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Arrangements With Off-Balance Sheet Risk (Schedule Of Arrangements With Off-Balance Sheet Risk) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Contingent Repurchase Commitment [Member]
   
Guarantor Obligations [Line Items]    
Maximum Potential Payments $ 1,872 $ 2,065
Estimated Proceeds from Collateral/ Recourse 1,871 2,065
Carrying Amount of Liabilities 5 5
Contributed Delta Program Launch Inventory [Member]
   
Guarantor Obligations [Line Items]    
Maximum Potential Payments 127 137
Contract Pricing [Member]
   
Guarantor Obligations [Line Items]    
Maximum Potential Payments 261 261
Carrying Amount of Liabilities 7 7
Other Delta Contracts [Member]
   
Guarantor Obligations [Line Items]    
Maximum Potential Payments 227 232
Carrying Amount of Liabilities 8 8
Other Indemnifications [Member]
   
Guarantor Obligations [Line Items]    
Maximum Potential Payments 106 137
Carrying Amount of Liabilities 28 32
Credit Guarantees [Member]
   
Guarantor Obligations [Line Items]    
Maximum Potential Payments 35 13
Estimated Proceeds from Collateral/ Recourse 27 4
Carrying Amount of Liabilities $ 2 $ 2