Income Taxes (Components Of Federal And Foreign Deferred Tax Assets And Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Deferred tax assets related to:
Accrued compensation and benefits	$ 843		$ 877
Pensions	4,578		3,642
Other postretirement benefit obligations	487		459
Contract accounting methods	806		531
Sale of discontinued operations	69		179
Foreign company operating losses and credits	31		31
Other	305		202
Valuation allowance	(14)	[1]	(17)	[1]
Deferred tax asset, net	7,105		5,904
Deferred tax liabilities related to:
Goodwill and purchased intangibles	369		336
Property, plant and equipment	638		558
Exchanged debt securities and other	379	[2]	391	[2]
Deferred tax liabilities	1,386		1,285
Net deferred tax assets	$ 5,719	[3]	$ 4,619	[3]

[1] A valuation allowance has been provided against certain foreign company deferred tax assets arising from carryforwards of unused tax benefits.

[2] Includes deferred tax liabilities associated with the exchange of debt securities in 2010 (see Note 9) and 2006.

[3] Includes net foreign current deferred tax liabilities, which are included on the Balance Sheets in other current liabilities.