Share-Based Compensation (Changes in Options Outstanding Under the Plans) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Weighted average remaining life, Exercisable, in years	3.9
Employee Stock Option [Member]
Shares subject to options, Beginning balance	21,706,228	27,858,083	27,215,227
Shares subject to options, Granted	1,834,564	2,631,467	4,165,032
Shares subject to options, Exercised	(4,275,088)	(7,255,729)	(1,543,323)
Shares subject to options, Cancelled	(650,428)	(1,527,593)	(1,978,853)
Shares subject to options, Ending balance	18,615,276	21,706,228	27,858,083
Shares subject to options, Exercisable	14,007,462
Weighted average exercise price, Beginning balance, in dollars per share	$ 32.30	$ 29.54	$ 31.11
Weighted average exercise price, Granted, in dollars per share	$ 44.99	$ 31.72	$ 17.34
Weighted average exercise price, Exercised, in dollars per share	$ 30.00	$ 20.81	$ 21.45
Weighted average exercise price, Cancelled, in dollars per share	$ 35.36	$ 35.63	$ 31.99
Weighted average exercise price, Ending Balance, in dollars per share	$ 33.97	$ 32.30	$ 29.54
Weighted average exercise price, Exercisable, in dollars per share	$ 33.99
Aggregate intrinsic value, Outstanding, in USD	$ 52.3
Aggregate intrinsic value, Exercisable, in USD	$ 37.8
Weighted average remaining life, Outstanding, in years	4.8
Weighted average remaining life, Exercisable, in years	3.9