| 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 | -364 | -486 | -927 | -50 | 252 | 1,172 | 343 | 356 | 670 | 674 | 446 | 635 | 865 | 713 | 763 |
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| Depreciation and other amortization | 61 | 85 | 100 | 69 | 48 | 53 | 61 | 64 | 58 | 49 | 58 | 66 | 54 | 35 | 18 |
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| Deferred tax expense (benefit) | - | 1 | 0 | -1 | -0 | 693 | -162 | -355 | -187 | -11 | -27 | -5 | 4 | -1 | -2 |
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| Equity compensation | - | - | - | - | - | - | - | - | - | - | - | - | 25 | 32 | 31 |
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| Loss on debt extinguishment | - | - | - | - | - | - | -91 | -0 | - | - | -27 | -37 | -40 | - | - |
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| Net (gains) losses on investments and other financial instruments | - | - | - | - | - | - | - | - | - | - | - | - | -7 | -14 | -10 |
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| Accrued investment income | 10 | -15 | -28 | 4 | -1 | 10 | 4 | 2 | 2 | 2 | 0 | 2 | 3 | 4 | 2 |
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| Reinsurance recoverable on loss reserves | 57 | -121 | -50 | -41 | -6 | -13 | 6 | -2 | -15 | -12 | 73 | -28 | -39 | 5 | 14 |
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| Reinsurance recoverable on paid losses | - | 14 | 4 | 5 | 4 | 3 | -2 | 1 | 1 | 1 | 1 | -36 | 18 | 8 | 6 |
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| Premiums receivable | 11 | -8 | -3 | -6 | -5 | -9 | 4 | 2 | 1 | 0 | 0 | 0 | 1 | 0 | -1 |
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| Deferred insurance policy acquisition costs | - | -1 | 4 | -2 | 3 | 3 | 3 | 1 | -1 | 1 | 3 | 0 | -3 | -4 | -3 |
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| Loss reserves | - | - | - | - | - | -503 | -455 | -453 | -312 | -119 | 325 | 3 | -326 | -53 | -43 |
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| Unearned premiums | -66 | -60 | -16 | 16 | 49 | 77 | 50 | 63 | 17 | -30 | -93 | -45 | -46 | -38 | -37 |
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| Return premium accrual | - | -28 | -12 | -12 | 22 | -10 | -19 | -25 | -23 | -11 | -0 | 7 | -12 | -4 | -9 |
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| Current income taxes | - | -1 | 2 | 1 | -1 | 3 | 1 | 49 | -78 | 1 | 6 | 5 | -9 | -4 | 16 |
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| Other, net | - | - | - | - | - | 17 | -13 | -2 | -15 | -25 | -22 | -19 | 5 | -8 | 21 |
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| Net cash provided by operating activities | -875 | -1,884 | -1,569 | -972 | - | - | - | 407 | 545 | 610 | 732 | 696 | 650 | 713 | 725 |
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| Purchases of investments | - | - | - | - | - | - | - | - | 1,459 | 1,394 | 2,637 | 1,531 | 674 | 1,470 | 1,556 |
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| Proceeds from sales of investments | - | - | - | - | - | - | - | - | 370 | 230 | 837 | 474 | 400 | 377 | 45 |
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| Proceeds from maturity of fixed income securities | - | - | - | - | - | - | - | - | - | - | - | 901 | 688 | 913 | 1,370 |
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| Proceeds from sale of property and equipment | - | - | - | - | - | - | - | - | - | - | - | - | - | 2 | - |
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| Additions to property and equipment | - | - | - | - | - | 5 | 11 | 16 | 14 | 6 | 3 | 4 | 3 | 2 | 1 |
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| Net cash (used in) provided by investing activities | -112 | 1,754 | 1,654 | -854 | - | - | - | -304 | -318 | -422 | -773 | -161 | 410 | -179 | -142 |
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| Conversion / purchase of convertible junior subordinated debentures | - | - | - | - | - | - | - | - | - | - | 36 | 99 | 89 | 29 | - |
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| Redemption of 5.75% senior notes | - | - | 53 | 17 | 22 | 74 | - | - | - | - | - | - | 242 | - | - |
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| Repayment of FHLB advance | - | - | - | - | - | - | - | - | - | - | - | - | 155 | - | - |
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| Cash portion of loss on debt extinguishment | - | - | - | - | - | - | - | - | - | - | 25 | 37 | 40 | - | - |
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| Repurchase of common stock | - | - | - | - | - | - | 147 | - | 163 | 126 | 120 | 291 | 386 | 337 | 569 |
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| Dividends paid | - | - | - | - | - | - | - | - | - | 42 | 82 | 94 | 111 | 123 | 131 |
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| Payment of withholding taxes related to share-based compensation net share settlement | - | - | - | - | - | - | - | 7 | 8 | 6 | 9 | 7 | 10 | 7 | 19 |
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| Net cash used in financing activities | 1,106 | -179 | -53 | 1,131 | - | - | - | -159 | -172 | -173 | 168 | -527 | -1,033 | -496 | -719 |
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| Net (decrease) increase in cash and cash equivalents and restricted cash and cash equivalents | - | - | - | - | - | - | - | - | 55 | 14 | 128 | 8 | 28 | 38 | -136 |
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