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DEFERRED INCOME TAXES - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Undistributed profits of foreign subsidiaries | $ 16,470 |
Deferred tax assets | 235 | $ 259
Deferred tax assets expected to be realized in more than one year | 218 |
Deferred tax liabilities | 3,091 | 1,236
Unused tax losses, net | 6,037 |
Deductible temporary differences for which no deferred tax asset is recognised | 2,875 | 3,043
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 | 1,097 | 1,087
2020 |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax losses, net | 128 |
2022 |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax losses, net | 440 |
After 2023 |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax losses, net | 3,623 |
No expiry date |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax losses, net | 1,846 |
Subsidiaries |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Tax on undistributed earnings | 33 |
Subsidiaries | Foreign countries [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax assets | 53 | 83
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 | 1,058 | 1,134
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 | 331 | 447
Alternative minimum tax (“AMT”) credits |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax assets | 28 | 37
Other |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deferred tax assets | 11 | 12
Deductible temporary differences for which no deferred tax asset is recognised | $ 1,486 | $ 1,462

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