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Restructuring and Related Charges - Additional Information (Details) $ in Millions	3 Months Ended				6 Months Ended	9 Months Ended	12 Months Ended
	Jul. 01, 2017 USD ($) employee	Jul. 02, 2016 USD ($) employee	Jan. 02, 2016 employee	Mar. 29, 2014 employee	Apr. 01, 2017 USD ($) employee	Jun. 27, 2015 company employee	Jul. 01, 2017 USD ($)	Jul. 02, 2016 USD ($)	Jun. 27, 2015 USD ($) company
Restructuring and Related Charges
Restructuring accrual	$ 11.0	$ 18.0					$ 11.0	$ 18.0
Restructuring and related charges							21.6	10.5	$ 26.8
Long-term restructuring liability	2.2	4.7					2.2	4.7
Number of new public entities (in company) | company						2			2
Non-cash settlements and other adjustments							0.0
OSP Restructuring Plan
Restructuring and Related Charges
Restructuring accrual	0.8	0.0					0.8	0.0
Restructuring and related charges							0.8
Non-cash settlements and other adjustments							0.0
Focused NSE Restructuring Plan
Restructuring and Related Charges
Restructuring accrual	4.9	0.0					4.9	0.0
Restructuring and related charges							21.3
Non-cash settlements and other adjustments							0.1
NE, SE, and Shared Service Agile Restructuring Plan
Restructuring and Related Charges
Restructuring accrual	0.2	8.6					0.2	8.6
Restructuring and related charges							(0.7)
Non-cash settlements and other adjustments							0.0
NE and SE Agile Restructuring Plan
Restructuring and Related Charges
Restructuring accrual	0.4	0.8					0.4	0.8
Restructuring and related charges							(0.1)
Non-cash settlements and other adjustments							0.0
NE, SE, and Shared Separation Restructuring Plan
Restructuring and Related Charges
Restructuring accrual	0.1	1.4					0.1	1.4
Restructuring and related charges							(0.2)
Non-cash settlements and other adjustments							0.0
NE Product Strategy Restructuring Plan
Restructuring and Related Charges
Restructuring accrual	0.9	1.5					0.9	1.5
Restructuring and related charges							0.0
Non-cash settlements and other adjustments							(0.1)
NE Lease Restructuring Plan
Restructuring and Related Charges
Restructuring accrual	2.6	4.0					2.6	4.0
Restructuring and related charges							0.1
Non-cash settlements and other adjustments							0.0
Contractual obligations under the operating lease, net of sublease income, fair value	2.6						2.6
Other Plans Prior to Fiscal 2015
Restructuring and Related Charges
Restructuring accrual	1.1	$ 1.7					1.1	$ 1.7
Restructuring and related charges							0.0
Non-cash settlements and other adjustments							$ 0.0
Severance | OSP Restructuring Plan
Restructuring and Related Charges
Restructuring and related charges	$ 0.8
Number of employees expected to be reduced (employee) | employee	30
Severance | Focused NSE Restructuring Plan
Restructuring and Related Charges
Restructuring and related charges					$ 21.0
Number of employees expected to be reduced (employee) | employee					300
Workforce Reduction | NE, SE, and Shared Service Agile Restructuring Plan
Restructuring and Related Charges
Number of employees expected to be reduced (employee) | employee		170
Workforce Reduction | NE and SE Agile Restructuring Plan
Restructuring and Related Charges
Number of employees expected to be reduced (employee) | employee			40
Workforce Reduction | NE, SE, and Shared Separation Restructuring Plan
Restructuring and Related Charges
Number of employees expected to be reduced (employee) | employee						330
Workforce Reduction | NE Product Strategy Restructuring Plan
Restructuring and Related Charges
Number of employees expected to be reduced (employee) | employee				60

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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