Advances and Other Receivables - Purchase Discount (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Servicing Advances
Servicing Advances, Discount	$ 13	$ 12
Utilization of purchase discounts	(1)	(3)
Servicing Advances, Discount	12	9
Receivables from Agencies, Investors and Prior Servicers
Receivable with Imputed Interest, Discount	0	7
Utilization of Purchase Discount	(6)	0
Receivable with Imputed Interest, Discount	$ 6	$ 7

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
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482925/835-30-45-1A

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