Commitments and Contingency - Additional Information (Detail) (USD $)		6 Months Ended		6 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013 European Land Systems [Member] Vehicle	Dec. 31, 2012 European Land Systems [Member] Performance Guarantee [Member]	Jun. 30, 2013 Termination Of A-12 Program	Dec. 31, 2012 Contract Termination [Member] European Land Systems [Member]	Jun. 30, 2013 Minimum Termination Of A-12 Program	Jun. 30, 2013 Maximum
Commitments and Contingencies [Line Items]
Maximum amount contractors collectively would be required to repay the government				$ 1,400,000,000
Duration of litigation (in years)						20 years
Interest on maximum amount contractors collectively would be required to pay the government				1,600,000,000
Loss contingency, maximum liability, pretax				1,500,000,000
Discontinued operations charge, after-tax				840,000,000
Discontinued operations charge, per share, after-tax				$ 2.38
Cash cost, after-tax				745,000,000
Number of vehicles specified in contract		260
Bank Guarantee Liability			75,000,000
Accounts receivable and contracts in process		195,000,000
Loss Contingency, Estimate of Possible Loss					258,000,000
Letters of credit	$ 1,800,000,000
Period preceding delivery of aircraft to customer fair market value of trade-in aircraft is established, days, maximum							120 days