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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax [Line Items]
Income taxes (benefit)		$ (104)	$ (179)	$ (163)	$ (170)
Pre-tax income (loss)		$ (51)	$ (850)	$ (84)	$ (934)
Subsequent Event [Member]
Income Tax [Line Items]
Expected impairment of income tax benefit	$ 136
Israel Tax Authority [Member]
Income Tax [Line Items]
Statutory tax rate in Israel				23.00%

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Expected impairment of income tax benefit.

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

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