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BUSINESS SEGMENTS - Geographic Information (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 03, 2020 | Dec. 28, 2018 | Dec. 31, 2021 | Jan. 01, 2021 | Jan. 03, 2020 | Jun. 28, 2019
Segment Reporting Information [Line Items] |  |  |  |  |  |
Capital Expenditures | $ 173 |  | $ 342 | $ 368 |  | $ 161
Depreciation and Amortization | 442 |  | 967 | 1,032 |  | 258
Revenue | 9,263 | $ 3,208 | 17,814 | 18,194 | $ 12,856 | 6,801
U.S. operations |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue | 8,485 |  | 16,234 | 16,998 |  | 6,530
Long-lived assets | 1,865 |  | 1,870 | 1,949 | 1,865 | 866
International operations |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue | 778 |  | 1,580 | 1,196 |  | 271
Long-lived assets | 252 |  | 231 | 153 | $ 252 | 28
Operating segments | Integrated Mission Systems |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Capital Expenditures | 29 |  | 64 | 67 |  | 1
Depreciation and Amortization | 37 |  | 74 | 70 |  | 2
Revenue | 2,758 |  | 5,839 | 5,538 |  | 52
Operating segments | Space & Airborne Systems |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Capital Expenditures | 36 |  | 101 | 92 |  | 48
Depreciation and Amortization | 31 |  | 69 | 66 |  | 50
Revenue | 2,377 |  | 5,093 | 4,946 |  | 3,711
Operating segments | Communication Systems |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Capital Expenditures | 22 |  | 56 | 58 |  | 29
Depreciation and Amortization | 32 |  | 49 | 61 |  | 49
Revenue | 2,151 |  | 4,287 | 4,443 |  | 2,208
Operating segments | Aviation Systems |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Capital Expenditures | 64 |  | 63 | 87 |  | 54
Depreciation and Amortization | 53 |  | 66 | 103 |  | 29
Revenue | 2,038 |  | 2,783 | 3,448 |  | 672
Operating segments | Other non-reportable business segments |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Capital Expenditures | 0 |  | 0 | 0 |  | 6
Depreciation and Amortization | 0 |  | 0 | 0 |  | 3
Corporate eliminations |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Capital Expenditures | 22 |  | 58 | 64 |  | 23
Depreciation and Amortization | 289 |  | 709 | 732 |  | 125
Revenue | $ (84) |  | $ (188) | $ (181) |  | $ (7)

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