Earnings Per Share Attributable to Cardinal Health, Inc. (Narrative) (Details) shares in Thousands	3 Months Ended	6 Months Ended
Dec. 31, 2023 shares	Dec. 31, 2022 shares	Dec. 31, 2023 shares	Dec. 31, 2022 shares
Earnings Per Share [Abstract]
Potentially dilutive employee stock options, restricted share units and performance share units that were antidilutive (in shares)	1,000		1,000
Shares that would be antidilutive as a result of net loss		2,000		2,000

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482662/260-10-50-1

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration