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Stockholders' Equity - RSU and PSU Narrative (Details) - USD ($) $ in Millions | 1 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jul. 31, 2016 | Jun. 30, 2016 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Stock Compensation Plans |  |  |  |  |
Stock compensation expense |  |  | $ 183.0 | $ 177.9 | $ 166.6
Employee Stock Option |  |  |  |  |
Stock Compensation Plans |  |  |  |  |
Vesting period | 4 years | 3 years |  |  |
Employee Stock Option | Tranche One |  |  |  |  |
Stock Compensation Plans |  |  |  |  |
Percentage of units vesting at the end of each calendar year (as a percent) | 25.00% | 33.00% |  |  |
Vesting period | 1 year | 1 year |  |  |
Employee Stock Option | Tranche Two |  |  |  |  |
Stock Compensation Plans |  |  |  |  |
Vesting period | 36 months | 24 months |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |
Stock Compensation Plans |  |  |  |  |
Number of shares awarded for each RSU (in shares) |  |  | 1 |  |
Percentage of units vesting at the end of each calendar year (as a percent) |  |  | 25.00% |  |
Vesting period |  |  | 4 years |  |
Granted (in shares) |  |  | 2,102,386 |  |
Performance Stock Units (PSUs) |  |  |  |  |
Stock Compensation Plans |  |  |  |  |
Vesting period |  |  | 4 years |  |
Stock compensation expense |  |  | $ 8.3 | $ 13.9 | $ 9.9
Granted (in shares) |  |  | 214,449 |  |
Performance Stock Units (PSUs) | Minimum |  |  |  |  |
Stock Compensation Plans |  |  |  |  |
Vesting period |  |  | 3 years |  |
Performance Stock Units (PSUs) | Maximum |  |  |  |  |
Stock Compensation Plans |  |  |  |  |
Vesting period |  |  | 4 years |  |

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