Consolidated Statements of Income (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues:
Product sales	$ 16,639	$ 15,295	$ 14,660
Other revenues	626	287	393
Total revenues	17,265	15,582	15,053
Operating expenses:
Cost of sales (excludes amortization of certain acquired intangible assets presented separately)	2,918	2,427	2,220
Research and development	3,380	3,167	2,894
Selling, general and administrative	4,801	4,486	3,983
Amortization of certain acquired intangible assets	294	294	294
Other	295	896	117
Total operating expenses	11,688	11,270	9,508
Operating income	5,577	4,312	5,545
Interest expense, net	1,053	610	604
Interest and other income, net	485	448	376
Income before income taxes	5,009	4,150	5,317
Provision for income taxes	664	467	690
Net income	$ 4,345	$ 3,683	$ 4,627
Earnings per share:
Basic	$ 5.61	$ 4.07	$ 4.82
Diluted	$ 5.52	$ 4.04	$ 4.79
Shares used in calculation of earnings per share:
Basic	775	905	960
Diluted	787	912	965