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DEFERRED INCOME TAXES - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Tax on undistributed earnings | $ 16 |
Undistributed profits of foreign subsidiaries | 16,112 |
Deferred tax assets | 98 | $ 235
Deferred tax assets expected to be realized in more than one year | 43 |
Deferred tax liabilities | 3,034 | 3,091
Unused tax losses, net | 4,728 |
Deductible temporary differences for which no deferred tax asset is recognised | 3,053 | 3,161
Canada |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | 1,127 | 1,097
2021 |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax losses, net | 13 |
2022 |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax losses, net | 4 |
2023 |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax losses, net | 275 |
2024 |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax losses, net | 77 |
2025+ |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax losses, net | 2,830 |
No expiry date |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax losses, net | 1,529 |
Non-capital tax losses |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | 1,092 | 1,082
Capital tax losses | No expiry date |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | 323 | 331
Alternative minimum tax (“AMT”) credits |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax assets | 13 | 28
Other |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax assets | 3 | 11
Other | No expiry date |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | $ 1,638 | $ 1,748

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