Basis of Presentation and Summary of Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended								12 Months Ended																												12 Months Ended
	Jun. 30, 2013 Segments Reportable_Segments		Jun. 30, 2012 Segments Reportable_Segments		Jun. 30, 2011 Reportable_Segments Segments		Jun. 30, 2010		Jun. 30, 2013 Pharmaceutical	Jun. 30, 2013 Nuclear Pharmacy Services division	Jun. 30, 2013 Walgreen Co Pharmaceutical	Jun. 30, 2012 Walgreen Co Pharmaceutical	Jun. 30, 2011 Walgreen Co Pharmaceutical	Jun. 30, 2013 Group Purchasing Organizations	Jun. 30, 2012 Group Purchasing Organizations	Jun. 30, 2011 Group Purchasing Organizations	Jun. 30, 2013 CareFusion	Jun. 30, 2012 CareFusion	Jun. 30, 2011 CareFusion	Aug. 31, 2009 CareFusion	Jun. 30, 2013 Allowance for Trade Receivables		Jun. 30, 2012 Allowance for Trade Receivables		Jun. 30, 2011 Allowance for Trade Receivables		Jun. 30, 2010 Allowance for Trade Receivables		Jun. 30, 2013 Allowance for Finance Notes Receivable		Jun. 30, 2012 Allowance for Finance Notes Receivable		Jun. 30, 2011 Allowance for Finance Notes Receivable		Jun. 30, 2010 Allowance for Finance Notes Receivable		Jun. 30, 2013 Minimum	Jun. 30, 2013 Maximum	Jun. 30, 2013 Building and Improvements Minimum	Jun. 30, 2013 Building and Improvements Maximum	Jun. 30, 2013 Machinery and Equipment Minimum	Jun. 30, 2013 Machinery and Equipment Maximum	Jun. 30, 2013 Furniture and Fixtures Minimum	Jun. 30, 2013 Furniture and Fixtures Maximum
Percentage distribution of CareFusion stock to Cardinal Health shareholders																				81.00%
Indemnification receivable																	$ 186	$ 265
Amount Of Transition Service Fee Income																	3	3	65
Amount Of Trade Receivables Purchased																			460
Contract expiration date											Aug. 31, 2013								Apr. 01, 2011
Receivable Financing Agreement Term																																					120 days	7 years
Finance notes and accrued interest receivables, net, total	161		163
Finance notes and accrued interest, net, current	29		33
Valuation Allowances and Reserves, Balance	152	[1]	143	[1]	150	[1]	140	[1]													134	[1]	126	[1]	134	[1]	123	[1]	17	[1]	16	[1]	15	[1]	16	[1]
Revenue, Major Customer, Percentage											20.00%	21.00%	23.00%	13.00%	13.00%	14.00%
Percentage of LIFO Inventory	65.00%		69.00%
Inventories valued at LIFO amount higher than average cost value	97		72
Reserves for excess and obsolete inventory	40		37
Property and Equipment, Useful Life																																							3 years	39 years	3 years	20 years	3 years	7 years
Depreciation expense	259		241		244
Interest rate on long-term projects (approximates weighted-average on long-term obligations)	3.78%
Number of Operating Segments	2		2		2
Number of Reportable Segments	2		2		2
Goodwill Impairment Test Discount Rate										10.00%																											9.00%	12.00%
Goodwill, Impairment Loss	(829)								(829)	829
Goodwill, Impairment Loss, Net of Tax										799
Vendor Reserves	66		75
Probability Of Realizing Tax Benefit	50.00%
Cash dividends per common share paid	$ 1.025		$ 0.86		$ 0.78
Accrual for Estimated Sales Returns and Allowances	291		0
Sales returns and allowances	2,300		1,900		1,700
Shipping and handling costs	$ 419		$ 389		$ 342

[1] Amounts included herein pertain to the continuing operations of the Company.