Intangible Assets - Reconciliation of Goodwill by Business Segment (Detail) $ in Millions	9 Months Ended
	Jun. 30, 2020 USD ($)
Goodwill [Roll Forward]
Goodwill as of September 30, 2019	$ 23,376
Goodwill, Acquired During Period	117
Goodwill, Purchase Accounting Adjustments	1
Currency translation	55
Goodwill as of June 30, 2020	23,549
Medical
Goodwill [Roll Forward]
Goodwill as of September 30, 2019	9,989
Goodwill, Acquired During Period	10
Goodwill, Purchase Accounting Adjustments	0
Currency translation	19
Goodwill as of June 30, 2020	10,019
Life Sciences
Goodwill [Roll Forward]
Goodwill as of September 30, 2019	772
Goodwill, Acquired During Period	58
Goodwill, Purchase Accounting Adjustments	1
Currency translation	3
Goodwill as of June 30, 2020	834
Interventional
Goodwill [Roll Forward]
Goodwill as of September 30, 2019	12,615
Goodwill, Acquired During Period	49
Goodwill, Purchase Accounting Adjustments	0
Currency translation	33
Goodwill as of June 30, 2020	$ 12,697