Commitments, Contingent Liabilities and Litigation (Narrative) (Details) $ in Millions		3 Months Ended		12 Months Ended
	Oct. 02, 2015 USD ($)	Sep. 30, 2015 USD ($) distributor	Sep. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)
Commitments [Abstract]
Payments to Acquire Businesses, Net of Cash Acquired		$ 1,399.0	$ 61.0
DEA Investigation and Related Matters
Loss Contingencies
Litigation charges			$ 27.0	$ 41.0
Litigation accrual		$ 41.0
State of West Virginia vs Cardinal Health, Inc
Loss Contingencies
Number of defendants | distributor		13
Cordis
Commitments [Abstract]
Payments to Acquire Businesses, Net of Cash Acquired	$ 1,900.0
CVS Health
Commitments [Abstract]
Initial term of Pharmaceutical Sourcing Venture		10 years
Number of quarterly payments		39
Quarterly payment		$ 25.6
Increase in quarterly payments		10.0
Fiscal 2017 | CVS Health
Commitments [Abstract]
Further Increase in Quarterly Payments		10.0
Maximum Quarterly Payment		$ 45.6