Advances and Other Receivables - Schedule of Accounts Receivable (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Receivables [Abstract]
Servicing advances, net of $6 and $13 purchase discount, respectively	$ 1,410	$ 1,065
Receivables from agencies, investors and prior servicers, net of zero and $6 purchase discount, respectively	47	101
Reserves	(112)	(170)
Total advances and other receivables, net	1,345	996
Servicing advances discount	6	13	$ 12
Receivable discount	$ 0	$ 6	$ 7