Equity Compensation Plans (Summary Of Stock Option Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding balance - shares under option, beginning	29,304,653
Granted - shares under option	5,650,767
Exercised - shares under option	(3,722,749)
Forfeited/cancelled - shares under option	(5,107,912)
Outstanding balance - shares under option, ending	26,124,759
Vested and expected to vest on December 31, 2012 - shares under option	25,811,443
Exercisable on December 31, 2012 - shares under option	17,004,811
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding balance - weighted average exercise price, beginning	$ 69.19
Granted - weighted average exercise price	$ 70.81
Exercised - weighted average exercise price	$ 40.57
Forfeited/cancelled - weighted average exercise price	$ 76.52
Outstanding balance - weighted average exercise price, ending	$ 72.19
Vested and expected to vest on December 31, 2012 - weighted average exercise price	$ 72.19
Exercisable on December 31, 2012 - weighted average exercise price	$ 72.30