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BASIS OF PRESENTATION (Details) - AWE - USD ($)
$ in Millions
3 Months Ended 8 Months Ended 9 Months Ended 13 Months Ended
Sep. 24, 2017
Sep. 25, 2016
Aug. 23, 2016
Sep. 24, 2017
Sep. 25, 2016
Sep. 24, 2017
Aug. 24, 2016
Concentration Risk [Line Items]              
Ownership interest percentage owned immediately before acquisition             33.00%
Ownership interest percentage owned subsequent acquisition             51.00%
Gain (loss) associated with obtaining control of AWE         $ 104    
Deferred tax liabilities at corporate office              
Concentration Risk [Line Items]              
Gain (loss) associated with obtaining control of AWE   $ (23)     (23)    
Space Systems | Pre-tax gain recognized in operating results of Space System business segment              
Concentration Risk [Line Items]              
Gain (loss) associated with obtaining control of AWE   $ 127     $ 127    
Space Systems | Sales | Operating results              
Concentration Risk [Line Items]              
Concentration percentage 100.00%     100.00%   100.00%  
Space Systems | Sales | Equity in investment              
Concentration Risk [Line Items]              
Concentration percentage 0.00%            
Space Systems | Operating profit | Operating results              
Concentration Risk [Line Items]              
Concentration percentage 51.00%     51.00%   51.00%  
Space Systems | Earnings or losses | Equity in investment              
Concentration Risk [Line Items]              
Concentration percentage     33.00%