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Stockholders' Equity - Summary of Translation Effects of Foreign Subsidiaries Included in Statements of Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Exchange differences on translation [abstract]
Foreign currency translation result	$ 341	$ 88	$ (191)
Foreign exchange fluctuations from debt	(126)	19	120
Foreign exchange fluctuations from intercompany balances	(419)	(47)	(20)
Translation effects of foreign subsidiaries, net	$ (204)	$ 60	$ (91)

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Other comprehensive income net of tax change in exchange rates from intercompany balances.

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The gains (losses) recognised in other comprehensive income on exchange differences on the translation of financial statements of foreign operations, before tax. [Refer: Other comprehensive income]

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The amount of other comprehensive income, net of tax, related to exchange differences when financial statements of foreign operations are translated. [Refer: Other comprehensive income]

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