Stock-Based Compensation (Schedule Of Option Activity And Changes) (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares shares
Options
Options, Outstanding, beginning balance | shares	1,578,870
Options, Granted | shares	276,535
Options, Exercised | shares	(239,131)
Options, Cancelled | shares	(46,618)
Options, Outstanding, ending balance | shares	1,569,656
Options, Exercisable, ending balance | shares	929,365
Weighted Average Exercise Price
Weighted Average Exercise Price, Outstanding, beginning balance (in dollars per share) | $ / shares	$ 67.39
Weighted Average Exercise Price, Granted (in dollars per share) | $ / shares	86.54
Weighted Average Exercise Price, Exercised (in dollars per share) | $ / shares	53.51
Weighted Average Exercise Price, Cancelled (in dollars per share) | $ / shares	82.76
Weighted Average Exercise Price, Outstanding, ending balance (in dollars per share) | $ / shares	72.43
Weighted Average Exercise Price, Exercisable, ending balance (in dollars per share) | $ / shares	$ 69.77
Weighted Average Remaining Term (Years) [Abstract]
Weighted Average Remaining Term (Years), Outstanding	6 years 7 months 6 days
Weighted Average Remaining Term (Years), Exercisable	5 years 4 months 24 days
Aggregate Intrinsic Value [Abstract]
Aggregate Intrinsic Value, Outstanding | $	$ 40
Aggregate Intrinsic Value, Exercisable | $	$ 27