Segment Information (Assets by Reportable Segment) (Details) - USD ($) $ in Millions	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Total assets	$ 44,453	$ 40,766	$ 40,963
Disposal Group, Including Discontinued Operation, Assets	1,101	0
Cordis Divestiture
Segment Reporting Information [Line Items]
Disposal Group, Including Discontinued Operation, Assets	1,091
Medical | Cordis Divestiture
Segment Reporting Information [Line Items]
Disposal Group, Including Discontinued Operation, Assets	1,100
Operating Segments | Pharmaceutical
Segment Reporting Information [Line Items]
Total assets	23,624	22,398	22,446
Operating Segments | Medical
Segment Reporting Information [Line Items]
Total assets	15,408	14,691	15,284
Corporate
Segment Reporting Information [Line Items]
Total assets	$ 5,421	$ 3,677	$ 3,233