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Basis of Presentation, Summary of Significant Accounting Policies and Other (Revenue and Gross Trade Receivables Percentage by Major Customers) (Details) (Pharmaceutical)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
CVS Caremark Corporation
Revenue, Major Customer [Line Items]
Revenue, Major Customer, Percentage	28.00%	23.00%	22.00%
Gross Trade Receivables, Major Customer, Percentage	22.00%	19.00%
Walgreens Co
Revenue, Major Customer [Line Items]
Revenue, Major Customer, Percentage	4.00%	20.00%	21.00%
Gross Trade Receivables, Major Customer, Percentage	0.00%	24.00%

X

- Definition

Reflects the percentage that gross trade receivables in the period from one or more significant customers is to gross receivables, as defined by the entity. The risk is the materially adverse effects of payment default by a significant customer.

+ References

No definition available.

+ Details

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Namespace Prefix:	cah_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

+ Details

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Balance Type:	na
Period Type:	duration

X

- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration