Goodwill (Details) (USD $)	3 Months Ended					9 Months Ended			3 Months Ended
	Jun. 30, 2012	Mar. 30, 2013	Jun. 30, 2012 ASG	Mar. 30, 2013 Communications Test and Measurement	Jun. 30, 2012 Communications Test and Measurement	Mar. 30, 2013 Communications Test and Measurement Gen Comm Co., Ltd ("GenComm")	Mar. 30, 2013 Communications Test and Measurement Arieso	Jun. 30, 2012 Advanced Optical Technologies	Sep. 29, 2012 Optical Security and Performance Products item	Mar. 30, 2013 Optical Security and Performance Products
Goodwill
Impairment of goodwill	$ 0
Changes in goodwill
Balance at the beginning of the period		114,800,000	0	106,500,000	60,400,000			8,300,000		8,300,000
Goodwill from acquisition						5,700,000	40,400,000
Balance at the end of the period	$ 68,700,000	$ 114,800,000	$ 0	$ 106,500,000	$ 60,400,000			$ 8,300,000		$ 8,300,000
Number of reporting units									1