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Income Taxes (Components Of Net Deferred Tax Assets) (Details) (USD $) In Thousands | Sep. 30, 2011 | Oct. 01, 2010
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Income Taxes |  |
Defined benefit pension plans | $ 80,632 | $ 108,826
Other employee benefit plans | 151,855 | 137,810
Self-insurance programs | 14,999 | 19,481
Contract revenues and costs | 15,333 | 13,602
Foreign tax credits carryforward | 320 | 14,305
Other | 9,081 | 10,719
Gross deferred tax assets | 272,220 | 304,743
Depreciation and amortization | (130,536) | (81,693)
Other, net | (7,068) | (792)
Gross deferred tax liabilities | (137,604) | (82,485)
Net deferred tax assets | $ 134,616 | $ 222,258

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