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Intangible Assets (Tables)
 12 Months Ended
Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Components of Intangible Assets
Intangible assets at September 30 consisted of:
 20252024
(Millions of dollars)Gross
Carrying
Amount		Accumulated
Amortization		Net Carrying AmountGross
Carrying
Amount		Accumulated
Amortization		Net Carrying Amount
Amortized intangible assets
Developed technology$15,876 $(9,225)$6,651 $15,827 $(8,094)$7,733 
Customer relationships5,522 (3,291)2,231 5,513 (2,878)2,635 
Patents, trademarks and other1,251 (745)507 1,185 (682)503 
Amortized intangible assets$22,649 $(13,261)$9,389 $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)MedicalLife SciencesInterventionalTotal
Goodwill as of September 30, 2023
$10,955 $897 $12,670 $24,522 
Acquisitions (a)1,833 — — 1,833 
Currency translation43 7 59 109 
Goodwill as of September 30, 2024
$12,832 $904 $12,729 $26,465 
Acquisitions (b)— 4 — 4 
Purchase price allocation adjustments 67 — — 67 
Currency translation34 6 35 75 
Goodwill as of September 30, 2025
$12,934 $914 $12,764 $26,612 
(a)Represents goodwill recognized in the Medical segment upon the Company's acquisition of Advanced Patient Monitoring, which is further discussed in Note 11
(b)Represents goodwill recognized relative to a certain acquisition in fiscal year 2025, which was not material.