Other intangible assets–net in the condensed consolidated balance sheets consist of the following (in millions):


	March 30, 2024						September 30, 2023
	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net
Trademarks and trade names	$	1,017	$	—	$	1,017	$	1,019	$	—	$	1,019
Technology	2,140		940		1,200		2,124		888		1,236
Order backlog	5		3		2		7		6		1
Customer relationships	639		153		486		623		136		487
Other	9		5		4		9		5		4
Total	$	3,810	$	1,101	$	2,709	$	3,782	$	1,035	$	2,747

The aggregate amortization expense on identifiable intangible assets is approximately $37 million and $35 million for the thirteen week periods ended March 30, 2024 and April 1, 2023, respectively. The aggregate amortization expense on identifiable intangible assets is approximately $72 million and $68 million for the twenty-six week periods ended March 30, 2024 and April 1, 2023, respectively.

As disclosed in Note 2, “Acquisitions,” the estimated fair value of the net identifiable tangible and intangible assets acquired is based on the acquisition method of accounting. The fair value of the net identifiable tangible and intangible assets acquired will be finalized within the measurement period (not to exceed one year). Intangible assets acquired during the twenty-six week period ended March 30, 2024 are summarized in the table below (in millions):


	Gross Amount		Amortization Period
Intangible assets not subject to amortization:
Goodwill	$	49

	49
Intangible assets subject to amortization:
Technology	15		20 years

Order backlog	1		1.5 years
Customer relationships	10		20 years
	26
Total	$	75

The following is a summary of changes in the carrying value of goodwill by segment from September 30, 2023 through March 30, 2024 (in millions):


	Power & Control		Airframe		Non-aviation		Total
Balance at September 30, 2023	$	4,194	$	4,701	$	93	$	8,988
Goodwill acquired during the period (Note 2)	14		35		—		49
Purchase price allocation adjustments (1)	—		35		—		35
Currency translation adjustments and other	4		(25)		—		(21)
Balance at March 30, 2024	$	4,212	$	4,746	$	93	$	9,051

(1)Related to the opening balance sheet adjustments recorded from the acquisition of Calspan completed during the third quarter of fiscal 2023, within the allowable measurement period (not to exceed one year). Refer to Note 2, “Acquisitions,” for further information.

The Company performs its annual impairment test for goodwill and other intangible assets as of the first day of the fourth fiscal quarter of each year, or more frequently, if events or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying value. We have assessed the changes in events and circumstances through the second quarter of fiscal 2024 and concluded that no triggering events occurred that required interim quantitative testing.