Arrangements With Off-Balance Sheet Risk (Narrative) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended																12 Months Ended
	Dec. 31, 2011	Jun. 30, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 ULA [Member]	Dec. 31, 2013 Contributed Delta Program Launch Inventory [Member]	Dec. 31, 2012 Contributed Delta Program Launch Inventory [Member]	Dec. 31, 2013 Indemnification Agreement [Member] satellites	Dec. 31, 2013 Indemnification Agreement [Member] Indemnification Payment [Member]	Dec. 31, 2013 Indemnification Agreement [Member] Boeing Portion Of Additional Contract Losses [Member]	Dec. 31, 2013 Other Delta Contracts [Member]	Dec. 31, 2012 Other Delta Contracts [Member]	Dec. 31, 2013 Other Delta Contracts [Member] Deferred support costs [Member]	Dec. 31, 2013 Deferred Support and Production Costs [Member]	Dec. 31, 2013 Other Indemnifications [Member]	Dec. 31, 2012 Other Indemnifications [Member]	Dec. 31, 2013 Credit Guarantees [Member]	Dec. 31, 2012 Credit Guarantees [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Delta launch program inventories included in contributed assets					$ 1,360
Delta launch program inventories subject to an inventory supply agreement					1,860
Contributed inventories consumed by ULA					1,233
Maximum Potential Payments						127	137				227	232	85		106	137	35	13
Inventory Supply Agreement Payments Received					1,380
Inventory Supply Agreement Revenue and Costs of Sales Recorded					1,049
Number of satellite missions								3
Maximum exposure to loss								278	261	17
Potentially Unrecoverable Costs Under Contracts	114	271
Loss contingency, estimate of possible loss														317
Carrying Amount of Liabilities											8	8			28	32	2	2
Guarantor Obligations, Term																	7
IRB asset, net of capital lease obligation			$ 690	$ 738