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v3.10.0.1

Income Taxes - Schedule of Defered Income Taxes (Parenthetical) (Detail) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Deferred Tax Assets Liabilities Net [Line Items] |  |
Unrecognized tax benefits | $ 35 | $ 26

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Period Type: | instant

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- Definition Deferred Tax Assets Liabilities Net [Line Items] + References No definition available. + Details
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