Other - Additional Information (Detail) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	1 Months Ended	3 Months Ended				9 Months Ended						3 Months Ended			9 Months Ended		3 Months Ended	1 Months Ended
	Apr. 30, 2013	Sep. 29, 2013	Jun. 30, 2013	Sep. 30, 2012		Sep. 29, 2013		Sep. 30, 2012		Sep. 26, 2013	Dec. 31, 2012	Mar. 31, 2013 Tax Benefit Attributable to 2012	Sep. 29, 2013 Fourth Quarter 2013	Sep. 30, 2012 Former Electronic Systems	Sep. 30, 2012 Former Electronic Systems	Sep. 29, 2013 Information Systems & Global Solutions	Dec. 31, 2012 Aeronautics	Jan. 31, 2013 Restricted Stock Units (RSUs)	Jan. 31, 2013 Performance Shares	Jan. 31, 2013 Performance Shares Half Of PSUs Granted In Period	Jan. 31, 2013 Performance Shares Remaining Half Of PSUs Granted In Period
Increase in segment operating profit, net of state taxes, from the impact of changes in net profit booking rate adjustments and other matters		$ 510,000,000		$ 430,000,000		$ 1,600,000,000		$ 1,500,000,000
Increase in net earnings from the impact of changes in net profit booking rate adjustments and other matters		330,000,000		280,000,000		1,000,000,000		980,000,000
Increase in diluted earnings per share from the impact of changes in net profit booking rate adjustments and other matters		$ 1.01		$ 0.85		$ 3.12		$ 2.98
Cash paid for repurchases of common stock						1,533,000,000		708,000,000
Number of shares of common stock repurchased with cash						14.5
Value of stock repurchased under share repurchase program						1,563,000,000		722,000,000
Number of shares repurchased under share repurchase program						14.7
Additional share repurchase program authorized amount										3,000,000,000
Remaining authorized repurchase amount under share repurchase program						3,800,000,000
Common stock par value, per share		$ 1				$ 1					$ 1
Number of stock units, granted, in shares																		1.4	0.3
Average grant date fair value per unit																		$ 89.24		$ 89.24	$ 61.13
Number of years over which equity awards vest																		3 years	3 years
Dividends declared				706,000,000		1,559,000,000		1,365,000,000					434,000,000
Dividends declared, per share (in USD)			$ 1.15	$ 2.15		$ 4.78		$ 4.15					$ 1.33
Percentage increase in per share quarterly dividend declared													16.00%
Effective income tax rates from continuing operations		28.20%		30.50%		27.80%		30.10%
Recognized tax benefit for the impact of the tax credit												37,000,000
Increase in diluted earnings per share due to R&D tax credit												$ 0.11
Federal and foreign income tax payments made, net of refunds received						387,000,000		892,000,000
Refund received from the IRS						550,000,000
Net earnings from discontinued operations		31,000,000				31,000,000
Severance charges				23,000,000	[1]	30,000,000	[1]	23,000,000	[1]					23,000,000	23,000,000	30,000,000	25,000,000
Reduction in net earnings due to severance charges														15,000,000	15,000,000	19,000,000
Decrease in diluted earnings per share due to severance charges														$ 0.05	$ 0.05	$ 0.06
Long term debt repayment	$ 150,000,000					$ 150,000,000
Long term debt fixed interest rate	7.38%

[1] Severance charges during the nine months ended September 29, 2013 consisted of amounts, net of state tax benefits, associated with the elimination of certain positions at our IS&GS business segment during the quarter ended March 31, 2013. Severance charges during the quarter and nine months ended September 30, 2012 consisted of amounts, net of state tax benefits, associated with the elimination of certain positions at our former Electronic Systems business segment (Note 8, under the caption "Severance Activities"). Severance charges for initiatives that are not significant are included in business segment operating profit.