Advances and Other Receivables - Schedule of Accounts Receivable (Details) - USD ($) $ in Millions	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Receivables [Abstract]
Servicing advances, net of $12 and $19 purchase discount, respectively	$ 854		$ 1,263
Receivables from agencies, investors and prior servicers, net of $7 and $12 purchase discount, respectively	120		132
Reserves	(143)		(167)
Total advances and other receivables, net	831		1,228
Servicing advances discount	12	$ 14	19	$ 30	$ 31	$ 72
Receivables discount	$ 7	$ 8	$ 12	$ 13	$ 20	$ 21