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INFORMATION ON BUSINESS SEGMENTS - Total Assets For Each Business Segment (Details) - USD ($) $ in Millions | Sep. 29, 2019 | Dec. 31, 2018
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Segment Reporting Information [Line Items] |  |
Total assets | $ 49,275 | $ 44,876
Business segments |  |
Segment Reporting Information [Line Items] |  |
Total assets | 40,381 | 37,230
Business segments | Aeronautics |  |
Segment Reporting Information [Line Items] |  |
Total assets | 10,441 | 8,435
Business segments | Missiles and Fire Control |  |
Segment Reporting Information [Line Items] |  |
Total assets | 5,276 | 5,017
Business segments | Rotary and Mission Systems |  |
Segment Reporting Information [Line Items] |  |
Total assets | 18,843 | 18,333
Business segments | Space |  |
Segment Reporting Information [Line Items] |  |
Total assets | 5,821 | 5,445
Corporate |  |
Segment Reporting Information [Line Items] |  |
Total assets | $ 8,894 | $ 7,646

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