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Segment Information (Revenue by Reportable Segment) (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Total revenue	$ 43,968	$ 39,065
Operating Segments
Segment Reporting Information [Line Items]
Total revenue	43,971	39,069
Operating Segments | Pharmaceutical
Segment Reporting Information [Line Items]
Total revenue	39,822	35,112
Operating Segments | Medical
Segment Reporting Information [Line Items]
Total revenue	4,149	3,957
Corporate
Segment Reporting Information [Line Items]
Total revenue	(3)	(4)
Nuclear Precision Health Services [Member] | Operating Segments | Pharmaceutical
Segment Reporting Information [Line Items]
Total revenue	208	196
Pharmaceutical Distribution and Specialty [Member] | Operating Segments | Pharmaceutical
Segment Reporting Information [Line Items]
Total revenue	39,614	34,916
Medical distribution and products [Member] | Operating Segments | Medical
Segment Reporting Information [Line Items]
Total revenue	3,567	3,438
Cardinal Health At Home Solutions [Member] | Operating Segments | Medical
Segment Reporting Information [Line Items]
Total revenue	$ 582	$ 519

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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