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INCOME TAX EXPENSE - Schedule of Components of Income Tax Expense (Recovery) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Current tax
Current tax	$ 237	$ 222	$ 502	$ 474
Deferred tax
Deferred tax expense (income)	106	36	215	170
Income tax expense	$ 343	$ 258	$ 717	$ 644

X

- Definition

Deferred Tax Expense (Income) And Adjustments For Current Tax Of Prior Periods [Abstract]

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- Definition

The amount of income taxes payable (recoverable) in respect of the taxable profit (tax loss) for a period.

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The amount of tax expense (income) relating to changes in deferred tax liabilities and deferred tax assets. [Refer: Deferred tax assets; Deferred tax liabilities]

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The aggregate amount included in the determination of profit (loss) for the period in respect of current tax and deferred tax. [Refer: Current tax expense (income); Deferred tax expense (income)]

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