Segment Information (Revenue by Reportable Segment) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Total revenue	$ 54,911	$ 50,487	$ 167,119	$ 151,559
Operating Segments
Segment Reporting Information [Line Items]
Total revenue	54,931	50,510	167,180	151,619
Operating Segments | Pharmaceutical and Specialty Solutions
Segment Reporting Information [Line Items]
Total revenue	50,651	46,496	154,524	139,441
Operating Segments | Global Medical Products and Distribution
Segment Reporting Information [Line Items]
Total revenue	3,113	2,989	9,264	9,140
Operating Segments | Other Segments
Segment Reporting Information [Line Items]
Total revenue	1,167	1,025	3,392	3,038
Corporate
Segment Reporting Information [Line Items]
Total revenue	(20)	(23)	(61)	(60)
Nuclear Precision Health Services [Member] | Operating Segments | Other Segments
Segment Reporting Information [Line Items]
Total revenue	352	313	1,006	875
OptiFreight Logistics [Member] | Operating Segments | Other Segments
Segment Reporting Information [Line Items]
Total revenue	72	61	198	177
at-Home Solutions [Member] | Operating Segments | Other Segments
Segment Reporting Information [Line Items]
Total revenue	$ 743	$ 651	$ 2,188	$ 1,986