Share-Based Compensation (Schedule Of Stock Options Activity) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) $ / shares shares
Share-based Payment Arrangement [Abstract]
Outstanding at beginning of year, number of shares | shares	15,416
Outstanding at beginning of year, weighted-average exercise price | $ / shares	$ 56.36
Granted, number of shares | shares	2
Granted, weighted-average exercise price | $ / shares	$ 73.01
Exercised, number of shares | shares	(2,449)
Exercised, weighted-average exercise price | $ / shares	$ 48.43
Forfeited and expired, number of shares | shares	(152)
Forfeited and expired, weighted-average exercise price | $ / shares	$ 61.55
Outstanding end of year, number of shares | shares	12,817
Outstanding at end of year, weighted-average exercise price | $ / shares	$ 57.82
Outstanding at end of year, aggregate intrinsic value | $	$ 83,254
Outstanding at end of year, weighted-average remaining contractual term	6 years 29 days
Exercisable at end of year, number of shares | shares	6,269
Exercisable at end of year, weighted-average exercise price | $ / shares	$ 54.59
Exercisable at end of year, aggregate intrinsic value | $	$ 61,354
Exercisable at end of year, weighted-average remaining contractual term	4 years 6 months 18 days