Joint Ventures and Other Equity Method Affiliates (Details 1) (AstraZeneca LP [Member], USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
AstraZeneca LP [Member]
Summarized financial information for AZLP
Sales	$ 1,124	$ 1,200	$ 3,460	$ 3,790
Materials and production costs	464	605	1,524	1,864
Other expense, net	357	224	1,004	679
Income before taxes	$ 303	$ 371	$ 932	$ 1,247