,805 | 3,054 |  |
Mining properties and leases [Member] | Cost [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Property, plant and equipment at beginning of period | 23,318 |  |  |
Property, plant and equipment at end of period | 24,875 | 23,318 |  |
Mining properties and leases [Member] | Accumulated amortisation and impairment [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Property, plant and equipment at beginning of period | (12,255) |  |  |
Property, plant and equipment at end of period | (14,473) | (12,255) |  |
Land and buildings [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Property, plant and equipment at beginning of period | 6,263 | 7,376 |  |
Restated opening balance |  |  |  | 6,263
Adjustment on currency translation | 72 | (548) |  |
Additions | 46 | 80 |  |
Depreciation for the year | (381) | (382) |  |
Impairment charges(b) | (96) | (20) |  |
Disposals | (9) | (54) |  |
Subsidiaries no longer consolidated |  | (377) |  |
Transfers and other movements | 508 | 188 |  |
Property, plant and equipment at end of period | 6,403 | 6,263 | 7,376 |
Property, plant and equipment, pledged as security | 571 | 385 |  |
Land and buildings [Member] | Cost [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Property, plant and equipment at beginning of period | 10,601 |  |  |
Property, plant and equipment at end of period | 11,517 | 10,601 |  |
Land and buildings [Member] | Accumulated amortisation and impairment [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Property, plant and equipment at beginning of period | (4,338) |  |  |
Property, plant and equipment at end of period | (5,114) | (4,338) |  |
Plant and equipment [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Property, plant and equipment at beginning of period | 32,019 | 36,285 |  |
Adjustment for transition to new accounting standard |  |  |  | (31)
Restated opening balance |  |  |  | 31,988
Adjustment on currency translation | 286 | (2,671) |  |
Additions | 616 | 459 |  |
Depreciation for the year | (2,869) | (2,836) |  |
Impairment charges(b) | (1,115) | (101) |  |
Disposals | (44) | (71) |  |
Subsidiaries no longer consolidated |  | (1,392) |  |
Transfers and other movements | 2,629 | 2,346 |  |
Property, plant and equipment at end of period | 31,491 | 32,019 | 36,285 |
Finance leases under IAS 17 |  | 31 |  |
Property, plant and equipment, pledged as security | 5,111 | 5,194 |  |
Plant and equipment [Member] | Cost [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Property, plant and equipment at beginning of period | 63,051 |  |  |
Property, plant and equipment at end of period | 66,705 | 63,051 |  |
Plant and equipment [Member] | Accumulated amortisation and impairment [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Property, plant and equipment at beginning of period | (31,032) |  |  |
Property, plant and equipment at end of period | (35,214) | (31,032) |  |
Capital works in progress [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Property, plant and equipment at beginning of period | 7,016 | 6,944 |  |
Restated opening balance |  |  |  | $ 7,016
Adjustment on currency translation | 41 | (249) |  |
Amounts capitalised | 321 | 296 |  |
Additions | 4,435 | 4,359 |  |
Depreciation for the year | 0 |  |  |
Impairment charges(b) | (926) | (6) |  |
Disposals | (19) | (4) |  |
Subsidiaries no longer consolidated |  | (514) |  |
Transfers and other movements | (2,857) | (3,810) |  |
Property, plant and equipment at end of period | 8,011 | 7,016 | $ 6,944 |
Property, plant and equipment, pledged as security | 5,271 | 4,588 |  |
Capital works in progress [Member] | Cost [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Property, plant and equipment at beginning of period | 7,324 |  |  |
Property, plant and equipment at end of period | 9,188 | 7,324 |  |
Capital works in progress [Member] | Accumulated amortisation and impairment [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Property, plant and equipment at beginning of period | (308) |  |  |
Property, plant and equipment at end of period | $ (1,177) | $ (308) |  |

X
- Definition The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2019-01-01 -Paragraph 73 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_73_e_i&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of interest and other costs that an entity incurs in connection with the borrowing of funds that are directly attributable to the acquisition, construction or production of a qualifying asset and which form part of the cost of that asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 23 -IssueDate 2019-01-01 -Paragraph 26 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=23&code=ifrs-tx-2019-en-r&anchor=para_26_a&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The increase (decrease) in property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2019-01-01 -Paragraph 73 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_73_e&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The decrease in property, plant and equipment resulting from the loss of control of a subsidiary. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 16 -IssueDate 2019-01-01 -Paragraph 73 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_73_e&doctype=Standard -URIDate 2019-03-27 + Details
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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 2019-01-01 -Paragraph 73 -Subparagraph e -Clause vii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_73_e_vii&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2019-01-01 -Paragraph 75 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_75_a&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 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 2019-01-01 -Paragraph 73 -Subparagraph e -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_73_e_ii&doctype=Standard -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph 73 -Subparagraph e -Clause v -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_73_e_v&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 98 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_98_a&doctype=Standard -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph 73 -Subparagraph e -Clause viii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_73_e_viii&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The increase (decrease) in property, plant and equipment resulting from transfers and changes that the entity does not separately disclose in the same statement or note. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 16 -IssueDate 2019-01-01 -Paragraph 73 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_73_e&doctype=Standard -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph 73 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_73_e&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 54 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_a&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of property, plant and equipment pledged as security for liabilities. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2019-01-01 -Paragraph 74 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_74_a&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Adjustment For Transition To New Accounting Standards, Property, Plant, And Equipment + References No definition available. + Details
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