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Income Taxes - Summary of Breakdown of Changes in Consolidated Deferred Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Changes in deferred tax liability (asset) [abstract]
Deferred income tax expense (revenue) in the income statement	$ (122)	$ 19	$ 125
Deferred income tax revenue in stockholders' equity	(41)	(59)	(10)
Reclassifications	(12)	3	3
Change in deferred income tax during the period	$ (175)	$ (37)	$ 118

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- References

No definition available.

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- Definition

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

+ References

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-Number 12
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- Definition

The amount of deferred tax related to items credited (charged) directly to equity. [Refer: Deferred tax expense (income)]

+ References

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-Number 12
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- Definition

The amount of income tax relating to amounts recognised in other comprehensive income. [Refer: Other comprehensive income]

+ References

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- Definition

The increase (decrease) in a deferred tax liability (asset). [Refer: Deferred tax liability (asset)]

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