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