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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
IncomeTaxesLineItems [Line Items]
Income tax expense (benefit)	$ 9	$ 46
Effective Income Tax Rate Reconciliation, Percent	11.00%	4.00%
Pre-tax income (loss)	$ (84)	$ 1,254
Israel Tax Authority [Member]
IncomeTaxesLineItems [Line Items]
Statutory Israeli corporate tax rate	23.00%

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Income Taxes [Line Items]

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

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