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Earnings Per Common Share and Stockholders' Equity (Share Repurchase Program and Treasury Stock) (Details) - USD ($) $ / shares in Units, $ in Millions | 9 Months Ended | 23 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2022 | Dec. 31, 2021 | Nov. 19, 2021 | Oct. 18, 2020
Earnings Per Share [Abstract] |  |  |  |  |
Share repurchase program, authorized amount |  |  |  | $ 500.0 | $ 500.0
Treasury stock acquired, shares | 13,600,000 | 22,700,000 |  |  |
Treasury stock acquired, average price per common share |  | $ 34.63 |  |  |
Stock repurchase program, remaining authorized repurchase amount | $ 213.0 | $ 213.0 |  |  |
Treasury stock, shares | 23,432,644 | 23,432,644 | 9,936,715 |  |
Treasury stock, carrying value | $ 780.2 | $ 780.2 | $ 260.6 |  |

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- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
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