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Segment Information (Revenue by Reportable Segment) (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Total revenue	$ 49,603	$ 43,968
Operating Segments
Segment Reporting Information [Line Items]
Total revenue	49,606	43,971
Operating Segments | Pharmaceutical
Segment Reporting Information [Line Items]
Total revenue	45,828	39,822
Operating Segments | Medical
Segment Reporting Information [Line Items]
Total revenue	3,778	4,149
Corporate
Segment Reporting Information [Line Items]
Total revenue	(3)	(3)
Nuclear Precision Health Services [Member] | Operating Segments | Pharmaceutical
Segment Reporting Information [Line Items]
Total revenue	281	208
Pharmaceutical Distribution and Specialty [Member] | Operating Segments | Pharmaceutical
Segment Reporting Information [Line Items]
Total revenue	45,547	39,614
Medical distribution and products [Member] | Operating Segments | Medical
Segment Reporting Information [Line Items]
Total revenue	3,140	3,567
Cardinal Health At Home Solutions [Member] | Operating Segments | Medical
Segment Reporting Information [Line Items]
Total revenue	$ 638	$ 582

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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