Intangible Assets - Reconciliation of Goodwill by Business Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 23,620	$ 23,376
Goodwill, Acquired During Period	264	117
Goodwill, Purchase Accounting Adjustments	6	5
Goodwill, Foreign Currency Translation Gain (Loss)	12	122
Goodwill, ending balance	23,901	23,620
Medical
Goodwill [Roll Forward]
Goodwill, beginning balance	10,044	9,989
Goodwill, Acquired During Period	193	10
Goodwill, Purchase Accounting Adjustments	4	0
Goodwill, Foreign Currency Translation Gain (Loss)	15	44
Goodwill, ending balance	10,255	10,044
Life Sciences
Goodwill [Roll Forward]
Goodwill, beginning balance	837	772
Goodwill, Acquired During Period	0	58
Goodwill, Purchase Accounting Adjustments	0	1
Goodwill, Foreign Currency Translation Gain (Loss)	(1)	7
Goodwill, ending balance	836	837
Interventional
Goodwill [Roll Forward]
Goodwill, beginning balance	12,739	12,615
Goodwill, Acquired During Period	72	49
Goodwill, Purchase Accounting Adjustments	1	4
Goodwill, Foreign Currency Translation Gain (Loss)	(2)	71
Goodwill, ending balance	$ 12,810	$ 12,739