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INCOME TAXES - Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	$ 990	$ 765
Temporary differences associated with investments in subsidiaries, associates and joint ventures for which deferred tax liabilities have not been recognised	2,441	2,867
Capital 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	332	433
Non-Capital 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	658	332
Non-Capital Losses \| Expire between 2022 to 2032
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	335	26
Non-Capital Losses \| Have no expiry dates
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	$ 306