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Income Taxes - Summary of Income Tax Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Major components of tax expense (income) [abstract]
Current income tax expense	$ 174	$ 143	$ 99
Deferred income tax expense (revenue)	(122)	19	125
Effective consolidated income tax expense rate	$ 52	$ 162	$ 224

- 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)]

+ References + Details