Restructuring and Related Charges (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 28, 2014	Jun. 29, 2013	Jun. 30, 2012
Summary of various restructuring plans
Accrual balance at the beginning of the period				$ 16.5					$ 16.5
Restructuring expenses	20.0	3.6	1.0	(0.8)	12.9	0.4	3.0	2.7	23.8	19.0	12.4
Cash Settlements									(16.1)
Non-cash settlements and other adjustments									2.0
Accrual balance at the end of the period	26.2				16.5				26.2	16.5
NSE Lease Restructuring Plan (first floor)
Summary of various restructuring plans
Restructuring expenses									5.2
Non-cash settlements and other adjustments									1.7
Accrual balance at the end of the period	6.9								6.9
Central Finance and IT Restructuring Plan (Workforce Reduction)
Restructuring and Related Charges
Number of employees expected to be reduced			22
Summary of various restructuring plans
Restructuring expenses			3.1
NSE Lease Restructuring Plan (second floor)
Summary of various restructuring plans
Accrual balance at the beginning of the period				5.0					5.0
Restructuring expenses									(0.9)
Cash Settlements									(2.2)
Non-cash settlements and other adjustments									0.2
Accrual balance at the end of the period	2.1								2.1
Other plans
Summary of various restructuring plans
Accrual balance at the beginning of the period				0.5					0.5
Restructuring expenses									1.0
Cash Settlements									(1.5)
NSE Operation and Repair Outsourcing Restructuring Plan
Summary of various restructuring plans
Accrual balance at the beginning of the period				2.1					2.1
Restructuring expenses									0.2
Cash Settlements									(1.8)
Accrual balance at the end of the period	0.5								0.5
Other plans
Summary of various restructuring plans
Accrual balance at the beginning of the period				0.6					0.6
Cash Settlements									(0.2)
Accrual balance at the end of the period	0.4								0.4
Plans Prior to Fiscal 2012
Summary of various restructuring plans
Accrual balance at the beginning of the period				2.9					2.9
Restructuring expenses									0.4
Cash Settlements									(1.8)
Non-cash settlements and other adjustments									0.1
Accrual balance at the end of the period	1.6								1.6
Germantown and Beijing | NSE Lease Restructuring Plan (second floor)
Restructuring and Related Charges
Contractual obligations under the operating lease, net of sublease income, fair value	2.1								2.1
Summary of various restructuring plans
Restructuring expenses									0.9
Germantown, Maryland | NSE Lease Restructuring Plan (first floor)
Restructuring and Related Charges
Contractual obligations under the operating lease, net of sublease income, fair value	6.9								6.9
Workforce Reduction | NSE Realignment Plan (Workforce Reduction)
Restructuring and Related Charges
Number of employees expected to be reduced	123
Summary of various restructuring plans
Restructuring expenses									4.6
Accrual balance at the end of the period	4.6								4.6
Workforce Reduction | CCOP Serangoon Closure Plan (Workforce Reduction)
Restructuring and Related Charges
Number of employees expected to be reduced	50
Summary of various restructuring plans
Restructuring expenses									1.7
Accrual balance at the end of the period	1.7								1.7
Workforce Reduction | Shared Services Restructuring Plan (Workforce Reduction)
Restructuring and Related Charges
Number of employees expected to be reduced	48
Summary of various restructuring plans
Restructuring expenses									1.8
Accrual balance at the end of the period	1.8								1.8
Workforce Reduction | NSE Product Strategy Restructuring Plan
Restructuring and Related Charges
Number of employees expected to be reduced		63
Summary of various restructuring plans
Restructuring expenses									7.2
Cash Settlements									(2.8)
Accrual balance at the end of the period	4.4								4.4
Workforce Reduction | Central Finance and IT Restructuring Plan (Workforce Reduction)
Summary of various restructuring plans
Restructuring expenses									3.1
Cash Settlements									(1.6)
Accrual balance at the end of the period	1.5								1.5
Workforce Reduction | OSP Operational Realignment Plan (Workforce Reduction)
Restructuring and Related Charges
Number of employees expected to be reduced					126				78
Summary of various restructuring plans
Accrual balance at the beginning of the period				3.7					3.7
Restructuring expenses									(0.6)
Cash Settlements									(3.0)
Accrual balance at the end of the period	0.1				3.7				0.1	3.7
Workforce Reduction | CCOP Outsourcing Plan
Restructuring and Related Charges
Number of employees expected to be reduced						43
Summary of various restructuring plans
Accrual balance at the beginning of the period				0.7					0.7
Cash Settlements									(0.2)
Accrual balance at the end of the period	0.5								0.5
Workforce Reduction | NSE Wireless Business Restructuring Plan (Workforce Reduction)
Restructuring and Related Charges
Number of employees expected to be reduced									62
Summary of various restructuring plans
Accrual balance at the beginning of the period				1.0					1.0
Restructuring expenses									0.1
Cash Settlements									(1.0)
Accrual balance at the end of the period	0.1								0.1
Workforce Reduction | NSE Operation and Repair Outsourcing Restructuring Plan
Restructuring and Related Charges
Number of employees expected to be reduced									162
Summary of various restructuring plans
Accrual balance at the beginning of the period				2.0					2.0
Restructuring expenses									0.3
Cash Settlements									(1.8)
Accrual balance at the end of the period	0.5								0.5
Workforce Reduction | NSE Germany Restructuring Plan
Summary of various restructuring plans
Accrual balance at the end of the period	1.0								1.0
Ottawa Lease Exit Costs
Restructuring and Related Charges
Contractual obligations under the operating lease, net of sublease income, fair value	3.1				3.7				3.1	3.7
Summary of various restructuring plans
Accrual balance at the beginning of the period				3.7					3.7
Restructuring expenses									0.7
Cash Settlements									(1.3)
Accrual balance at the end of the period	3.1								3.1
Lease Costs | NSE Operation and Repair Outsourcing Restructuring Plan
Summary of various restructuring plans
Accrual balance at the beginning of the period				0.1					0.1
Restructuring expenses									$ (0.1)