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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% |  |  |  |

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