Stock-Based Compensation (Calculation And Assumptions Utilized In Calculation Of Fair Values Of Options Granted) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
Share-based Payment Arrangement [Abstract] | |||
Aggregate grant date fair value (less than) | $ 0.2 | $ 0.2 | $ 0.5 |