Employee Benefit Plans (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
All Other Segments [Member]
Details of total stock-based compensation expense by statement functional line
Stock-based compensation expense	$ 128	$ 121	$ 415	$ 402
Cost of product revenue [Member]
Details of total stock-based compensation expense by statement functional line
Stock-based compensation expense	6	6	21	19
Research and development [Member]
Details of total stock-based compensation expense by statement functional line
Stock-based compensation expense	89	85	278	284
Selling, general and administrative [Member]
Details of total stock-based compensation expense by statement functional line
Stock-based compensation expense	$ 33	$ 30	$ 116	$ 99