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PROPERTY, PLANT AND EQUIPMENT - Property, Plant and Equipment by Type (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment | $ 24,141 | $ 12,826
Additions | 2,188 | 5,127
Interest costs capitalized | 24 | 14
Acquisitions through business combinations, property, plant and equipment |  | 7,403
Disposals | (37) | (22)
Depreciation | (2,365) | (2,014)
Impairment reversals | 677 | (1,423)
Transfers | 0 | 0
Decrease through classified as held for sale, property, plant and equipment |  | (356)
Property, plant and equipment | 24,628 | 24,141
Cost |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment | 61,862 | 50,984
Property, plant and equipment | 63,793 | 61,862
Accumulated depreciation and impairments |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment | (37,721) | (38,158)
Property, plant and equipment | (39,165) | (37,721)
Buildings, plant and equipment1 |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment | 7,753 | 3,600
Additions | 10 | 298
Interest costs capitalized | 0 | 0
Acquisitions through business combinations, property, plant and equipment |  | 3,473
Disposals | (24) | (22)
Depreciation | (1,219) | (1,107)
Impairment reversals | 260 | (990)
Transfers | 693 | 648
Decrease through classified as held for sale, property, plant and equipment |  | 0
Property, plant and equipment | 7,473 | 7,753
Buildings, plant and equipment1 | Cost |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment | 18,544 | 14,750
Property, plant and equipment | 18,361 | 18,544
Buildings, plant and equipment1 | Accumulated depreciation and impairments |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment | (10,791) | (11,150)
Property, plant and equipment | (10,888) | (10,791)
MIning property costs subject to depreciation |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment | 12,288 | 6,258
Additions | 259 | 3,458
Interest costs capitalized | 0 | 0
Acquisitions through business combinations, property, plant and equipment |  | 2,270
Disposals | (1) | 0
Depreciation | (1,146) | (907)
Impairment reversals | 412 | (742)
Transfers | 1,757 | 573
Decrease through classified as held for sale, property, plant and equipment |  | 0
Property, plant and equipment | 13,569 | 12,288
MIning property costs subject to depreciation | Cost |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment | 27,268 | 21,624
Property, plant and equipment | 29,901 | 27,268
MIning property costs subject to depreciation | Accumulated depreciation and impairments |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment | (14,980) | (15,366)
Property, plant and equipment | (16,332) | (14,980)
MIning property costs not subject to depreciation |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment | 4,100 | 2,968
Additions | 1,919 | 1,371
Interest costs capitalized | 24 | 14
Acquisitions through business combinations, property, plant and equipment |  | 1,660
Disposals | (12) | 0
Depreciation | 0 | 0
Impairment reversals | 5 | 309
Transfers | (2,450) | (1,221)
Decrease through classified as held for sale, property, plant and equipment |  | (356)
Property, plant and equipment | 3,586 | 4,100
MIning property costs not subject to depreciation | Cost |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment | 16,050 | 14,610
Property, plant and equipment | 15,531 | 16,050
MIning property costs not subject to depreciation | Accumulated depreciation and impairments |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Property, plant and equipment | (11,950) | (11,642)
Property, plant and equipment | $ (11,945) | (11,950)
KCGM [Member] |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Disposals |  | (260)
KCGM [Member] | Buildings, plant and equipment1 |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Disposals |  | (127)
KCGM [Member] | MIning property costs subject to depreciation |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Disposals |  | (106)
KCGM [Member] | MIning property costs not subject to depreciation |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Disposals |  | $ (27)

X
- Definition The increase in property, plant and equipment resulting from acquisitions 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 iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2019-en-r&anchor=para_73_e_iii&doctype=Standard -URIDate 2019-03-27 + Details
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- 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 decrease in property, plant and equipment through classification as held for sale or inclusion in a disposal group classified as held for sale. [Refer: Disposal groups classified as held for sale [member]; Property, plant and equipment; Disposal groups classified as held for sale [member]] + 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 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 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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