Advances and Other Receivables - Schedule of Accounts Receivable (Details) - USD ($) $ in Millions	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Receivables [Abstract]
Servicing advances, net of $14 and $19 purchase discount, respectively	$ 915		$ 1,263
Receivables from agencies, investors and prior servicers, net of $8 and $12 purchase discount, respectively	127		132
Reserves	(150)		(167)
Total advances and other receivables, net	892		1,228
Servicing advances discount	14	$ 16	19	$ 26	$ 63	$ 72
Receivables discount	$ 8	$ 8	$ 12	$ 20	$ 20	$ 21