Share-Based Compensation (Schedule Of Stock Options Activity) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) $ / shares shares
Share-based Payment Arrangement [Abstract]
Outstanding at beginning of year, number of shares | shares	10,204
Outstanding at beginning of year, weighted-average exercise price | $ / shares	$ 58.59
Exercised, number of shares | shares	(705)
Exercised, weighted-average exercise price | $ / shares	$ 51.57
Forfeited and expired, number of shares | shares	(41)
Forfeited and expired, weighted-average exercise price | $ / shares	$ 58.83
Outstanding end of year, number of shares | shares	9,458
Outstanding at end of year, weighted-average exercise price | $ / shares	$ 59.11
Outstanding at end of year, aggregate intrinsic value | $	$ 120,781
Outstanding at end of year, weighted-average remaining contractual term	5 years 4 months 9 days
Exercisable at end of year, number of shares | shares	5,997
Exercisable at end of year, weighted-average exercise price | $ / shares	$ 57.99
Exercisable at end of year, aggregate intrinsic value | $	$ 83,349
Exercisable at end of year, weighted-average remaining contractual term	4 years 6 months 10 days