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Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions | Total | Series C Preferred Stock | Series D Preferred Stock | Preferred Stock | Preferred Stock Series C Preferred Stock | Preferred Stock Series D Preferred Stock | Common Stock | Retained Earnings | Accumulated Other Comprehensive Income (Loss)
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance as of beginning-of-year at Dec. 31, 2021 |  |  |  | $ 0 |  |  | $ 4,735 | $ 5,196 | $ 9,984
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Issuance of preferred stock |  |  |  |  | $ 493 | $ 493 |  |  |
Stock compensation/issued for benefit plans |  |  |  |  |  |  | 40 |  |
Net income (loss) | $ 1,358 |  |  |  |  |  |  | 1,358 |
Retirement of common stock/cancellation of shares |  |  |  |  |  |  | (231) | (319) |
Common stock dividends declared |  |  |  |  |  |  |  | (311) |
Other comprehensive income (loss), net of tax | (16,336) |  |  |  |  |  |  |  | (16,336)
Balance as of end-of-year at Dec. 31, 2022 | 5,102 |  |  | 986 |  |  | 4,544 | 5,924 | (6,352)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Stock compensation/issued for benefit plans |  |  |  |  |  |  | 61 |  |
Net income (loss) | (752) |  |  |  |  |  |  | (752) |
Preferred stock dividends declared | (82) | $ (36) | $ (46) |  |  |  |  | (82) |
Common stock dividends declared |  |  |  |  |  |  |  | (312) |
Other comprehensive income (loss), net of tax | 2,876 |  |  |  |  |  |  |  | 2,876
Balance as of end-of-year at Dec. 31, 2023 | 6,893 |  |  | 986 |  |  | 4,605 | 4,778 | (3,476)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Stock compensation/issued for benefit plans |  |  |  |  |  |  | 69 |  |
Net income (loss) | 3,275 |  |  |  |  |  |  | 3,275 |
Preferred stock dividends declared | (91) | $ (46) | $ (45) |  |  |  |  | (91) |
Common stock dividends declared |  |  |  |  |  |  |  | (317) |
Other comprehensive income (loss), net of tax | (1,560) |  |  |  |  |  |  |  | (1,560)
Balance as of end-of-year at Dec. 31, 2024 | $ 8,269 |  |  | $ 986 |  |  | $ 4,674 | $ 7,645 | $ (5,036)

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