Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Nov. 30, 2020	Mar. 31, 2021	Mar. 31, 2020
Income Tax [Line Items]
Expected impairment of income tax benefit	$ 140
Income tax expense (benefit)		$ 62	$ (59)
Pre-tax income (loss)		$ 144	$ (33)
Israel Tax Authority [Member]
Income Tax [Line Items]
Statutory tax rate in Israel		23.00%