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DEFERRED INCOME TAXES - Sources of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax assets | $ 98 | $ 235
Deferred tax liabilities | (3,034) | (3,091)
Deferred tax liability (asset) | 2,936 | 2,856
Before offset amount |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax assets | 930 | 978
Deferred tax liabilities | (2,936) | (2,856)
Tax loss carry forwards |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax assets | 456 | 511
Alternative minimum tax (“AMT”) credits |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax assets | 13 | 28
Environmental rehabilitation |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax assets | 358 | 329
Post-retirement benefit obligations and other employee benefits |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax assets | 30 | 24
Other working capital |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax assets | 70 | 75
Other |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax assets | 3 | 11
Property, plant and equipment |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liabilities | (3,375) | (3,263)
Inventory |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liabilities | (463) | (545)
Accrued interest payable |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax liabilities | $ (28) | $ (26)

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- Definition The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_g_i&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 o -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_o&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 56 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_56&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amounts of income taxes payable in future periods in respect of taxable temporary differences. [Refer: Temporary differences [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_g_i&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 o -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_o&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 56 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_56&doctype=Standard -URIDate 2019-03-27 + Details
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