Income Taxes - Effective Income Tax Rate Reconciliation (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Statutory U.S. federal income tax provision (benefit)	$ 36	$ (94)	$ (306)
State income taxes, net of U.S. federal tax benefit	1	0	1
Foreign income tax expense, net	0	0	19
Change in deferred tax asset valuation allowance	4	(22)	71
Tax rate change	0	0	(7)
REIT income not subject to tax	(39)	116	221
Derecognition and remeasurement of deferred taxes	(2)	(1)	(35)
Recognized built-in gain tax	0	0	29
Other	0	3	1
Total provision (benefit) for income taxes	$ 0	$ 2	$ (6)