Legal Proceedings (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended		0 Months Ended
	Sep. 30, 2013 employee	Dec. 31, 2012	Mar. 31, 1998 A12 Program [Member]	Sep. 30, 2013 A12 Program [Member]	Dec. 31, 2012 A12 Program [Member]	Sep. 30, 2013 A12 Program [Member] Unliquidated Progress Payments [Member]	Dec. 29, 2009 A12 Program [Member] Unliquidated Progress Payments [Member]	Sep. 30, 2013 A12 Program [Member] Program Termination [Member]	Sep. 30, 2013 A12 Program [Member] Interest On Unliquidated Progress Payments [Member]
Legal Proceedings [Line Items]
Long-term contracts in progress	$ 13,872	$ 15,130		$ 587
Inventory Valuation Reserves				350
Loss Contingency, Damages Awarded			1,200
Loss Contingency, Estimate of Possible Loss				1,748		1,350	1,352	275	1,600
Inventory subject to uncertainty				237	237
Unrecorded gain contingency				$ 1,193
Individual Asserted Legal Claims	88
Employees Formerly Employed at Wichita Facility	2,000