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Expected Loss to be Paid (Recovered) - Key Assumptions in Base Scenario Expected Loss First Lien RMBS (Details) - RMBS - United States | Mar. 31, 2024 | Dec. 31, 2023
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Schedule of Expected Losses to be Paid [Line Items] |  |
Loss severity on future defaults | 50.00% | 50.00%
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 | 40.00% | 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 | 40.00% | 40.00%
90+ Days Delinquent | Home Equity Line of Credit |  |
Schedule of Expected Losses to be Paid [Line Items] |  |
Liquidation rate | 60.00% | 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 | 55.00% | 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%
Minimum | Home Equity Line of Credit |  |
Schedule of Expected Losses to be Paid [Line Items] |  |
Plateau CDR | 0.00% | 0.00%
Final CDR | 0.00% | 0.00%
Maximum |  |
Schedule of Expected Losses to be Paid [Line Items] |  |
Plateau CDR | 11.80% | 10.00%
Final CDR | 0.60% | 0.50%
Maximum | Home Equity Line of Credit |  |
Schedule of Expected Losses to be Paid [Line Items] |  |
Plateau CDR | 6.30% | 9.30%
Final CDR | 0.30% | 0.50%
Weighted Average |  |
Schedule of Expected Losses to be Paid [Line Items] |  |
Plateau CDR | 4.10% | 4.20%
Final CDR | 0.20% | 0.20%
Weighted Average | Home Equity Line of Credit |  |
Schedule of Expected Losses to be Paid [Line Items] |  |
Plateau CDR | 2.60% | 2.60%
Final CDR | 0.10% | 0.10%

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