Earnings Per Share Attributable to Cardinal Health, Inc. Narrative (Details) - shares shares in Thousands	3 Months Ended
Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Weighted Average Number Diluted Shares Outstanding Adjustment	4,000	7,000
shares that would be antidilutive as a result of net loss		2,000

Number of shares excluded from calculation of diluted shares

No definition available.

Name:	cah_Numberofsharesexcludedfromcalculationofdilutedshares
Namespace Prefix:	cah_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration