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Income Taxes - Net Deferred Tax Liabilities Presented on Consolidated Balance Sheet (Detail) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]    
Long-term deferred tax assets $ 300 $ 238
Long-term deferred tax liabilities (401) (322)
Net deferred tax liabilities $ (101) $ (84)