Advances and Other Receivables - Schedule of Accounts Receivable (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Receivables [Abstract]
Servicing advances, net of $9 and $12 purchase discount, respectively	$ 970	$ 1,053
Receivables from agencies, investors and prior servicers, net of $7 purchase discount	111	103
Reserves	(148)	(137)
Total advances and other receivables, net	933	1,019
Servicing advances discount	9	12	$ 16	$ 19
Receivables discount	$ 7	$ 7	$ 8	$ 12

Disclosure of the unamortized amount of the discount on the note or receivable which is deducted from the face amount of the receivable or loan. The discount or premium is the difference between the present value and the face amount.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28541-108399

Name:	us-gaap_ReceivableWithImputedInterestDiscount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant