Share-Based Compensation (Schedule Of Stock Options Activity) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 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	(2,763)
Exercised, weighted-average exercise price | $ / shares	$ 56.18
Forfeited and expired, number of shares | shares	(108)
Forfeited and expired, weighted-average exercise price | $ / shares	$ 59.56
Outstanding end of year, number of shares | shares	7,333
Outstanding at end of year, weighted-average exercise price | $ / shares	$ 59.49
Outstanding at end of year, aggregate intrinsic value | $	$ 136,929
Outstanding at end of year, weighted-average remaining contractual term	4 years 6 months 25 days
Exercisable at end of year, number of shares | shares	5,484
Exercisable at end of year, weighted-average exercise price | $ / shares	$ 58.79
Exercisable at end of year, aggregate intrinsic value | $	$ 106,205
Exercisable at end of year, weighted-average remaining contractual term	3 years 11 months 26 days