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Earnings Per Share Attributable to Cardinal Health, Inc. Narrative (Details) - shares shares in Millions | 3 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022
Earnings Per Share [Abstract] |  |
Weighted Average Number Diluted Shares Outstanding Adjustment | 1 | 4

X
- Definition Number of shares excluded from calculation of diluted shares + References No definition available. + Details
Name: | cah_Numberofsharesexcludedfromcalculationofdilutedshares
Namespace Prefix: | cah_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_EarningsPerShareAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration