Long-Term Debt	9 Months Ended
Long-Term Debt	Sep. 30, 2020
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term DebtRefer to our Annual Report on Form 10-K for the year ended December 31, 2019 for a full description of our long-term debt. FHLBC Borrowings At September 30, 2020, $1 million of advances were outstanding under our FHLBC borrowing agreement, with a weighted average interest rate of 0.35%. These borrowings mature in 2026. At December 31, 2019, $2.00 billion of advances were outstanding under this agreement, which were classified as long-term debt, with a weighted average interest rate of 1.88% and a weighted average maturity of six years. During the three and nine months ended September 30, 2020, we repaid zero and $2.00 billion, respectively, of our FHLBC borrowings. At September 30, 2020, total advances under this agreement were secured by $1 million of restricted cash. We do not expect to increase borrowings under our FHLBC borrowing agreement above the existing $1 million of advances outstanding. This agreement also requires our subsidiary to purchase and hold stock in the FHLBC in an amount equal to a specified percentage of outstanding advances. At September 30, 2020, our subsidiary held $5 million of FHLBC stock that is included in Other assets in our consolidated balance sheets. Recourse Subordinate Securities Financing Facilities In 2019, a subsidiary of Redwood entered into a repurchase agreement providing non-marginable (e.g., not subject to margin calls based on the market value of the underlying collateral) recourse debt financing of certain Sequoia securities as well as securities retained from our consolidated Sequoia Choice securitizations. The financing is fully and unconditionally guaranteed by Redwood, with an interest rate of approximately 4.21% through September 2022. The financing facility may be terminated, at our option, in September 2022, and has a final maturity in September 2024, provided that the interest rate on amounts outstanding under the facility increases between October 2022 and September 2024. At September 30, 2020, we had borrowings under this facility totaling $180 million and $1 million of unamortized deferred issuance costs, for a net carrying value of $179 million. At September 30, 2020, the fair value of real estate securities pledged as collateral under this long-term debt facility was $232 million and included Sequoia securities and securities retained from our Sequoia Choice securitizations. In the first quarter of 2020, a subsidiary of Redwood entered into a second repurchase agreement with similar terms to provide non-marginable recourse debt financing of certain securities retained from our consolidated CAFL securitizations. The financing is fully and unconditionally guaranteed by Redwood, with an interest rate of approximately 4.21% through February 2023. The financing facility may be terminated, at our option, in February 2023, and has a final maturity in February 2025, provided that the interest rate on amounts outstanding under the facility increases between March 2023 and February 2025. At September 30, 2020, we had borrowings under this facility totaling $103 million and $1 million of unamortized deferred issuance costs, for a net carrying value of $102 million. At September 30, 2020, the fair value of real estate securities pledged as collateral under this long-term debt facility was $112 million and included securities retained from our consolidated CAFL securitizations. Non-Recourse Business Purpose Loan Financing Facilities In the third quarter of 2020, a subsidiary of Redwood entered into a repurchase agreement providing non-marginable, non-recourse financing primarily for business purpose bridge loans. Borrowings under this facility accrue interest at a per annum rate equal to one-month LIBOR plus 3.85% (with a 0.50% LIBOR floor), through July 2022. We do not have the ability to increase borrowings under this borrowing facility above the existing amounts outstanding. At September 30, 2020, we had borrowings under this facility totaling $158 million and $1 million of unamortized deferred issuance costs, for a net carrying value of $157 million. At September 30, 2020, $216 million of bridge loans were pledged as collateral under this facility. In the second quarter of 2020, a subsidiary of Redwood entered into a repurchase agreement providing non-marginable, non-recourse financing primarily for business purpose bridge loans. Borrowings under this facility accrue interest at a per annum rate equal to one-month LIBOR plus 7.50% (with a 1.50% LIBOR floor), through June 2022 (facility is fully callable in June 2021). This facility has an aggregate maximum borrowing capacity of $530 million, which consists of a term facility of $355 million and a revolving facility of $175 million. The revolving period ends in June 2021, and amounts borrowed under the term and revolving facilities are due in full in June 2022. At September 30, 2020, we had borrowings under this facility totaling $302 million and $4 million of unamortized deferred issuance costs, for a net carrying value of $298 million. At September 30, 2020, $369 million of bridge loans and $25 million of other BPL investments were pledged as collateral under this facility. Recourse Business Purpose Loan Financing Facilities In the third quarter of 2020, a subsidiary of Redwood entered into a repurchase agreement providing non-marginable financing for business purpose bridge loans and single-family rental loans. Borrowings under this facility accrue interest at a per annum rate equal to three-month LIBOR plus 3.00% through September 2023 and are recourse to Redwood. This facility has an aggregate maximum borrowing capacity of $250 million. At September 30, 2020, we had no borrowings outstanding under this facility. In the second quarter of 2020, a subsidiary of Redwood entered into a repurchase agreement providing non-marginable financing for business purpose bridge loans and single-family rental loans. Borrowings under this facility accrue interest at a per annum rate equal to three-month LIBOR plus 3.50% to 4.00% (with a 1.00% LIBOR floor) through May 2022 and are recourse to Redwood. This facility has an aggregate maximum borrowing capacity of $350 million. At September 30, 2020, we had borrowings under this facility totaling $150 million and $1 million of unamortized deferred issuance costs, for a net carrying value of $150 million. At September 30, 2020, $18 million of bridge loans and $194 million of single-family rental loans were pledged as collateral under this facility. Recourse Revolving Debt Facility In the first quarter of 2020, a subsidiary of Redwood entered into a secured revolving debt facility agreement collateralized by MSRs and certificated mortgage servicing rights. Borrowings under this facility accrue interest at a per annum rate equal to one-month LIBOR plus 2.75% through January 2021, with an increase in rate between February 2021 and the maturity of the facility in January 2022. This facility has an aggregate maximum borrowing capacity of $50 million. We had no borrowings outstanding under this facility at September 30, 2020. At September 30, 2020, $33 million of MSRs and certificated servicing rights were pledged as collateral under this facility. Convertible Notes At September 30, 2020, we had $172 million principal amount outstanding of 5.75% exchangeable senior notes due 2025. During the second quarter of 2020, we repurchased $29 million par value of these notes at a discount and recorded a gain on extinguishment of $6 million in Realized gains, net on our consolidated statements of income (loss). At September 30, 2020, the accrued interest payable balance on this debt was $5 million and the unamortized deferred issuance costs were $4 million. At September 30, 2020, we had $150 million principal amount outstanding of 5.625% convertible senior notes due 2024. During the second quarter of 2020, we repurchased $50 million par value of these notes at a discount and recorded a gain on extinguishment of $9 million in Realized gains, net on our consolidated statements of income (loss). At September 30, 2020, the accrued interest payable on this debt was $2 million, the unamortized deferred issuance costs were $2 million, and the debt discount was $1 million. At September 30, 2020, we had $199 million principal amount outstanding of 4.75% convertible senior notes due 2023. During the second quarter of 2020, we repurchased $46 million par value of these notes at a discount and recorded a gain on extinguishment of $10 million in Realized gains, net on our consolidated statements of income (loss). At September 30, 2020, the accrued interest payable balance on this debt was $1 million and the unamortized deferred issuance costs were $3 million. Trust Preferred Securities and Subordinated Notes At September 30, 2020, we had trust preferred securities and subordinated notes outstanding of $100 million and $40 million, respectively. At both September 30, 2020 and December 31, 2019, the accrued interest payable balance on our trust preferred securities and subordinated notes was $1 million.