Goodwill and Other Intangible Assets (Schedule of Goodwill by Reportable Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Goodwill [Line Items]
Goodwill, Transfers	$ 2	$ (5)
Goodwill [Roll Forward]
Beginning balance	8,357	8,378
Foreign currency translation adjustments and other	(18)	16
Ending balance	7,989	8,357
Cordis Divestiture
Goodwill [Roll Forward]
Disposal Group, Including Discontinued Operation, Goodwill	(388)
Medical
Goodwill [Line Items]
Goodwill, Transfers	0	0
Goodwill [Roll Forward]
Beginning balance	5,700	5,715
Foreign currency translation adjustments and other	(18)	15
Ending balance	5,330	5,700
Accumulated goodwill impairment loss	1,400	1,400
Medical | Cordis Divestiture
Goodwill [Roll Forward]
Disposal Group, Including Discontinued Operation, Goodwill	(388)
Pharmaceutical
Goodwill [Line Items]
Goodwill, Transfers	2	(5)
Goodwill [Roll Forward]
Beginning balance	2,657	2,663
Foreign currency translation adjustments and other	0	1
Ending balance	2,659	2,657
Accumulated goodwill impairment loss	829	$ 829
Pharmaceutical | Cordis Divestiture
Goodwill [Roll Forward]
Disposal Group, Including Discontinued Operation, Goodwill	$ 0