Income Taxes - Carryforward and Temporary Differences (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Deferred Tax Assets
Goodwill and intangible assets	$ 470	$ 585
Loss reserves	84	101
Loss carryforwards (federal, state & capital)	121	85
Lease liability	14	22
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals	15	20
Depreciation and amortization, net	10	8
Other, net	18	12
Total deferred tax assets	732	833
Deferred Tax Liabilities
MSR amortization and mark-to-market, net	(428)	(282)
Other investment assets	(53)	(53)
Right-of-use assets	(11)	(18)
Prepaid assets	0	(1)
Total deferred tax liabilities	(492)	(354)
Valuation allowance	(10)	(7)
Deferred tax assets, net(1)	$ 230	$ 472