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Significant Accounting Policies - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
 2 Months Ended 3 Months Ended 12 Months Ended
Nov. 06, 2015
Dec. 31, 2015
Dec. 31, 2015
Sep. 27, 2015
Jun. 28, 2015
Mar. 29, 2015
Dec. 31, 2014
Sep. 28, 2014
Jun. 29, 2014
Mar. 30, 2014
Dec. 31, 2013
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Significant Accounting Policies [Line Items]                            
Acquisitions of businesses and investments in affiliates                       $ 9,003 $ 898 $ 269
Operating profit     $ 1,281 [1] $ 1,354 $ 1,445 $ 1,356 $ 1,342 $ 1,392 $ 1,426 $ 1,432   5,436 5,592 4,505
Net earnings     $ 933 [1],[2] $ 865 [2] $ 929 [2] $ 878 [2] $ 904 [3] $ 888 [3] $ 889 [3] $ 933 [3]   $ 3,605 $ 3,614 $ 2,981
Diluted earnings per share     $ 3.01 [1] $ 2.77 $ 2.94 $ 2.74 $ 2.82 $ 2.76 $ 2.76 $ 2.87   $ 11.46 $ 11.21 $ 9.13
Independent research and development costs charged to cost of sales                       $ 839 $ 751 $ 697
Number of years over which stock awards vest                       3 years    
Depreciation                       $ 738 739 714
Capitalized internal-use software, net   $ 481 $ 481       $ 547         481 547  
Capitalized internal-use software accumulated amortization   1,900 1,900       1,800         1,900 1,800  
Non-cash goodwill impairment charge             119       $ 195   119 [4],[5] 195 [5]
Reduction in net earnings due to non-cash goodwill impairment charge             $ 107       $ 176      
Decrease in diluted earnings per share due to non-cash goodwill impairment charge             $ 0.33       $ 0.54      
Debt issuance cost                       $ 95 27  
Time period environmental costs and recovery of environmental costs are projected over, years                       20 years    
Fair value of trading securities   1,100 1,100       $ 1,100         $ 1,100 1,100  
Net gains (losses) on marketable securities                       (11) 65 64
Total equity method investments   1,300 1,300       971         1,300 971  
Net earnings from equity method investments                       343 342 321
Contracts Accounted for under Percentage of Completion                            
Significant Accounting Policies [Line Items]                            
Operating profit                       1,900 1,800 2,100
Net earnings                       $ 1,200 $ 1,100 $ 1,300
Diluted earnings per share                       $ 3.87 $ 3.55 $ 4.09
Minimum                            
Significant Accounting Policies [Line Items]                            
Acquired finite-lived intangible assets are amortized                       3 years    
Maximum                            
Significant Accounting Policies [Line Items]                            
Acquired finite-lived intangible assets are amortized                       20 years    
Interest rate swaps | Designated as hedges                            
Significant Accounting Policies [Line Items]                            
Aggregate notional amount of derivatives   1,500 1,500       1,300         $ 1,500 $ 1,300  
Foreign currency contracts | Designated as hedges                            
Significant Accounting Policies [Line Items]                            
Aggregate notional amount of derivatives   4,100 $ 4,100       $ 804         4,100 804  
Sikorsky Aircraft Corporation                            
Significant Accounting Policies [Line Items]                            
Acquisitions of businesses and investments in affiliates $ 9,003                          
Debt issuance cost   $ 48                        
Space Systems                            
Significant Accounting Policies [Line Items]                            
Net earnings from equity method investments                       $ 245 280 $ 300
Buildings | Minimum                            
Significant Accounting Policies [Line Items]                            
Property, plant and equipment, estimated life (years)                       10 years    
Buildings | Maximum                            
Significant Accounting Policies [Line Items]                            
Property, plant and equipment, estimated life (years)                       40 years    
Machinery and equipment | Minimum                            
Significant Accounting Policies [Line Items]                            
Property, plant and equipment, estimated life (years)                       5 years    
Machinery and equipment | Maximum                            
Significant Accounting Policies [Line Items]                            
Property, plant and equipment, estimated life (years)                       15 years    
Capitalized Software                            
Significant Accounting Policies [Line Items]                            
Capitalized internal-use software amortization                       $ 172 $ 206 $ 228
Capitalized Software | Minimum                            
Significant Accounting Policies [Line Items]                            
Property, plant and equipment, estimated life (years)                       2 years    
Capitalized Software | Maximum                            
Significant Accounting Policies [Line Items]                            
Property, plant and equipment, estimated life (years)                       6 years    
[1] The fourth quarter of 2015 incorporates the results of Sikorsky from the November 6, 2015 acquisition date through December 31, 2015, including approximately $400 million in net sales and about $45 million in operating loss, inclusive of intangible amortization and adjustments required to account for the acquisition.
[2] The fourth quarter of 2015 includes a charge for workforce reductions of approximately $67 million ($44 million after tax) and a tax benefit of about $71 million due to the retroactive reinstatement of the R&D tax credit in 2015.
[3] The fourth quarter of 2014 includes a charge of approximately $119 million ($107 million after tax) related to a non-cash goodwill impairment charge and a tax benefit of about $45 million due to the retroactive reinstatement of the R&D tax credit in 2014.
[4] The impairment in 2014 relates to our Technical Services reporting unit within our IS&GS business segment (Note 1).
[5] We recognized non-cash goodwill impairment charges related to the Technical Services reporting unit within our MFC business segment in 2014 and 2013. See Note 1 for more information.