Segment Information (Segment Profit by Reportable Segment) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total operating earnings	$ 730	$ 369	$ 1,847	$ 842
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total operating earnings	835	714	2,144	1,890
Operating Segments | Pharmaceutical and Specialty Solutions
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total operating earnings	662	582	1,723	1,533
Operating Segments | Global Medical Products and Distribution
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total operating earnings	39	22	65	45
Operating Segments | Other Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total operating earnings	134	110	356	312
Corporate
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total operating earnings	$ (105)	$ (345)	$ (297)	$ (1,048)