Share-Based Compensation (Schedule Of Stock Options Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Outstanding at beginning of year, Number of Shares	12,909
Outstanding at beginning of year, Weighted-Average Exercise Price	$ 23.78
Granted, Number of Shares	1,663
Granted, Weighted-Average Exercise Price	$ 81.71
Exercised, Number of Shares	(1,556)
Exercised, Weighted-Average Exercise Price	$ 16.48
Forfeited and expired, Number of Shares	(176)
Forfeited and expired, Weighted-Average Exercise Price	$ 46.26
Outstanding as of June 30, 2012, Number of Shares	12,840
Outstanding as of June 30, 2012, Weighted-Average Exercise Price	$ 31.86
Outstanding as of June 30, 2012, Aggregate Intrinsic Value	$ 652,462
Outstanding as of June 30, 2012, Weighted-Average Remaining Contractual Term	6 years 5 months 27 days
Exercisable as of June 30, 2012, Number of Shares	7,966
Exercisable as of June 30, 2012, Weighted-Average Exercise Price	$ 16.88
Exercisable as of June 30, 2012, Aggregate Intrinsic Value	$ 523,941
Exercisable as of June 30, 2012, Weighted-Average Remaining Contractual Term	5 years 3 months 1 day