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Unaudited Condensed Consolidated Statements of Income (Stock-based Compensation Expense) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Details of total stock-based compensation expense by statement functional line
Stock-based compensation expense	$ 121	$ 113	$ 402	$ 359
Cost of product revenue [Member]
Details of total stock-based compensation expense by statement functional line
Stock-based compensation expense	6	5	19	17
Research and development [Member]
Details of total stock-based compensation expense by statement functional line
Stock-based compensation expense	85	80	284	253
Selling, general and administrative [Member]
Details of total stock-based compensation expense by statement functional line
Stock-based compensation expense	$ 30	$ 28	$ 99	$ 89

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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