Restructuring and Related Charges (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended			3 Months Ended	6 Months Ended		3 Months Ended	6 Months Ended		3 Months Ended	6 Months Ended				6 Months Ended					3 Months Ended		3 Months Ended	6 Months Ended		3 Months Ended	6 Months Ended			3 Months Ended	6 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 29, 2012	Dec. 31, 2011	Jun. 30, 2012	Dec. 29, 2012 CommTest Wireless Business Restructuring Plan	Dec. 29, 2012 CommTest Wireless Business Restructuring Plan employee	Dec. 29, 2012 CCOP CPV Plan employee	Dec. 29, 2012 CommTest Operation and Repair Outsourcing Restructuring Plan employee	Dec. 29, 2012 CommTest Operation and Repair Outsourcing Restructuring Plan employee	Dec. 29, 2012 OSP Business Consolidation Plan employee	Dec. 29, 2012 CommTest Manufacturing Support Consolidation Plan employee	Dec. 29, 2012 CommTest Manufacturing Support Consolidation Plan employee	Dec. 29, 2012 CommTest Manufacturing Support Consolidation Plan Communications Test and Measurement employee	Dec. 29, 2012 CommTest Germantown Restructuring Plan	Jun. 30, 2012 CommTest Germantown Restructuring Plan	Dec. 29, 2012 CommTest Market Rebalancing Restructuring Plan	Dec. 29, 2012 CommTest US Manufacturing Outsourcing Restructuring Plan	Dec. 29, 2012 CommTest Germany Restructuring Plan	Dec. 29, 2012 Other plans	Dec. 29, 2012 Maryland and Indiana in the United States CommTest US Manufacturing Outsourcing Restructuring Plan Communications Test and Measurement	Jun. 27, 2009 Germany CommTest Germany Restructuring Plan Communications Test and Measurement employee	Dec. 29, 2012 Germany CommTest Germany Restructuring Plan Communications Test and Measurement employee	Dec. 29, 2012 Workforce reduction CommTest Operation and Repair Outsourcing Restructuring Plan	Dec. 29, 2012 Workforce reduction CommTest Operation and Repair Outsourcing Restructuring Plan	Dec. 29, 2012 Workforce reduction Other plans	Dec. 29, 2012 Facilities and Equipment CommTest Operation and Repair Outsourcing Restructuring Plan	Dec. 29, 2012 Facilities and Equipment CommTest Operation and Repair Outsourcing Restructuring Plan	Dec. 29, 2012 Lease Costs CommTest Operation and Repair Outsourcing Restructuring Plan	Dec. 29, 2012 Lease Costs Other plans	Dec. 29, 2012 Ottawa Lease Exit Costs	Dec. 29, 2012 Ottawa Lease Exit Costs
Restructuring and Related Charges
Number of employees expected to be reduced							43	10	22	133	16	5		80								77
Number of positions eliminated as of the balance sheet date							38	9		107	11		53
Additional severance and employee benefits									$ 0.6			$ 0.4
Number of positions eliminated as of the balance sheet date																							74
Contractual obligations under the operating lease, net of sublease income, fair value	4.3		4.3		4.6				0.2	0.2					0.5		0.7				0.9
Summary of various restructuring plans
Accrual balance at the beginning of the period			12.6							3.9	0.8		2.5		0.5	0.5	0.9	1.1	2.4	0.5					3.9	0.4				0.1		4.6
Restructuring and related charges	3.0	4.0	5.7	5.5		1.8	1.8	0.6	0.8	2.7		0.4	0.5						0.1					0.6	1.5		0.2	0.7	0.5		0.1	0.2
Cash Settlements			(9.8)				(1.0)	(0.4)		(4.8)	(0.6)		(2.0)				(0.2)	(0.2)	(0.3)	(0.3)					(3.8)	(0.3)		(0.7)	(0.3)			(0.6)
Non-cash settlements and other adjustments			0.6																0.2	0.4										0.4		0.1
Accrual balance at the end of the period	$ 9.1		$ 9.1			$ 0.8	$ 0.8	$ 0.2	$ 1.8	$ 1.8	$ 0.2	$ 1.0	$ 1.0		$ 0.5	$ 0.5	$ 0.7	$ 0.9	$ 2.4	$ 0.6				$ 1.6	$ 1.6	$ 0.1			$ 0.2	$ 0.5	$ 4.3	$ 4.3