Share-Based Compensation (Schedule Of Stock Options Activity) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($) $ / shares shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Outstanding at beginning of year, number of shares | shares	23,601
Outstanding at beginning of year, weighted-average exercise price | $ / shares	$ 40.33
Granted, number of shares | shares	4,194
Granted, weighted-average exercise price | $ / shares	$ 63.25
Exercised, number of shares | shares	(2,685)
Exercised, weighted-average exercise price | $ / shares	$ 25.03
Forfeited and expired, number of shares | shares	(850)
Forfeited and expired, weighted-average exercise price | $ / shares	$ 57.35
Outstanding end of year, number of shares | shares	24,260
Outstanding at end of year, weighted-average exercise price | $ / shares	$ 45.39
Outstanding at end of year, aggregate intrinsic value | $	$ 629,257
Outstanding at end of year, weighted-average remaining contractual term	5 years 11 months 28 days
Exercisable at end of year, number of shares | shares	12,802
Exercisable at end of year, weighted-average exercise price | $ / shares	$ 32.88
Exercisable at end of year, aggregate intrinsic value | $	$ 492,125
Exercisable at end of year, weighted-average remaining contractual term	3 years 9 months 24 days