Goodwill (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended			9 Months Ended		9 Months Ended		9 Months Ended					9 Months Ended
	Jun. 29, 2013	Mar. 29, 2014	Mar. 29, 2014 Trendium	Dec. 10, 2013 Trendium	Mar. 29, 2014 Network Instruments	Jan. 06, 2014 Network Instruments	Mar. 29, 2014 Time-Bandwidth Products	Jan. 27, 2014 Time-Bandwidth Products	Mar. 29, 2014 Network and Service Enablement	Mar. 29, 2014 Network and Service Enablement Trendium	Mar. 29, 2014 Network and Service Enablement Network Instruments	Mar. 29, 2014 Optical Security and Performance Products	Jun. 29, 2013 Optical Security and Performance Products	Mar. 29, 2014 Communications and Commercial Optical Products	Mar. 29, 2014 Communications and Commercial Optical Products Time-Bandwidth Products
Changes in goodwill
Balance at the beginning of the period		$ 115.1		$ 14.4		$ 124.4		$ 6.3	$ 106.8			$ 8.3	$ 8.3
Goodwill acquired from acquisition			14.4		124.4		6.3			14.4	124.4			6.5	6.3
Currency translation and other adjustments		4.4							4.2					0.2
Balance at the end of the period	115.1	264.6		14.4		124.4		6.3	249.8			8.3	8.3	6.5
Impairment of goodwill	$ 0