Commitments and Contingencies Revenue Sharing Agreement with the Commonwealth of Australia (Details)			9 Months Ended
	Sep. 28, 2012 Foreign Exchange Contract Two [Member] Other Liabilities [Member] USD ($)	Feb. 12, 2009 Foreign Exchange Contract Two [Member] Other Liabilities [Member] AUD	Sep. 28, 2012 Commonwealth of Australia [Member] Revenue Sharing Agreement [Member] SH-2G(A) Super Seasprite Program [Member] AUD	Sep. 28, 2012 Commonwealth of Australia [Member] Revenue Sharing Agreement [Member] Future Payments for Revenue Sharing Agreement [Member] SH-2G(A) Super Seasprite Program [Member] AUD	Sep. 28, 2012 Commonwealth of Australia [Member] Revenue Sharing Agreement [Member] Future Payments for Revenue Sharing Agreement [Member] SH-2G(A) Super Seasprite Program [Member] USD ($)	Sep. 28, 2012 Letter of Credit [Member] Commonwealth of Australia [Member] Revenue Sharing Agreement [Member] SH-2G(A) Super Seasprite Program [Member] USD ($)
Loss Contingencies [Line Items]
Contractual obligation	$ 3,500,000	39,500,000
Cumultive payments, contractual obligation			33,100,000
Contractual Obligation, Due in Next Twelve Months				6,400,000	6,700,000
Contractual Obligation, Expected, Year Two				39,500,000
Letters of Credit Outstanding, Amount						$ 6,700,000