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Shareholders' Equity (Common Stock Issued With The Exercise Of Stock Options) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Stockholders' Equity Note [Abstract] |  |  |  |
Shares issued (in actual number of shares) | 7,000 | 16,570 | 37,996 | 71,030
Proceeds from the exercise of stock options | $ 0.4 | $ 0.8 | $ 1.9 | $ 3.4
Average exercise price per share (in dollars per share) | $ 57.15 | $ 48.15 | $ 50.34 | $ 47.94

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