Income Taxes - Schedule of Income Taxes (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income (loss) before income taxes	$ (105)	$ (177)	$ 114	$ (85)
Estimated annualized effective tax rate			(183.00%)	137.10%
Income tax benefit			$ (209)	$ (116)
Unfavorable tax impact related to losses in jurisdictions with no tax benefit			333	381
Discrete tax charge			1	1
Provision for income taxes	$ 45	$ 116	$ 125	$ 266