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Segment Information (Revenue by Reportable Segment) (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Total revenue	$ 54,763	$ 49,603
Operating Segments
Segment Reporting Information [Line Items]
Total revenue	54,766	49,606
Operating Segments | Pharmaceutical
Segment Reporting Information [Line Items]
Total revenue	51,006	45,828
Operating Segments | Medical
Segment Reporting Information [Line Items]
Total revenue	3,760	3,778
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	324	281
Pharmaceutical Distribution and Specialty [Member] | Operating Segments | Pharmaceutical
Segment Reporting Information [Line Items]
Total revenue	50,682	45,547
Medical distribution and products [Member] | Operating Segments | Medical
Segment Reporting Information [Line Items]
Total revenue	3,076	3,140
Cardinal Health At Home Solutions [Member] | Operating Segments | Medical
Segment Reporting Information [Line Items]
Total revenue	$ 684	$ 638

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- 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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