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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
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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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- Definition 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] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 91 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_91_b&doctype=Standard -URIDate 2020-01-01 + Details
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