Segment Information (Assets by Reportable Segment) (Details) - USD ($) $ in Millions	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Total assets	$ 40,766	$ 40,963	$ 39,951
Operating Segments | Pharmaceutical
Segment Reporting Information [Line Items]
Total assets	22,398	22,446	21,421
Operating Segments | Medical
Segment Reporting Information [Line Items]
Total assets	14,691	15,284	16,066
Corporate
Segment Reporting Information [Line Items]
Total assets	$ 3,677	$ 3,233	$ 2,464