Goodwill and Intangible Assets (Tables)

6 Months Ended

Mar. 27, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets Excluding Goodwill

Intangible assets consist of the following (in millions):

		As of							As of
	Weighted Average Amortization Period (Years)	March 27, 2020							September 27, 2019
		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Customer relationships	5.0	$	18.2	$	(13.9	)	$	4.3	$	25.6	$	(19.5	)	$	6.1
Developed technology and other	4.1	94.4		(65.0		)	29.4		94.4		(48.9		)	45.5
Trademarks	3.0	1.6		(1.6		)	—		1.6		(1.3		)	0.3
Technology licenses	3.1	25.1		(9.3		)	15.8		24.9		(4.8		)	20.1
IPR&D		35.9		—			35.9		35.9		—			35.9
Total intangible assets		$	175.2	$	(89.8	)	$	85.4	$	182.4	$	(74.5	)	$	107.9

Schedule Of Expected Annual Amortization Expense Related To Intangible Assets For The Next Five Years

Annual amortization expense for the next five fiscal years related to definite-lived intangible assets, excluding IPR&D, is expected to be as follows (in millions):

	Remaining 2020		2021		2022		2023		2024		Thereafter
Amortization expense, cost of goods sold	$	9.6	$	2.7	$	0.1	$	0.1	$	0.1	$	1.8
Amortization expense, operating expense	$	10.9	$	15.3	$	5.0	$	1.0	$	1.0	$	1.9
Total amortization expense	$	20.5	$	18.0	$	5.1	$	1.1	$	1.1	$	3.7