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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2022
Equity [Abstract] |
Schedule of Common Stock Activity | The following table summarizes Common Stock activity during the periods presented below:
| Year Ended December 31,
| 2022 |  | 2021 |  | 2020
| (In millions)
Shares outstanding at the beginning of the period | 133.3 |  |  | 97.8 |  |  | 96.9 |
Shares issued for vested restricted stock units | 0.7 |  |  | 1.0 |  |  | 1.3 |
Shares issued in exchange for debt retirement | — |  |  | 10.0 |  |  | — |
Shares issued under at-the-market equity offering program | 10.1 |  |  | 24.8 |  |  | — |
Shares repurchased | (0.2) |  |  | (0.3) |  |  | (0.4) |
Shares outstanding at the end of the period | 143.9 |  |  | 133.3 |  |  | 97.8 |

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- Definition Tabular disclosure of the change in common stock outstanding. + References No definition available. + Details
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