Legal Proceedings (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended		0 Months Ended
	Jun. 30, 2013 employee	Dec. 31, 2012	Mar. 31, 1998 A12 Program [Member]	Jun. 30, 2013 A12 Program [Member]	Dec. 31, 2012 A12 Program [Member]	Jun. 30, 2013 A12 Program [Member] Unliquidated Progress Payments [Member]	Dec. 29, 2009 A12 Program [Member] Unliquidated Progress Payments [Member]	Jun. 30, 2013 A12 Program [Member] Program Termination [Member]	Jun. 30, 2013 A12 Program [Member] Interest On Unliquidated Progress Payments [Member]
Legal Proceedings [Line Items]
Long-term contracts in progress	$ 14,983	$ 15,130		$ 587
Inventory Valuation Reserves				350
Loss Contingency, Damages Awarded, Value			1,200
Loss Contingency, Estimate of Possible Loss				1,745		1,350	1,352	275	1,595
Inventory subject to uncertainty				237	237
Unrecorded gain contingency				$ 1,191
Individual Asserted Legal Claims	89
Employees Formally Employed at Wichita Facility	2,000