Arrangements With Off-Balance Sheet Risk (Quantitative Data Regarding Our Third-Party Guarantees) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Contributed Delta Program Launch Inventory [Member]
Guarantor Obligations [Line Items]
Maximum Potential Payments	$ 215	$ 187
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	137	83
Carrying Amount of Liabilities	8	16
Other Indemnifications [Member]
Guarantor Obligations [Line Items]
Maximum Potential Payments	212	232
Carrying Amount of Liabilities	51	82
Credit Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum Potential Payments	17	71
Estimated Proceeds from Collateral/Recourse	12	63
Carrying Amount of Liabilities	2	6
Residual Value Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum Potential Payments	29	29
Estimated Proceeds from Collateral/Recourse	21	21
Carrying Amount of Liabilities	6	6
Contingent Repurchase Commitments [Member]
Guarantor Obligations [Line Items]
Maximum Potential Payments	3,290	3,782
Estimated Proceeds from Collateral/Recourse	3,290	3,759
Carrying Amount of Liabilities	$ 7	$ 7