Supplementary Consolidations Balance Sheet (Details) (USD $) In Millions, unless otherwise specified	Sep. 28, 2012	Sep. 17, 2012	Mar. 07, 2012	Sep. 30, 2011	Mar. 09, 2011	May 14, 2010	Mar. 10, 2010
Supplementary Consolidated Balance Sheet Information
Contracts in process	$ 360			$ 299
Other	490			367
Prepaid expenses and other current assets	850			666
Deferred tax asset-non current	398			833
Other	806			1,035
Other assets	1,204			1,868
Accrued payroll and payroll related costs	296			350
Deferred income tax liability-current	10			22
Income taxes payable-current	126			98
Accrued Dividends	139	139	231	232	468	28	399
Other	1,217			1,092
Accrued and other current liabilities	1,788			1,794
Long-term pension and postretirement liabilities	593			516
Deferred income tax liability-non-current	211			294
Income taxes payable-non-current	124			112
Other	1,413			1,329
Other liabilities	$ 2,341			$ 2,251