Stock-Based Compensation Plans (Schedule Of Changes Of Restricted Stock) (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2022 $ / shares shares
Restricted Stock And Restricted Stock Units
Restricted Share Units (in 000’s)
Beginning Balance (in shares) | shares	548
Ending Balance (in shares) | shares	529
Weighted Average Grant-Date Fair Value
Beginning Balance (in dollars per share) | $ / shares	$ 82.84
Ending Balance (in dollars per share) | $ / shares	$ 92.96
Restricted Stock Units (RSUs)
Restricted Share Units (in 000’s)
Granted (in shares) | shares	186
Vested (in shares) | shares	(148)
Forfeited (in shares) | shares	(44)
Weighted Average Grant-Date Fair Value
Granted (in dollars per share) | $ / shares	$ 101.33
Vested (in dollars per share) | $ / shares	83.38
Forfeited (in dollars per share) | $ / shares	$ 83.99
Performance Based Restricted Share Units
Restricted Share Units (in 000’s)
Granted (in shares) | shares	64
Vested (in shares) | shares	(64)
Forfeited (in shares) | shares	(13)
Weighted Average Grant-Date Fair Value
Granted (in dollars per share) | $ / shares	$ 120.68
Vested (in dollars per share) | $ / shares	93.05
Forfeited (in dollars per share) | $ / shares	$ 92.24