Debt - Debt Acquired in Acquisition of Herley (Details) (USD $) In Millions, unless otherwise specified			0 Months Ended
	Jun. 24, 2012	Dec. 25, 2011	Mar. 25, 2011 10-year term loan	Jun. 24, 2012 10-year term loan
Debt Instrument [Line Items]
Principal	$ 631.2	$ 631.8	$ 10.0
Maturity period			10 years
Carrying amount	652.0	654.6		6.2
Quarterly installment payment - principal			$ 0.3
Basis spread on variable rate			1.50%