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Stock Compensation Plans - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Potential shares of common stock issued under current stock compensation plan (in shares) |  | 21,000,000 |  |
Stock compensation plan, expiration date |  | Feb. 28, 2032 |  |
Contractual term | [1] |  |  | 7 years 6 months
Aggregate intrinsic value of options exercised |  | $ 0.4 | $ 11.0 | $ 0.0
Unearned compensation cost related to unvested portion |  | $ 17.0 |  |
Remaining vesting period |  | through the fourth quarter of 2025 |  |
Options |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Shares that count towards shares authorized limit per share granted (in shares) |  | 1 |  |
Vesting period |  | 4 years |  |
Stock options conversion basis (in shares) |  | 1 |  |
Contractual term |  | 10 years |  |
Cancellation, days after termination of employment |  | 90 days |  |
Options | Year 1 |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Vesting percentage |  | 0.25% |  |
Options | Year 2 |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Vesting percentage |  | 0.25% |  |
Options | Year 3 |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Vesting percentage |  | 0.25% |  |
Options | Year 4 |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Vesting percentage |  | 0.25% |  |
Awards, Excluding Options |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Shares that count towards shares authorized limit per share granted (in shares) |  | 2 |  |
Performance Share Units |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Award performance period |  | 3 years |  |
Performance Share Units | Minimum |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Percentage of units earned to units granted |  | 0.00% | 0.00% |
Performance Share Units | Maximum |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Percentage of units earned to units granted |  | 200.00% | 133.00% |
Restricted Stock Units |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Award performance period |  | 3 years |  |
[1] | We review the assumptions used in our Black-Scholes model in conjunction with estimating the grant date fair value of grants of options by our Board of Directors. There were no stock options granted during 2022 or 2021.

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