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Restructuring and Employee Severance (Liabilities Associated with Restructuring and Employee Severance Activities) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2013
Employee-Related Costs |  |  |
Restructuring Reserve |  |  |
Beginning Balance | $ 24 | $ 55 | $ 16
Additions | 34 | 23 | 63
Payments and other adjustments | (36) | (54) | (24)
Ending Balance | 22 | 24 | 55
Facility Exit and Other Costs |  |  |
Restructuring Reserve |  |  |
Beginning Balance | 0 | 2 | 2
Additions | 1 | 1 | 2
Payments and other adjustments | (1) | (3) | (2)
Ending Balance | 0 | 0 | 2
Total |  |  |
Restructuring Reserve |  |  |
Beginning Balance | 24 | 57 | 18
Additions | 35 | 24 | 65
Payments and other adjustments | (37) | (57) | (26)
Ending Balance | $ 22 | $ 24 | $ 57

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- Definition Additions to restructuring reserves associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan. + References No definition available. + Details
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Namespace Prefix: | cah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Includes the amount of cash payments, reversals and other adjustments made during the period to the amount of a previously accrued liability as the result of exit or disposal activities. + References No definition available. + Details
Name: | cah_RestructuringPaymentsandOtherAdjustments
Namespace Prefix: | cah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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Balance Type: | na
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- Details
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- Details
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Data Type: | na
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Period Type: |

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- Details
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Namespace Prefix: |
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