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Income Taxes - Schedule of the Provision for Income Taxes (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Before Income Taxes And Income Tax Expense Benefit [Line Items]      
In Israel $ 60 $ 107 $ 131
Outside Israel (228) (385) (326)
Effective consolidated income taxes (168) (278) (195)
Current 182 885 700
Deferred (350) (1,163) (895)
Income tax expense (benefit) $ (168) $ (278) $ (195)