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Business Segment Information - Total Assets by Segment (Details) - USD ($) $ in Millions | Jul. 03, 2020 | Jan. 03, 2020
--- | --- | ---
Segment Reporting Information [Line Items] |  |
Assets | $ 37,852 | $ 38,336
Identifiable intangibles assets acquired | 8,336 | 8,458
Corporate |  |
Segment Reporting Information [Line Items] |  |
Assets | 11,290 | 10,112
Corporate | Exelis |  |
Segment Reporting Information [Line Items] |  |
Identifiable intangibles assets acquired | 8,300 | 8,500
Integrated Mission Systems |  |
Segment Reporting Information [Line Items] |  |
Assets | 8,675 | 7,896
Space and Airborne Systems |  |
Segment Reporting Information [Line Items] |  |
Assets | 6,899 | 6,829
Communication Systems |  |
Segment Reporting Information [Line Items] |  |
Assets | 5,719 | 5,930
Aviation Systems |  |
Segment Reporting Information [Line Items] |  |
Assets | $ 5,269 | $ 7,569

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