Condensed Consolidated Statements of Income (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenues:
Product sales	$ 4,151	$ 3,901
Other revenues	87	147
Total revenues	4,238	4,048
Operating expenses:
Cost of sales	744	750
Research and development	878	736
Selling, general and administrative	1,158	1,079
Other	16	6
Total operating expenses	2,796	2,571
Operating income	1,442	1,477
Interest expense, net	263	235
Interest and other income, net	164	124
Income before income taxes	1,343	1,366
(Benefit) provision for income taxes	(91)	182
Net income	$ 1,434	$ 1,184
Earnings per share:
Basic (in usd per share)	$ 1.91	$ 1.50
Diluted (in usd per share)	$ 1.88	$ 1.48
Shares used in calculation of earnings per share:
Basic (in shares)	751	791
Diluted (in shares)	764	800
Dividends paid per share (in usd per share)	$ 0.47000000	$ 0.36000000