Segment Information (Assets by Reportable Segment) (Details) - USD ($) $ in Millions	Mar. 31, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Total assets	$ 34,174	$ 34,122
Operating Segments | Pharmaceutical
Segment Reporting Information [Line Items]
Total assets	21,469	20,662
Operating Segments | Medical
Segment Reporting Information [Line Items]
Total assets	10,645	10,236
Corporate
Segment Reporting Information [Line Items]
Total assets	$ 2,060	$ 3,224