Segment Information (Segment Profit by Reportable Segment) (Details) $ in Millions	12 Months Ended
	Jun. 30, 2025 USD ($) segment	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Number of Reportable Segments | segment	2
Cost of products sold	$ 214,410	$ 219,413	$ 198,105
Distribution, selling, general, and administrative expenses	5,382	5,000	4,800
Operating Income (Loss)	2,275	1,243	752
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Cost of products sold	214,492	219,495	198,181
Distribution, selling, general, and administrative expenses	5,261	4,887	4,746
Costs and Expenses	219,753	224,382	202,927
Operating Income (Loss)	2,909	2,530	2,130
Operating Segments | Pharmaceutical and Specialty Solutions
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Cost of products sold	199,999	205,864	184,814
Distribution, selling, general, and administrative expenses	2,387	2,140	2,119
Costs and Expenses	202,386	208,004	186,933
Operating Income (Loss)	2,258	2,015	1,881
Operating Segments | GMPD
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Cost of products sold	10,470	10,264	10,377
Distribution, selling, general, and administrative expenses	2,031	2,025	1,992
Costs and Expenses	12,501	12,289	12,369
Operating Income (Loss)	135	92	(147)
Operating Segments | Other Operating Segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Cost of products sold	4,023	3,367	2,990
Distribution, selling, general, and administrative expenses	843	722	635
Costs and Expenses	4,866	4,089	3,625
Operating Income (Loss)	516	423	396
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income (Loss)	$ (634)	$ (1,287)	$ (1,378)