Segment Information (Assets by Reportable Segment) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Jun. 30, 2012
Segment Reporting, Asset Reconciling Item
Assets	$ 26,723	$ 24,260
Pharmaceutical
Segment Reporting, Asset Reconciling Item
Assets	16,926	16,642
Medical
Segment Reporting, Asset Reconciling Item
Assets	6,565	4,399
Corporate
Segment Reporting, Asset Reconciling Item
Assets	$ 3,232	$ 3,219