Stock-based Compensation - Unvested Shares Relating To Stock Options (Details) - Unvested Stock Options - $ / shares shares in Millions |
12 Months Ended | |
---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
Shares | ||
Beginning balance (in shares) | 1.1 | 2.0 |
Granted (in shares) | 0.0 | 0.0 |
Vested (in shares) | (0.8) | (0.9) |
Forfeited (in shares) | 0.0 | 0.0 |
Ending balance (in shares) | 0.3 | 1.1 |
Weighted Average Grant Date Fair Value | ||
Beginning of period weighted average grant date fair value (dollars per share) | $ 16.38 | $ 16.50 |
Granted weighted average grant date fair value (dollars per share) | 0 | 0 |
Vested weighted average grant date fair value (dollars per share) | 15.40 | 16.67 |
Forfeited weighted average grant date fair value (dollars per share) | 0 | 0 |
Ending of period weighted average grant date fair value (dollars per share) | $ 15.45 | $ 16.38 |