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v3.19.2

Subsequent Events (Details) - ZBM Cost Savings Initiative [Member] - Subsequent Event $ in Millions | Aug. 07, 2019 USD ($)
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Minimum |
Subsequent Event [Line Items] |
Expected Future Restructuring Charges | $ 120
Maximum |
Subsequent Event [Line Items] |
Expected Future Restructuring Charges | $ 145

X
- Definition Expected Future Restructuring Charges + References No definition available. + Details
Name: | cah_ExpectedFutureRestructuringCharges
Namespace Prefix: | cah_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=cah_ZBMCostSavingsInitiativeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |