Share-Based Employee Compensation Plans and Other Compensation and Benefit Plans (Summary Of Stock Options) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Employee Stock Option [Member]
Outstanding at December 31, 2011, shares	7,393
Outstanding at December 31, 2011, weighted-average exercise price	37.41
Granted, shares	1,834
Granted, weighted-average exercise price	88.75
Exercised, shares	(1,831)
Exercised, weighted-average exercise price	29.41
Forfeited, shares	(675)
Forfeited, weighted-average exercise price	62.97
Outstanding at December 31, 2012, shares	6,721
Outstanding at December 31, 2012, weighted-average exercise price	51.03
Oustanding at December 31, 2012, average remaining contractual term	6 years 10 months 14 days
Outstanding at December 31, 2012, aggregate intrinsic value	258,059
Vested or expected to vest at December 31, 2012, shares	6,224
Vested or expedted to vest at December 31, 2012, weighted-average exercise price	49.17
Vested or expected to vest at December 31, 2012, average remianing contractual term	6 years 8 months 15 days
Vested or expected to vest at December 31, 2012, aggregate intrinsic value	250,536
Exercisable at December 31, 2012, shares	3,527
Exercisable at December 31, 2012, weighted-average exercise price	31.36
Exercisable at December 31, 2012, average remaining contractual term	5 years 2 months 2 days
Exercisable at December 31, 2012, aggregate intrinsic value	204,777
Stock Option [Member]
Exercisable at December 31, 2012, average remaining contractual term	5 years 1 month 16 days	5 years 1 month 13 days	5 years 2 months 16 days
Director [Member] | Stock Option [Member]
Outstanding at December 31, 2011, shares	97
Outstanding at December 31, 2011, weighted-average exercise price	35.00
Granted, shares	0
Granted, weighted-average exercise price	0.00
Exercised, shares	(29)
Exercised, weighted-average exercise price	34.92
Forfeited, shares	0
Forfeited, weighted-average exercise price	0.00
Outstanding at December 31, 2012, shares	68
Outstanding at December 31, 2012, weighted-average exercise price	35.03
Oustanding at December 31, 2012, average remaining contractual term	3 years 3 months 22 days
Outstanding at December 31, 2012, aggregate intrinsic value	3,698
Vested or expected to vest at December 31, 2012, shares	68
Vested or expedted to vest at December 31, 2012, weighted-average exercise price	35.03
Vested or expected to vest at December 31, 2012, average remianing contractual term	3 years 3 months 22 days
Vested or expected to vest at December 31, 2012, aggregate intrinsic value	3,698
Exercisable at December 31, 2012, shares	68
Exercisable at December 31, 2012, weighted-average exercise price	35.03
Exercisable at December 31, 2012, average remaining contractual term	3 years 3 months 22 days
Exercisable at December 31, 2012, aggregate intrinsic value	3,698