Equity Compensation Plans (Summary Of Stock Option Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011
Equity Compensation Plans [Abstract]
Outstanding balance - shares under option, beginning	27,444,169
Granted - shares under option	6,609,514
Exercised - shares under option	(4,144,982)
Forfeited/cancelled - shares under option	(604,048)
Outstanding balance - shares under option, ending	29,304,653
Vested and expected to vest on December 31, 2011 - shares under option	28,951,420
Exercisable on December 31, 2011 - shares under option	19,580,192
Outstanding balance - weighted average exercise price, beginning	$ 64.67
Granted - weighted average exercise price	$ 74.48
Exercised - weighted average exercise price	$ 47.01
Forfeited/cancelled - weighted average exercise price	$ 73.55
Outstanding balance - weighted average exercise price, ending	$ 69.19
Vested and expected to vest on December 31, 2011 - weighted average exercise price	$ 69.15
Exercisable on December 31, 2011 - weighted average exercise price	$ 67.33