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Schedule II Condensed Financial Information of Registrant - Condensed Balance Sheet (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
ASSETS |  |  |
Investments in subsidiaries | $ 983.7 | $ 712.8 |
Other assets | 328.7 | 288.1 |
Total assets | 13,446.8 | 14,383.9 | $ 13,471.8
LIABILITIES AND SHAREHOLDERS' EQUITY |  |  |
Short-term debt | 249.0 | 249.0 |
Long-term debt | 249.0 | 253.6 |
Other liabilities | 297.0 | 428.2 |
Total liabilities | 12,358.6 | 12,576.5 |
Preferred stock, $0.001 par value, authorized 1,000,000 shares; none issued | 0.0 | 0.0 |
Common stock, $0.001 par value, authorized 75,000,000 shares; issued, 2022, 66,618,465; 2021, 75,000,000 | 0.1 | 0.1 |
Additional paid-in capital | 502.6 | 495.3 |
Retained earnings | 1,468.6 | 1,524.9 |
Accumulated other comprehensive income (loss), net of taxes: |  |  |
Net unrealized investment gains (losses) on fixed maturity securities | (356.9) | 290.7 |
Net funded status of benefit plans | (8.8) | (10.2) |
Treasury stock, at cost, 2022, 25,714,153 shares; 2021, 24,043,337 shares | (517.4) | (493.4) |
Total shareholders' equity | 1,088.2 | 1,807.4 | $ 1,790.1
Total liabilities and shareholders' equity | 13,446.8 | 14,383.9 |
Parent company |  |  |
ASSETS |  |  |
Investments and cash | 2.1 | 115.3 |
Investments in subsidiaries | 1,587.0 | 2,191.3 |
Other assets | 7.1 | 11.3 |
Total assets | 1,596.2 | 2,317.9 |
LIABILITIES AND SHAREHOLDERS' EQUITY |  |  |
Short-term debt | 249.0 | 249.0 |
Long-term debt | 249.0 | 248.6 |
Other liabilities | 10.0 | 12.9 |
Total liabilities | 508.0 | 510.5 |
Preferred stock, $0.001 par value, authorized 1,000,000 shares; none issued | 0.0 | 0.0 |
Common stock, $0.001 par value, authorized 75,000,000 shares; issued, 2022, 66,618,465; 2021, 75,000,000 | 0.1 | 0.1 |
Additional paid-in capital | 502.6 | 495.3 |
Retained earnings | 1,468.6 | 1,524.9 |
Accumulated other comprehensive income (loss), net of taxes: |  |  |
Net unrealized investment gains (losses) on fixed maturity securities | (356.9) | 290.7 |
Net funded status of benefit plans | (8.8) | (10.2) |
Treasury stock, at cost, 2022, 25,714,153 shares; 2021, 24,043,337 shares | (517.4) | (493.4) |
Total shareholders' equity | 1,088.2 | 1,807.4 |
Total liabilities and shareholders' equity | $ 1,596.2 | $ 2,317.9 |

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