Revenue Accounting for Contracts / Accounting for Joint Ventures (Subcontractor Costs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 29, 2012	Jul. 01, 2011	Jun. 29, 2012	Jul. 01, 2011
Revenue Accounting for Contracts / Accounting for Joint Ventures [Abstract]
Pass-through costs included in revenues	$ 583,136	$ 486,010	$ 1,699,188	$ 1,561,858