Income Taxes - Carryforward and Temporary Differences (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Deferred Tax Assets
Loss carryforwards (federal, state & capital)	$ 998,000,000	$ 1,334,000,000
Goodwill and intangible assets	364,000,000	4,000,000
Loss reserves	108,000,000	69,000,000
Reverse mortgage interests	44,000,000	70,000,000
Lease liability	32,000,000	1,000,000.000
Accruals	16,000,000	14,000,000
Restricted share based compensation	3,000,000	1,000,000
Partnership interests	1,000,000	7,000,000
Excess interest expense	0	10,000,000
Other, net	12,000,000	5,000,000
Total deferred tax assets	1,578,000,000	1,515,000,000
Deferred Tax Liabilities
MSR amortization and mark-to-market, net	(181,000,000)	(243,000,000)
Right-of-use assets	(29,000,000)	0
Depreciation and amortization, net	(12,000,000)	(12,000,000)
Prepaid assets	(2,000,000)	(1,000,000)
Total deferred tax liabilities	(224,000,000)	(256,000,000)
Valuation allowance	(9,000,000)	(295,000,000)
Net deferred tax assets	$ 1,345,000,000	$ 964,000,000