Segment Information (Assets by Reportable Segment) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Total assets	$ 40,963	$ 39,951	$ 40,112
Operating Segments | Pharmaceutical
Segment Reporting Information [Line Items]
Total assets	22,446	21,421	21,848
Operating Segments | Medical
Segment Reporting Information [Line Items]
Total assets	15,284	16,066	10,688
Corporate
Segment Reporting Information [Line Items]
Total assets	$ 3,233	$ 2,464	$ 7,576