Condensed Financial Information of Parent - Condensed Statement of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net cash used in operating activities	$ 300	$ (131)	$ 2,178
Cash flows from investing activities:
Net cash provided by (used in) investing activities	(259)	(524)	177
Cash flows from financing activities:
Repurchase of restricted stock shares for payroll tax withholding requirements	(8)	(5)	(1)
Net cash provided by financing activities	(430)	(514)	(895)
Net change in cash and cash equivalents	(389)	(1,169)	1,460
Cash and cash equivalents at beginning of period	118	507	1,676	$ 216
Parent Company
Cash flows from operating activities:
Net cash used in operating activities	(13)	(11)	(12)
Cash flows from financing activities:
Repurchase of restricted stock shares for payroll tax withholding requirements	(8)	(5)	(1)
Changes in intercompany balances with affiliates, net	21	16	13
Net cash provided by financing activities	$ 13	$ 11	$ 12