Segment Information (Revenue by Reportable Segment) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Total revenue	$ 35,349	$ 33,633	$ 35,186	$ 32,641	$ 32,966	$ 31,821	$ 33,150	$ 32,039	$ 136,809	$ 129,976	$ 121,546
Operating Segments
Segment Reporting Information [Line Items]
Total revenue									136,822	129,987	121,561
Operating Segments | Pharmaceutical
Segment Reporting Information [Line Items]
Total revenue									121,241	116,463	109,131
Operating Segments | Medical
Segment Reporting Information [Line Items]
Total revenue									15,581	13,524	12,430
Corporate
Segment Reporting Information [Line Items]
Total revenue									$ (13)	$ (11)	$ (15)