Intangible Assets

6 Months Ended

Mar. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible assets consisted of:


	March 31, 2022						September 30, 2021
(Millions of dollars)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Amortized intangible assets
Developed technology	$	14,535	$	(5,491)	$	9,044	$	14,399	$	(4,983)	$	9,417
Customer relationships	4,686		(2,005)		2,681		4,658		(1,839)		2,818
Product rights	115		(82)		33		123		(83)		40
Trademarks	408		(146)		262		409		(137)		271
Patents and other	543		(343)		200		533		(342)		191
Amortized intangible assets	$	20,287	$	(8,067)	$	12,220	$	20,122	$	(7,385)	$	12,737
Unamortized intangible assets
Acquired in-process research and development	$	44					$	44
Trademarks	2						2
Unamortized intangible assets	$	46					$	46

Intangible amortization expense for the three months ended March 31, 2022 and 2021 was $352 million and $350 million, respectively. Intangible amortization expense for the six months ended March 31, 2022 and 2021 was $707 million and $698 million, respectively.

The following is a reconciliation of goodwill by business segment:


(Millions of dollars)	Medical		Life Sciences		Interventional		Total
Goodwill as of September 30, 2021	$	10,255	$	836	$	12,810	$	23,901
Acquisitions (a)	—		71		205		276

Purchase price allocation adjustments	—		—		(2)		(2)
Currency translation	(32)		(6)		(42)		(80)
Goodwill as of March 31, 2022	$	10,223	$	902	$	12,971	$	24,096

(a)Represents goodwill recognized relative to certain acquisitions which were not material individually or in the aggregate.