Share-Based Compensation and Benefit Plans (Summary Of Stock Options) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Employee Stock Option [Member]
Outstanding at December 31, 2013 shares	5,177
Outstanding at December 31, 2013 weighted-average exercise price	54.28
Granted, shares	392
Granted, weighted-average exercise price	150.82
Exercised, shares	(1,310)
Exercised, weighted-average exercise price	45.26
Forfeited, shares	(234)
Forfeited, weighted-average exercise price	85.25
Outstanding at December 31, 2014 shares	4,025
Outstanding at December 31, 2014 weighted-average exercise price	64.82
Outstanding at December 31, 2014, average remaining contractual term	5 years 9 months 10 days
Outstanding at December 31, 2014, aggregate intrinsic value	514,443
Vested or expected to vest at December 31, 2014, shares	3,879
Vested or expected to vest at December 31, 2014, weighted-average exercise price	63.61
Vested or expected to vest at December 31, 2014, average remaining contractual term	5 years 8 months 13 days
Vested or expected to vest at December 31, 2014, aggregate intrinsic value	500,413
Exercisable at December 31, 2014, shares	2,617
Exercisable at December 31, 2014, weighted-average exercise price	43.60
Exercisable at December 31, 2014, average remaining contractual term	4 years 7 months 7 days
Exercisable at December 31, 2014, aggregate intrinsic value	389,953
Stock Option [Member]
Exercisable at December 31, 2014, average remaining contractual term	4 years 6 months 21 days	4 years 9 months 9 days	5 years 1 month 16 days
Director [Member]
Outstanding at December 31, 2013 shares	50
Outstanding at December 31, 2013 weighted-average exercise price	37.37
Granted, shares	0
Granted, weighted-average exercise price	0.00
Exercised, shares	(10)
Exercised, weighted-average exercise price	30.08
Forfeited, shares	0
Forfeited, weighted-average exercise price	0.00
Outstanding at December 31, 2014 shares	40
Outstanding at December 31, 2014 weighted-average exercise price	39.19
Outstanding at December 31, 2014, average remaining contractual term	1 year 7 months 20 days
Outstanding at December 31, 2014, aggregate intrinsic value	6,137
Vested or expected to vest at December 31, 2014, shares	40
Vested or expected to vest at December 31, 2014, weighted-average exercise price	39.19
Vested or expected to vest at December 31, 2014, average remaining contractual term	1 year 7 months 20 days
Vested or expected to vest at December 31, 2014, aggregate intrinsic value	6,137
Exercisable at December 31, 2014, shares	40
Exercisable at December 31, 2014, weighted-average exercise price	39.19
Exercisable at December 31, 2014, average remaining contractual term	1 year 7 months 20 days
Exercisable at December 31, 2014, aggregate intrinsic value	6,137