Receivables (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 27, 2014	Sep. 28, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amounts billed under long term contracts to U.S. government	$ 125,497	$ 133,149
Unbilled Recoverable costs and accrued profits to be billed to U.S. Government.	313,530	337,520
Percent of unbilled amounts excepted to be collected within one year	75.00%
Accounts Receivable, Unapproved Contract Claims	0
Contract Receivable Retainage	0
Boeing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables from Boeing	147,421	182,050
UNITED STATES | Government [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amounts billed under long term contracts to U.S. government	16,929	11,532
Unbilled Recoverable costs and accrued profits to be billed to U.S. Government.	$ 15,816	$ 11,963