Segment Information (Assets by Reportable Segment) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Jun. 30, 2017
Segment Reporting Information [Line Items]
Total assets	$ 41,940	$ 40,112
Operating Segments | Pharmaceutical
Segment Reporting Information [Line Items]
Total assets	22,220	21,848
Operating Segments | Medical
Segment Reporting Information [Line Items]
Total assets	18,055	10,688
Corporate
Segment Reporting Information [Line Items]
Total assets	$ 1,665	$ 7,576