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Expected Loss to be Paid (Recovered) - Key Assumptions in Base Scenario Expected Loss First Lien RMBS (Details) - RMBS - United States | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023
Schedule of Expected Losses to be Paid [Line Items] |  |  |
Loss severity on future defaults |  |  | 50.00%
Base Scenario | First Lien |  |  |
Schedule of Expected Losses to be Paid [Line Items] |  |  |
Percent of deferred loan balances to be recovered | 50.00% | 30.00% | 30.00%
Home Equity Line of Credit |  |  |
Schedule of Expected Losses to be Paid [Line Items] |  |  |
Loss severity on future defaults | 98.00% |  | 98.00%
Projected future recoveries on previously charged-off loans | 50.00% |  | 40.00%
Current but recently delinquent | Home Equity Line of Credit |  |  |
Schedule of Expected Losses to be Paid [Line Items] |  |  |
Liquidation rate | 20.00% |  | 20.00%
30 – 59 Days Delinquent | Home Equity Line of Credit |  |  |
Schedule of Expected Losses to be Paid [Line Items] |  |  |
Liquidation rate | 30.00% |  | 30.00%
60 – 89 Days Delinquent | Home Equity Line of Credit |  |  |
Schedule of Expected Losses to be Paid [Line Items] |  |  |
Liquidation rate | 30.00% |  | 40.00%
90+ Days Delinquent | Home Equity Line of Credit |  |  |
Schedule of Expected Losses to be Paid [Line Items] |  |  |
Liquidation rate | 40.00% |  | 60.00%
Bankruptcy | Home Equity Line of Credit |  |  |
Schedule of Expected Losses to be Paid [Line Items] |  |  |
Liquidation rate | 55.00% |  | 55.00%
Foreclosure | Home Equity Line of Credit |  |  |
Schedule of Expected Losses to be Paid [Line Items] |  |  |
Liquidation rate | 40.00% |  | 55.00%
Real Estate Owned | Home Equity Line of Credit |  |  |
Schedule of Expected Losses to be Paid [Line Items] |  |  |
Liquidation rate | 100.00% |  | 100.00%
Minimum |  |  |
Schedule of Expected Losses to be Paid [Line Items] |  |  |
Plateau CDR | 0.00% |  | 0.00%
Final CDR | 0.00% |  | 0.00%
Loss severity on future defaults | 40.00% |  |
Minimum | Home Equity Line of Credit |  |  |
Schedule of Expected Losses to be Paid [Line Items] |  |  |
Plateau CDR | 0.40% |  | 0.00%
Final CDR | 0.00% |  | 0.00%
Maximum |  |  |
Schedule of Expected Losses to be Paid [Line Items] |  |  |
Plateau CDR | 13.50% |  | 10.00%
Final CDR | 0.70% |  | 0.50%
Loss severity on future defaults | 50.00% |  |
Maximum | Home Equity Line of Credit |  |  |
Schedule of Expected Losses to be Paid [Line Items] |  |  |
Plateau CDR | 5.00% |  | 9.30%
Final CDR | 0.20% |  | 0.50%
Weighted Average |  |  |
Schedule of Expected Losses to be Paid [Line Items] |  |  |
Plateau CDR | 3.40% |  | 4.20%
Final CDR | 0.20% |  | 0.20%
Loss severity on future defaults | 43.10% |  |
Weighted Average | Home Equity Line of Credit |  |  |
Schedule of Expected Losses to be Paid [Line Items] |  |  |
Plateau CDR | 2.30% |  | 2.60%
Final CDR | 0.10% |  | 0.10%

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