| Cover Page | May 06, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | May 6, 2021 |
| Entity Registrant Name | Cardinal Health, Inc. |
| Entity Incorporation, State or Country Code | OH |
| Entity File Number | 1-11373 |
| Entity Tax Identification Number | 31-0958666 |
| Entity Address, Address Line One | 7000 Cardinal Place |
| Entity Address, City or Town | Dublin |
| Entity Address, State or Province | OH |
| Entity Address, Postal Zip Code | 43017 |
| City Area Code | 614 |
| Local Phone Number | 757-5000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common shares (without par value) |
| Trading Symbol | CAH |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000721371 |
| Amendment Flag | false |
