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DEFERRED INCOME TAXES - Expiry Dates of Tax Losses and AMT (Details) - Non-capital tax losses $ in Millions | Dec. 31, 2017 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 | $ 12,892
Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 2,093
Argentina |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 271
Barbados |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 6,614
Chile |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 1,052
Tanzania |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 1,756
Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 531
Other |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 575
2018 |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 4,849
2018 | 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
2018 | 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
2018 | Barbados |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 4,727
2018 | Chile |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 0
2018 | 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
2018 | Zambia |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 115
2018 | Other |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 7
2019 |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 922
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 | Barbados |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 922
2019 | Chile |
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 | 0
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 | 217
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 | Barbados |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 217
2020 | Chile |
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 | 0
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 | 296
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 | 271
2021 | Barbados |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 13
2021 | Chile |
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 | 12
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
After 2021 |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 3,232
After 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 | 2,093
After 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
After 2021 | Barbados |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 735
After 2021 | Chile |
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 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
After 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 | 404
After 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
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 | 3,376
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 | 0
No expiry date | Barbados |
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 | Chile |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Unused tax losses for which no deferred tax asset recognised | 1,052
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 | 1,756
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 | $ 568

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