Income Taxes - Carryforward and Temporary Differences (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Deferred Tax Assets
Goodwill and intangible assets	$ 585	$ 827
Loss reserves	101	84
Loss carryforwards (federal, state & capital)	85	104
Lease liability	22	28
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals	20	11
Depreciation and amortization, net	8	0
Other, net	12	19
Total deferred tax assets	833	1,073
Deferred Tax Liabilities
MSR amortization and mark-to-market, net	(282)	(269)
Other investment assets	(53)	(67)
Right-of-use assets	(18)	(24)
Depreciation and amortization, net	0	(2)
Prepaid assets	(1)	(1)
Total deferred tax liabilities	(354)	(363)
Valuation allowance	(7)	(7)
Deferred tax assets, net(1)	$ 472	$ 703