Segment Information (Assets by Reportable Segment) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Jun. 30, 2021
Segment Reporting Information [Line Items]
Total assets	$ 42,993	$ 44,453
Total assets held for sale	0	1,101
Medical | Cordis Divestiture [Member]
Segment Reporting Information [Line Items]
Total assets held for sale		1,100
Operating Segments | Pharmaceutical
Segment Reporting Information [Line Items]
Total assets	23,955	23,624
Operating Segments | Medical
Segment Reporting Information [Line Items]
Total assets	14,156	15,408
Corporate
Segment Reporting Information [Line Items]
Total assets	$ 4,882	$ 5,421