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Income Taxes - Summary of Deferred Income Taxes Provided on Temporary Differences (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Income Tax Disclosure [Abstract] |  |
Tax depreciation in excess of book depreciation | $ 50 | $ 7
Tax on undistributed foreign earnings | 23 | 1
Change in valuation allowance on deferred tax assets | 6 | 1
Liabilities currently not deductible for tax | (2) | (43)
Book amortization (in excess of) less than tax amortization | (17) | 43
Net tax losses benefited | (38) | 29
Others | (5) | (31)
Deferred income tax, Total | $ 17 | $ 7

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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