INTANGIBLE ASSETS

3 Months Ended

Dec. 28, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

INTANGIBLE ASSETS

INTANGIBLE ASSETS

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

	December 28, 2019						September 30, 2019
	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net
Trademarks and trade names	$	957	$	—	$	957	$	956	$	—	$	956
Technology	1,840		519		1,321		1,806		496		1,310
Order backlog	93		51		42		107		45		62
Customer relationships	443		35		408		438		30		408
Other	18		9		9		17		9		8
Total	$	3,351	$	614	$	2,737	$	3,324	$	580	$	2,744

The aggregate amortization expense on identifiable intangible assets for the thirteen week periods ended December 28, 2019 and December 29, 2018 was approximately $39.9 million and $20.0 million, respectively. The estimated amortization expense is $171.9 million for fiscal year 2020, $115.2 million for fiscal year 2021, and $114.7 million for each of the four succeeding fiscal years 2022 through 2025.

The following is a summary of changes in the carrying value of goodwill by segment from September 30, 2019 through December 28, 2019 (in millions):

	Power & Control			Airframe		Non- aviation			Total
Balance at September 30, 2019	$	4,121		$	3,598	$	101		$	7,820
Purchase price allocation adjustments	(106		)	106		(3		)	(3		)
Currency translation adjustment	12			16		1			29
Balance at December 28, 2019	$	4,027		$	3,720	$	99		$	7,846