Share-Based Compensation and Benefit Plans (Summary Of Stock Options) (Details) (Stock Option [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Stock Option [Member]
Outstanding at December 31, 2014, shares	4,065
Outstanding at December 31, 2014, weighted-average exercise price	$ 64.57
Granted, shares	209
Granted, weighted-average exercise price	$ 200.96
Exercised, shares	(377)
Exercised, weighted-average exercise price	$ 46.30
Forfeited, shares	(28)
Forfeited, weighted-average exercise price	$ 86.31
Outstanding at March 31, 2015, shares	3,869
Outstanding at March 31, 2015, weighted-average exercise price	$ 73.58
Exercisable at March 31, 2015, shares	2,566
Exercisable at March 31, 2015, weighted-average exercise price	$ 48.16