| Dec 31, 2010 | Dec 31, 2011 | Dec 31, 2012 | Dec 31, 2013 | Dec 31, 2014 | Dec 31, 2015 | Dec 31, 2016 | Dec 31, 2017 | Dec 31, 2018 | Dec 31, 2019 | Dec 31, 2020 | Dec 31, 2021 | Dec 31, 2022 | Dec 31, 2023 | Dec 31, 2024 |
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| Net income (loss) | 111 | 26 | 132 | 173 | 101 | 102 | 131 | 140 | 120 | 169 | -582 | 320 | -164 | -2 | 54 |
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| Amortization of premiums, discounts, and debt issuance costs, net | 36 | 32 | 13 | 26 | 34 | 34 | 26 | 18 | 14 | 5 | -9 | 10 | -6 | -18 | -12 |
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| Depreciation and amortization of non-financial assets | 1 | 2 | 2 | 0 | 1 | 1 | 1 | 1 | 1 | 10 | 17 | 17 | 16 | 15 | 12 |
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| Originations of held-for-sale loans | - | - | - | - | - | - | - | - | - | 570 | 1,004 | 1,258 | 1,077 | 775 | 1,577 |
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| Purchases of held-for-sale loans | - | - | 2,336 | 7,766 | 9,918 | 11,046 | 4,954 | 5,706 | 7,162 | 5,824 | 4,431 | 13,188 | 3,842 | 2,046 | 7,108 |
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| Proceeds from Sale, Loan, Held-for-Sale | - | - | - | 7,405 | 8,126 | 9,761 | 4,193 | 3,903 | 5,383 | 5,198 | 4,776 | 8,640 | 4,317 | 781 | 2,811 |
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| Principal payments on held-for-sale loans | - | - | 10 | 19 | 30 | 80 | 80 | 53 | 67 | 106 | 63 | 84 | 196 | 52 | 112 |
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| Net settlements of derivatives | - | - | -23 | 45 | -33 | -59 | -7 | -10 | 51 | -66 | -201 | 45 | 199 | 11 | -74 |
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| Non-cash equity award compensation expense and other | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 21 |
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| Market valuation adjustments | - | -40 | 15 | 96 | -0 | -52 | -13 | 51 | 24 | 97 | -541 | 321 | -227 | 36 | 108 |
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| Realized gains, net | - | - | 76 | 36 | 15 | 36 | 28 | 13 | 27 | 24 | 30 | 18 | 5 | 2 | 0 |
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| Accrued interest receivable and other assets | -4 | 43 | - | - | - | - | - | - | - | 83 | -301 | 65 | -43 | 41 | 41 |
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| Increase (Decrease) in Operating Liabilities | - | - | 37 | 29 | -3 | 6 | 4 | -5 | 21 | 5 | -69 | 42 | -79 | -10 | 24 |
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| Net cash used in operating activities | 30 | 18 | -450 | -222 | -1,791 | -1,250 | -546 | -1,713 | -1,612 | -1,166 | -505 | -5,695 | -139 | -2,016 | -5,863 |
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| Originations of loan investments | - | - | - | - | - | - | - | - | - | - | - | - | - | 807 | 121 |
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| Purchases of loan investments | 525 | 960 | 156 | 66 | 87 | 22 | - | - | 148 | 49 | - | 65 | 22 | - | - |
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| Proceeds from sales of loan investments | - | - | 389 | 0 | - | 6 | 236 | - | - | 9 | 1,574 | 9 | 2 | 46 | 94 |
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| Principal payments on loan investments | - | - | - | - | - | - | - | - | - | - | - | - | - | 1,549 | 2,768 |
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| Purchases of real estate securities | - | - | - | - | - | - | - | - | - | - | - | - | - | 10 | 235 |
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| Proceeds from sales of real estate securities | - | - | 207 | 221 | 505 | 439 | 497 | 228 | 582 | 707 | 659 | 40 | 32 | 144 | 3 |
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| Principal payments on real estate securities | - | - | 218 | 164 | 174 | 139 | 80 | 78 | 84 | 84 | 27 | 61 | 33 | 1 | 9 |
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| Repayments Of Servicing Advance Investments | - | - | - | - | - | - | - | - | 95 | 204 | 108 | 76 | 71 | 56 | 0 |
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| Acquisition of Riverbend, net of cash acquired | - | - | - | - | - | - | - | - | - | 4 | - | - | 41 | - | - |
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| Purchases of HEI | - | - | - | - | - | - | - | - | - | - | - | - | 248 | 108 | 2 |
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| Repayments on HEI | - | - | - | - | - | - | - | - | - | - | - | -134 | 43 | 43 | 50 |
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| Other investing activities, net | - | - | - | - | - | - | - | - | 10 | 68 | 18 | 33 | 4 | 5 | 28 |
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| Net cash provided by investing activities | 115 | -416 | 723 | 351 | 741 | 863 | 1,334 | 287 | -13 | 1,026 | 4,070 | 1,404 | 214 | 909 | 2,538 |
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| Proceeds from Issuance of Unsecured Debt | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 10,022 |
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| Repayments on borrowings on debt obligations | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 9,789 |
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| Proceeds from Issuance of Secured Debt | 211 | 888 | 174 | - | - | - | - | 567 | 1,659 | 1,397 | 1,685 | 4,472 | 1,420 | 2,466 | 5,312 |
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| Repayments on asset-backed securities issued | 455 | 493 | 684 | 584 | 397 | 389 | 261 | 205 | 459 | 1,123 | 1,493 | 1,990 | 1,454 | 873 | 2,154 |
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| Debt issuance costs paid | 2 | 5 | 4 | 9 | 7 | 0 | - | 7 | 5 | 7 | 10 | 4 | 21 | 3 | 17 |
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| Proceeds from Issuance of Common Stock | 4 | 6 | 37 | 9 | 10 | 7 | 0 | 0 | 143 | 451 | 6 | 22 | 68 | 124 | 0 |
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| Net proceeds from issuance of preferred stock | - | - | - | - | - | - | - | - | - | - | - | - | - | 67 | - |
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| Payments for repurchase of common stock | - | 7 | - | - | - | 86 | 28 | 8 | 16 | - | 22 | - | 56 | - | - |
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| Taxes paid on equity award distributions | - | - | - | 6 | 8 | 8 | 7 | 4 | 5 | 5 | 4 | 2 | 2 | 5 | 5 |
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| Dividends paid on common stock | - | - | - | - | - | - | - | - | - | - | - | - | - | 88 | 93 |
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| Dividends paid on preferred stock | - | - | - | - | - | - | - | - | - | - | - | - | - | 5 | 7 |
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| Other financing activities, net | -9 | - | - | - | - | - | - | - | - | -2 | 4 | 7 | -5 | -7 | -2 |
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| Net cash provided by (used in) financing activities | -341 | 618 | -459 | -37 | 1,147 | 337 | -795 | 1,358 | 1,683 | 225 | -3,311 | 4,278 | -277 | 1,147 | 3,268 |
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| Net (decrease) increase in cash and cash equivalents | - | - | - | - | - | - | - | - | 58 | 86 | 254 | -13 | -202 | 39 | -56 |
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| Interest | - | - | - | - | - | - | - | - | 207 | 452 | 456 | 401 | 519 | 603 | 811 |
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| Income Taxes Paid, Net | - | - | - | - | - | - | - | - | - | - | - | - | - | -1 | 4 |
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| Servicing Asset at Fair Value, Additions | - | - | - | 44 | 48 | 65 | 10 | 7 | 0 | 1 | - | 7 | 5 | - | 1 |
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| Dividends declared but not paid on preferred stock | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 |
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| Loan, Transfer from Held-for-Sale to Held-in-Portfolio | - | - | - | - | - | 1,556 | 1,064 | 1,245 | 2,063 | 1,802 | 1,869 | 5,027 | 2,949 | 2,790 | 5,703 |
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| Transfers from loans held-for-investment to loans held-for-sale | - | 393 | - | - | 634 | 154 | 359 | 99 | 16 | 23 | 65 | 92 | - | 28 | 15 |
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| Real Estate Owned, Transfer to Real Estate Owned | - | - | - | - | - | 9 | 12 | 4 | 4 | 9 | 14 | 40 | 8 | 100 | 23 |
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| Consolidation Of Securitized Bridge Loans | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 288 |
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| Consolidation of CAFL bridge ABS | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 285 |
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| Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | - | - | - | - | - | - | - | - | - | 13 | 8 | 7 | - | 0 | 0 |
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| Operating Lease, Liability, Reduction From Lease Modification | - | - | - | - | - | - | - | - | - | - | 2 | - | - | 0 | - |
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