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Intangible Assets (Tables)
 9 Months Ended
Jun. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Components of Intangible Assets
Intangible assets consisted of:
 June 30, 2025September 30, 2024
(Millions of dollars)Gross
Carrying
Amount		Accumulated
Amortization		Net Carrying AmountGross
Carrying
Amount		Accumulated
Amortization		Net Carrying Amount
Amortized intangible assets
Developed technology$15,869 $(8,941)$6,928 $15,827 $(8,094)$7,733 
Customer relationships5,522 (3,188)2,334 5,513 (2,878)2,635 
Patents, trademarks and other1,245 (735)510 1,185 (682)503 
Amortized intangible assets$22,636 $(12,864)$9,771 $22,525 $(11,654)$10,871 
Unamortized intangible assets
Acquired in-process research and development$14 $44 
Trademarks2 2 
Unamortized intangible assets$16 $46 
Reconciliation of Goodwill by Business Segment
The following is a reconciliation of goodwill by business segment:
(Millions of dollars)Medical Life SciencesInterventional Total
Goodwill as of September 30, 2024$12,832 $904 $12,729 $26,465 
Acquisitions (a)— 4 — 4 
Purchase price allocation adjustments64 — — 64 
Currency translation31 4 27 63 
Goodwill as of June 30, 2025$12,928 $913 $12,756 $26,597 
(a)    Represents goodwill recognized relative to a certain acquisition in the third quarter of fiscal year 2025, which was not material.