| In millions, except per share items | Jun-30-23 | Mar-31-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 |
| | 10-Q | 10-Q | 8-K | 10-Q | 10-Q | 10-Q | 8-K | 10-Q |
| Cash Flows From Operating Activities | | | | | | | | |
| Net income | 386.7 | 89.9 | | 154.2 | 33.3 | 689.9 | | 170.7 |
| |
| Adjustments to reconcile net income to net cash from (used in) operating activities: | | | | | | | | |
| Change in fair value of investments, net | 26.3 | 243.3 | | -968.3 | 234.0 | 147.1 | | -11.1 |
| Change in fair value of secured notes and bonds payable | -4.5 | 2.5 | | -15.1 | -28.0 | -7.2 | | -4.0 |
| (Gain) loss on settlement of investments, net | -115.7 | -167.6 | | 1,004.5 | -97.4 | -61.2 | | 98.3 |
| (Gain) loss on sale of originated residential mortgage loans, held-for-sale, net | -151.8 | -109.3 | | -203.5 | -304.8 | -472.0 | | -566.8 |
| Accretion and other amortization | -19.4 | -18.3 | | -10.5 | -19.6 | -15.1 | | -4.9 |
| Provision (reversal) for credit losses on securities, loans and real estate owned | 5.8 | -2.8 | | 6.7 | 3.8 | 3.7 | | 6.4 |
| Non-cash portions of servicing revenue, net | -29.5 | 149.7 | | 86.8 | -334.1 | -645.0 | | 248.6 |
| Deferred tax provision | 56.4 | -16.8 | | 22.1 | 74.1 | 201.4 | | 27.5 |
| Mortgage loans originated and purchased for sale, net of fees | -10,577.7 | -7,531.9 | | -15,125.9 | -20,874.3 | -29,446.7 | | -36,134.7 |
| Sales proceeds and loan repayment proceeds for residential mortgage loans, held-for-sale | 10,263.8 | 8,227.5 | | 16,316.7 | 22,510.4 | 33,244.9 | | 36,876.7 |
| Interest received from servicer advance investments, RMBS, loans and other | 14.2 | 13.7 | | 15.4 | -10.3 | 41.7 | | 33.1 |
| Changes in: | | | | | | | | |
| Servicer advances receivable, net | 147.0 | 230.6 | | 38.5 | 91.5 | 202.9 | | 50.3 |
| Other assets | -34.3 | 50.5 | | -127.0 | 341.3 | -268.8 | | -336.5 |
| Due to affiliate | | | | | -9.9 | -7.9 | | 0.2 |
| Accrued expenses and other liabilities | 62.5 | 21.3 | | 184.9 | -153.2 | 285.5 | | -116.0 |
| Net cash provided by (used in) operating activities | 51.0 | 1,181.3 | | 1,376.6 | 1,465.1 | 3,890.2 | | 327.9 |
| |
| Cash Flows From Investing Activities | | | | | | | | |
| Purchase of servicer advance investments | -213.0 | -232.4 | | -244.7 | -242.2 | -257.8 | | -309.5 |
| Purchase of MSRs, MSR financing receivables and servicer advances receivable | | | | -0.7 | 0.1 | -0.7 | | -4.2 |
| Purchase of U.S. Treasury Bills | -973.8 | | | | | | | |
| Purchase of residential mortgage loans | | -1.3 | | | | -7.2 | | |
| Purchase of SFR properties, real estate owned and other assets | -7.4 | -4.6 | | -42.0 | -115.7 | -239.3 | | -177.6 |
| Draws on revolving consumer loans | -6.7 | -6.8 | | -7.7 | -7.2 | -7.2 | | -8.1 |
| Net settlement of derivatives | 65.6 | 225.6 | | 3.5 | 213.9 | 65.4 | | -55.3 |
| Principal repayments from servicer advance investments | 224.6 | 240.3 | | 249.8 | 251.7 | 290.1 | | 335.8 |
| Net cash provided by (used in) investing activities | -236.1 | -590.6 | | -1,319.9 | 1,201.7 | -736.3 | | 5,181.2 |
| |
| Cash Flows From Financing Activities | | | | | | | | |
| Repayments of secured notes and bonds payable | -1,860.5 | -1,677.5 | | -954.4 | -1,172.1 | -1,048.0 | | -1,861.8 |
| Net cash provided by (used in) financing activities | 73.6 | -408.0 | | -51.9 | -2,688.2 | -2,716.1 | | -5,142.4 |
| Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash | -111.6 | 182.7 | | | -21.4 | 437.8 | | |
| |
| Supplemental Disclosure of Cash Flow Information | | | | | | | | |
| Cash paid during the period for interest | 338.1 | 286.4 | | 189.0 | 147.2 | 132.8 | | 133.6 |
| |
| Supplemental Schedule of Non-Cash Investing and Financing Activities | | | | | | | | |
| |
| Residential mortgage loans subject to repurchase | | | | | | | | |
| Cashless exercise of 2020 warrants (par) | | 0.1 | | | | | | |
| Cashless purchase of consumer loans | 1,317.3 | | | | | | | |