Accounts Receivable (Schedule Of Accounts Receivable) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivables [Line Items]
Less valuation allowance, Current	$ (82)	$ (53)
Accounts receivable, Net, Current	5,608	5,793
U S Government Contracts [Member]
Accounts, Notes, Loans and Financing Receivables [Line Items]
Accounts Receivable, Gross, Current	2,788	2,950
Defense, Space & Security customers [Member]
Accounts, Notes, Loans and Financing Receivables [Line Items]
Accounts Receivable, Gross, Current	1,196	1,100
Commercial Airplanes customers [Member]
Accounts, Notes, Loans and Financing Receivables [Line Items]
Accounts Receivable, Gross, Current	903	827
Reinsurance Receivables [Member]
Accounts, Notes, Loans and Financing Receivables [Line Items]
Accounts Receivable, Gross, Current	509	585
Other [Member]
Accounts, Notes, Loans and Financing Receivables [Line Items]
Accounts Receivable, Gross, Current	$ 294	$ 384