Shareholders' Equity (Common Stock Issued With The Exercise Of Stock Options (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Stockholders' Equity Note [Abstract]
Shares issued (in actual number of shares)	37,996	71,030	1,025,673
Proceeds from the exercise of stock options	$ 1.9	$ 3.4	$ 54.5
Average exercise price per share (in dollars per share)	$ 50.34	$ 47.94	$ 53.13