Unaudited Condensed Consolidated Statements of Income (Stock-based Compensation Expense) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Cost of product revenue
Details of total stock-based compensation expense by statement functional line
Stock-based compensation expense	$ 6	$ 6	$ 21	$ 19
Research and development
Details of total stock-based compensation expense by statement functional line
Stock-based compensation expense	89	85	278	284
Selling, general and administrative
Details of total stock-based compensation expense by statement functional line
Stock-based compensation expense	$ 33	$ 30	$ 116	$ 99