Goodwill (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended				12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended			12 Months Ended							12 Months Ended	3 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 30, 2012	Jun. 30, 2012 ASG	Jun. 29, 2013 GenComm Co. Ltd. ("GenComm")	Aug. 17, 2012 GenComm Co. Ltd. ("GenComm")	Jun. 29, 2013 Arieso	Mar. 07, 2013 Arieso	Jun. 28, 2014 Trendium	Dec. 10, 2013 Trendium	Jun. 28, 2014 Network Instruments LLC	Jan. 06, 2014 Network Instruments LLC	Jun. 28, 2014 Time-Bandwidth Products AG ("Time-Bandwidth")	Jan. 27, 2014 Time-Bandwidth Products AG ("Time-Bandwidth")	Jun. 28, 2014 Network and Service Enablement	Jun. 29, 2013 Network and Service Enablement	Jun. 30, 2012 Network and Service Enablement	Jun. 29, 2013 Network and Service Enablement GenComm Co. Ltd. ("GenComm")	Jun. 29, 2013 Network and Service Enablement Arieso	Jun. 28, 2014 Network and Service Enablement Trendium	Jun. 28, 2014 Network and Service Enablement Network Instruments LLC	Jun. 28, 2014 Communications and Commercial Optical Products	Jun. 29, 2013 Communications and Commercial Optical Products	Jun. 30, 2012 Communications and Commercial Optical Products	Jun. 28, 2014 Communications and Commercial Optical Products Time-Bandwidth Products AG ("Time-Bandwidth")	Sep. 29, 2012 Optical Security and Performance Products item	Jun. 28, 2014 Optical Security and Performance Products	Jun. 29, 2013 Optical Security and Performance Products	Jun. 30, 2012 Optical Security and Performance Products	Jun. 30, 2012 Advanced Optical Technologies
Changes in goodwill
Balance at the beginning of the period	$ 115.1	$ 68.7		$ 0		$ 5.7		$ 40.8		$ 14.4		$ 125.7		$ 5.8	$ 106.8		$ 60.4										$ 8.3	$ 8.3		$ 8.3
Goodwill acquired from acquisition					5.7		40.7		14.4		125.7		5.8					5.7	40.7	14.4	125.7				5.8
Currency translation and other adjustments	6.0														5.9							0.1
Balance at the end of the period	267.0	115.1	68.7	0		5.7		40.8		14.4		125.7		5.8	252.8		60.4					5.9					8.3	8.3		8.3
Number of reporting units																										1
Gross goodwill and accumulated impairment balances
Gross goodwill balance	5,945.9	5,794.0													735.9	589.9	543.5					5,117.2	5,111.3	5,111.3			92.8	92.8	92.8
Accumulated impairment losses	(5,678.9)	(5,678.9)													(483.1)	(483.1)	(483.1)					(5,111.3)	(5,111.3)	(5,111.3)			(84.5)	(84.5)	(84.5)
Net goodwill balance	267.0	115.1	68.7	0		5.7		40.8		14.4		125.7		5.8	252.8		60.4					5.9					8.3	8.3		8.3
Impairment of goodwill	$ 0	$ 0	$ 0