Segment Information (Revenue by Reportable Segment) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2011
Segment Reporting Information
Revenue	$ 25,420	$ 24,552	$ 25,232	$ 25,889	$ 26,764	$ 26,918	$ 27,078	$ 26,792	$ 101,093		$ 107,552		$ 102,644
Pharmaceutical
Segment Reporting Information
Revenue									91,097		97,925		93,744
Medical
Segment Reporting Information
Revenue									10,060		9,642		8,922
Reportable Segment
Segment Reporting Information
Revenue									101,157		107,567		102,666
Corporate
Segment Reporting Information
Revenue									$ (64)	[1]	$ (15)	[1]	$ (22)	[1]

[1] Corporate revenue consists of the elimination of inter-segment revenue.