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Income taxes - Current and deferred (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income taxes
Current income taxes	$ (2,450)	$ (5,469)	$ (6,971)
Deferred income taxes	2,132	(403)	455
TOTAL INCOME TAXES	$ (318)	$ (5,872)	$ (6,516)

- Definition

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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