INFORMATION ON BUSINESS SEGMENTS - Total Assets For Each Business Segment (Details) - USD ($) $ in Millions	Jun. 28, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total assets	$ 49,603	$ 47,528
Business segments
Segment Reporting Information [Line Items]
Total assets	39,777	38,734
Business segments | Aeronautics
Segment Reporting Information [Line Items]
Total assets	9,801	9,109
Business segments | Missiles and Fire Control
Segment Reporting Information [Line Items]
Total assets	5,257	5,030
Business segments | Rotary and Mission Systems
Segment Reporting Information [Line Items]
Total assets	18,498	18,751
Business segments | Space
Segment Reporting Information [Line Items]
Total assets	6,221	5,844
Corporate
Segment Reporting Information [Line Items]
Total assets	$ 9,826	$ 8,794