Commitments and Contingencies Revenue Sharing Agreement with the Commonwealth of Australia (Details) (USD $) In Millions, unless otherwise specified		9 Months Ended
	May 08, 2013 Equipment	Sep. 26, 2014 Commonwealth of Australia [Member] Revenue Sharing Agreement [Member] SH 2GA Super Seasprite Program [Member]	Sep. 26, 2014 Revenue Sharing Agreement [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual, Payments			$ 5.3
SH 2G(I) New Zealand Contract Value	120.6
SH-2G(I) Aircraft Sold	10
Cumulative Payments, Contractual Obligation		$ 32.1