Income Taxes - Effective Income Tax Rate Reconciliation (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Statutory U.S. federal income tax provision (benefit)	$ 30	$ 36	$ (94)
State income taxes, net of U.S. federal tax benefit	29	1	0
Change in deferred tax asset valuation allowance	0	4	(22)
REIT income not subject to tax	(23)	(39)	116
Derecognition and remeasurement of deferred taxes	0	(2)	(1)
Other	2	0	3
Total provision for income taxes	$ 38	$ 0	$ 2