Goodwill and Intangible Assets (Tables)

6 Months Ended

Mar. 30, 2018

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 30, 2018							September 29, 2017
		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Customer relationships	5	$	78.5	$	(65.7	)	$	12.8	$	78.5	$	(63.4	)	$	15.1
Developed technology and other	5	150.2		(116.4		)	33.8		150.2		(110.9		)	39.3
Trademarks	3	1.6		(0.5		)	1.1		1.6		(0.3		)	1.3
Internally developed software	3	18.0		(3.0		)	15.0		12.1		—			12.1
Total intangible assets		$	248.3	$	(185.6	)	$	62.7	$	242.4	$	(174.6	)	$	67.8

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 intangible assets is expected to be as follows (in millions):

	Remaining 2018		2019		2020		2021		2022		Thereafter
Amortization expense	$	10.7	$	20.1	$	17.4	$	8.5	$	0.5	$	5.5