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Advances and Other Receivables - Purchase Discount (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Servicing Advances |  |  |  |
Servicing Advances, Discount | $ 12 | $ 9 | $ 13 | $ 12
Additions | (5) | (1) | (6) | (4)
Servicing Advances, Discount | 7 | 12 | 7 | 12
Receivables from Agencies, Investors and Prior Servicers |  |  |  |
Receivable with Imputed Interest, Discount | 0 | 7 | 0 | 7
Utilization of Purchase Discount | 0 | 0 | (6) | 0
Receivable with Imputed Interest, Discount | 0 | 7 | 6 | 7
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Servicing advances discount | 7 | 12 | 7 | 12
Receivables discount | 0 | 7 | 0 | 7
Accretion of Service Advances Discount | 5 | 1 | 6 | 4
Receivable Discount, Accretion Expense | $ 0 | 0 | $ 6 | 0
Home Point Capital Inc [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Addition to Servicing Advances Discount |  | $ 4 |  | $ 4

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