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Restructuring and Related Charges - Additional Information (Details) $ in Millions	3 Months Ended						12 Months Ended
	Jun. 30, 2018 USD ($) employee	Dec. 30, 2017 employee	Jul. 01, 2017 USD ($) employee	Jul. 02, 2016 employee	Apr. 02, 2016 employee	Mar. 29, 2014 employee	Jun. 30, 2018 USD ($) employee	Jul. 01, 2017 USD ($)	Jul. 02, 2016 USD ($)
Restructuring and Related Charges
Restructuring accrual	$ 7.5		$ 11.0				$ 7.5	$ 11.0
Restructuring and related charges							8.3	21.6	$ 10.5
Long-term restructuring liability	0.1		2.2				0.1	2.2
Trilithic Restructuring Plan
Restructuring and Related Charges
Restructuring accrual	2.9		0.0				2.9	0.0
Restructuring and related charges							3.3
OSP Restructuring Plan
Restructuring and Related Charges
Restructuring accrual	0.0		0.8				0.0	0.8
Restructuring and related charges							0.1
Focused NSE Restructuring Plan
Restructuring and Related Charges
Restructuring accrual	1.9		4.9				1.9	4.9
Restructuring and related charges							4.4
NE, SE, and Shared Service Agile Restructuring Plan
Restructuring and Related Charges
Restructuring accrual	0.0		0.2				0.0	0.2
Restructuring and related charges							(0.1)
NE and SE Agile Restructuring Plan
Restructuring and Related Charges
Restructuring accrual	0.5		0.4				0.5	0.4
Restructuring and related charges							0.1
NE Product Strategy Restructuring Plan
Restructuring and Related Charges
Restructuring accrual	0.4		0.9				0.4	0.9
Restructuring and related charges							0.0
NE Lease Restructuring Plan
Restructuring and Related Charges
Restructuring accrual	1.2		2.6				1.2	2.6
Restructuring and related charges							0.0
Contractual obligations under the operating lease, net of sublease income, fair value	1.2						1.2
Other Plans Prior to Fiscal 2015
Restructuring and Related Charges
Restructuring accrual	$ 0.6		$ 1.2				0.6	$ 1.2
Restructuring and related charges							0.0
Lease Termination Costs | Trilithic Restructuring Plan
Restructuring and Related Charges
Restructuring and related charges							2.3
Severance | Trilithic Restructuring Plan
Restructuring and Related Charges
Restructuring and related charges							$ 1.0
Number of employees expected to be reduced (employee) | employee							40
Severance | OSP Restructuring Plan
Restructuring and Related Charges
Number of employees impacted | employee			30
Severance | Focused NSE Restructuring Plan
Restructuring and Related Charges
Number of employees impacted | employee							360
Increase in number of positions eliminated | employee	60	60
Workforce Reduction | NE, SE, and Shared Service Agile Restructuring Plan
Restructuring and Related Charges
Number of employees impacted | employee				170
Workforce Reduction | NE and SE Agile Restructuring Plan
Restructuring and Related Charges
Number of employees impacted | employee					40
Workforce Reduction | NE Product Strategy Restructuring Plan
Restructuring and Related Charges
Number of employees impacted | employee						60

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