Commitments, Contingent Liabilities and Litigation (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 89
Operating Leases, Future Minimum Payments, Due in Two Years	74
Operating Leases, Future Minimum Payments, Due in Three Years	57
Operating Leases, Future Minimum Payments, Due in Four Years	45
Operating Leases, Future Minimum Payments, Due in Five Years	35
Operating Leases, Future Minimum Payments, Due Thereafter	65
Leases, Operating [Abstract]
Operating Leases, Rent Expense	92	86	79
Gain (Loss) Related to Litigation Settlement [Abstract]
Litigation Settlement, Gross	$ 38
State of West Virginia vs Cardinal Health, Inc
Loss Contingencies [Line Items]
Loss Contingency, Number of Defendants	14