Income Taxes (Details) - USD ($)	3 Months Ended					9 Months Ended
	Jul. 02, 2017	Apr. 02, 2017	Jun. 26, 2016	Mar. 27, 2016	Dec. 27, 2015	Jul. 02, 2017	Jun. 26, 2016	Oct. 02, 2016
Effective tax rate (as a percent)						30.40%	34.30%
Income tax benefits	$ (13,114,000)		$ (10,805,000)			$ (36,462,000)	$ (27,497,000)
Tax benefit recognized in connection with the IRS examination settlement		$ 1,200,000
Payments made to tax authorities	23,000,000
Acquisition and integration expenses and debt pre-payment fees				$ 13,300,000
Income tax benefit on business combination acquisition and integration expenses and debt pre-payment fees				0
Non-deductible expenses related to business acquisition				6,400,000
Business combination integration costs and debt pre-payment fees				$ 6,900,000
R&D Credits					$ 2,000,000
Effective income tax rate excluding R&D credits (as a percent)							32.70%
Liability for uncertain tax positions	5,900,000					5,900,000		$ 13,300,000
Accounting Standards Update 2016-09
Income tax benefits	$ 2,100,000					$ 4,800,000