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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 | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Stockholders' Equity Note [Abstract] |  |  |  |
Shares issued (in actual number of shares) | 32,064 | 151,601 | 54,460 | 570,670
Proceeds from the exercise of stock options | $ 1.8 | $ 7.7 | $ 2.6 | $ 28.9
Average exercise price per share (in dollars per share) | $ 54.63 | $ 51.10 | $ 47.88 | $ 50.71

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