Other - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions			1 Months Ended	3 Months Ended					6 Months Ended
	Jun. 26, 2016	Feb. 20, 2015	May 31, 2016	Jun. 26, 2016	Mar. 27, 2016	Dec. 31, 2015	Sep. 27, 2015	Jun. 28, 2015	Jun. 26, 2016	Jun. 28, 2015
Increase in operating profit due to profit rate adjustments				$ 435				$ 550	$ 840	$ 1,000
Increase in net earnings due to profit rate adjustments				$ 280				$ 355	$ 545	$ 675
Increase in diluted earnings per common share due to profit rate adjustments				$ 0.91				$ 1.12	$ 1.77	$ 2.12
Repayment of long-term notes									$ 452
Severance charges					$ 99	$ 102	$ 102		$ 99
Effective income tax rate				27.10%				30.80%	24.30%	30.70%
Cash paid for repurchases of common stock									$ 1,002	$ 1,541
Number of shares of common stock repurchased with cash									4.5
Remaining authorized repurchase amount under share repurchase program	$ 2,600			$ 2,600					$ 2,600
Additional paid-in capital	$ 0			$ 0		$ 0			$ 0
Common stock par value, per share	$ 1			$ 1		$ 1			$ 1
Dividends declared				$ 1,000				$ 942	$ 1,519	$ 1,419
Dividends declared, per share (in USD)				$ 3.30				$ 3.00	$ 4.95	$ 4.50
Deferred income taxes assets, noncurrent	$ 5,830			$ 5,830		$ 5,931			$ 5,830
Variable Interest Rate Swap | Designated as hedges
Aggregate notional amount of derivatives			$ 450
Sikorsky Aircraft Corporation
Restructuring cost expected in 2016	40			40					40
Restructuring cost incurred									15
Restructuring cost expected to be incurred	25			25					25
2015 Action
Severance charges				17
Severance payments	49
2016 Action
Severance payments	$ 34
2016 Third Quarter Dividend
Dividends declared									$ 503
Dividends declared, per share (in USD)									$ 1.65
2015 Third Quarter Dividend
Dividends declared										$ 471
Dividends declared, per share (in USD)										$ 1.50
Restricted Stock Units (RSUs)
Number of stock units, granted, in shares									0.7
Average grant date fair value per unit									$ 206.69
Number of years over which equity awards vest									3 years
Accounting Standards Update 2015-17 | Scenario, Previously Reported
Deferred income taxes assets, current						1,600
Deferred income taxes liabilities, current						140
Accounting Standards Update 2015-17 | Restatement Adjustment
Deferred income taxes assets, noncurrent						1,600
Deferred income taxes liabilities, noncurrent						140
Accounting Standards Update 2016-09 | Adjustments for New Accounting Principle, Early Adoption
Excess income tax benefit from share-based compensation, financing activities				104
Excess income tax benefit recognized in additional paid-in capital				104
Accounting Standards Update 2016-09 | Restatement Adjustment | Adjustments for New Accounting Principle, Early Adoption
Excess income tax benefit from share-based compensation, operating activities				11					$ 115
Additional income tax benefit				$ 11					$ 115
Additional income tax benefit, per share				$ 0.04					$ 0.37
7.65% Long-term notes
Repayment of long-term notes			$ 452
Long-term notes, fixed Interest			7.65%
February Twenty Fifteen Notes
Amount of issued debt		$ 2,250
2.90% Notes Due 2025
Amount of issued debt		$ 750
Long-term debt maturity year		2025
Interest Rate		2.90%
3.60% Notes Due 2035
Amount of issued debt		$ 500
Long-term debt maturity year		2035
Interest Rate		3.60%
3.80% Notes Due 2045
Amount of issued debt		$ 1,000
Long-term debt maturity year		2045
Interest Rate		3.80%
Mission Systems and Training
Severance charges						67	67
Information Systems & Global Solutions
Severance charges					19	$ 35	$ 35
Aeronautics
Severance charges					$ 80