Intangible Assets - Reconciliation of Goodwill by Business Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 26,465	$ 24,522
Goodwill, acquired during period	4	1,833
Purchase price allocation adjustments	67
Currency translation	75	109
Goodwill, ending balance	26,612	26,465
Medical
Goodwill [Roll Forward]
Goodwill, beginning balance	12,832	10,955
Goodwill, acquired during period	0	1,833
Purchase price allocation adjustments	67
Currency translation	34	43
Goodwill, ending balance	12,934	12,832
Life Sciences
Goodwill [Roll Forward]
Goodwill, beginning balance	904	897
Goodwill, acquired during period	4	0
Purchase price allocation adjustments	0
Currency translation	6	7
Goodwill, ending balance	914	904
Interventional
Goodwill [Roll Forward]
Goodwill, beginning balance	12,729	12,670
Goodwill, acquired during period	0	0
Purchase price allocation adjustments	0
Currency translation	35	59
Goodwill, ending balance	$ 12,764	$ 12,729