Segment Information (Assets by Reportable Segment) (Details) - USD ($) $ in Millions	Mar. 31, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Total assets	$ 41,148	$ 40,963
Operating Segments | Pharmaceutical
Segment Reporting Information [Line Items]
Total assets	22,508	22,446
Operating Segments | Medical
Segment Reporting Information [Line Items]
Total assets	15,445	15,284
Corporate
Segment Reporting Information [Line Items]
Total assets	$ 3,195	$ 3,233