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Intangible Assets (Tables)
 6 Months Ended
Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Components of Intangible Assets
Intangible assets consisted of:
 March 31, 2023September 30, 2022
(Millions of dollars)Gross
Carrying
Amount		Accumulated
Amortization		Net Carrying AmountGross
Carrying
Amount		Accumulated
Amortization		Net Carrying Amount
Amortized intangible assets
Developed technology$15,140 $(6,530)$8,610 $15,087 $(5,979)$9,108 
Customer relationships4,859 (2,347)2,512 4,853 (2,170)2,683 
Patents, trademarks and other1,113 (604)509 1,046 (574)473 
Amortized intangible assets$21,113 $(9,481)$11,632 $20,987 $(8,723)$12,264 
Unamortized intangible assets
Acquired in-process research and development$44 $44 
Trademarks2 2 
Unamortized intangible assets$46 $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, 2022$10,909 $888 $12,824 $24,621 
Purchase price allocation adjustments3 — — 3 
Currency translation56 12 89 156 
Goodwill as of March 31, 2023$10,968 $899 $12,913 $24,780