Segment Information (Depreciation and Amortization and Additions to Property and Equipment by Reportable Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Total depreciation and amortization	$ 913	$ 1,000	$ 1,032
Total additions to property and equipment	375	328	384
Operating Segments | Pharmaceutical
Segment Reporting Information [Line Items]
Total depreciation and amortization	135	147	156
Total additions to property and equipment	47	35	58
Operating Segments | Medical
Segment Reporting Information [Line Items]
Total depreciation and amortization	243	288	278
Total additions to property and equipment	86	74	127
Corporate
Segment Reporting Information [Line Items]
Total depreciation and amortization	535	565	598
Total additions to property and equipment	$ 242	$ 219	$ 199