Segment Information (Assets by Reportable Segment) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Segment Reporting, Asset Reconciling Item
Assets	$ 25,819	$ 24,260	$ 22,846
Pharmaceutical
Segment Reporting, Asset Reconciling Item
Assets	16,258	16,642	16,126
Medical
Segment Reporting, Asset Reconciling Item
Assets	6,521	4,399	3,895
Corporate
Segment Reporting, Asset Reconciling Item
Assets	$ 3,040	$ 3,219	$ 2,825