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DEFERRED INCOME TAXES - Expiry Dates of Tax Losses and AMT (Details) - Non-capital tax losses $ in Millions | Dec. 31, 2019 USD ($)
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Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | $ 7,636
Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 2,371
Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 50
Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 1,692
Argentina |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 992
Tanzania |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 1,566
Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 271
Other |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 694
2019 |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 12
2019 | Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2019 | Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2019 | Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2019 | Argentina |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2019 | Tanzania |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2019 | Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 12
2019 | Other |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2020 |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 309
2020 | Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2020 | Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 50
2020 | Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2020 | Argentina |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2020 | Tanzania |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2020 | Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 259
2020 | Other |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2021 |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2021 | Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2021 | Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2021 | Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2021 | Argentina |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2021 | Tanzania |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2021 | Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2021 | Other |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2022 |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 440
2022 | Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2022 | Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2022 | Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 440
2022 | Argentina |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2022 | Tanzania |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2022 | Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2022 | Other |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
After 2023 |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 3,623
After 2023 | Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 2,371
After 2023 | Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
After 2023 | Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 1,252
After 2023 | Argentina |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
After 2023 | Tanzania |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
After 2023 | Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
After 2023 | Other |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
No expiry date |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 3,252
No expiry date | Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
No expiry date | Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
No expiry date | Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
No expiry date | Argentina |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 992
No expiry date | Tanzania |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 1,566
No expiry date | Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
No expiry date | Other |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | $ 694

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