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Income Taxes - Schedule of Deferred Tax Assets and Liabilities By Report Caption (Detail) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Deferred Tax Assets Liabilities Net [Line Items] |  |
Long-term assets-deferred income taxes | $ 695 | $ 386
Long-term liabilities-deferred income taxes | (964) | (1,096)
Deferred tax assets liabilities net | $ (269) | $ (710)

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