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BUSINESS DIVESTITURES AND ASSET SALES - Business Divestiture-Related Gain (Loss) (Details) - USD ($) |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jun. 29, 2019 | Apr. 02, 2021 | Jul. 03, 2020 | Jan. 03, 2020 | Dec. 31, 2021 | Jan. 01, 2021 | Jun. 28, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Total Business divestiture-related gains (losses) |  |  |  |  |  |  | $ 0
Goodwill impairment | $ 0 |  |  |  | $ 62,000,000 | $ 480,000,000 |
Held-for-sale or Disposed of by Sale |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Total Business divestiture-related gains (losses) |  |  |  |  | 220,000,000 | (51,000,000) |
Held-for-sale or Disposed of by Sale | Narda-MITEQ business |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Total Business divestiture-related gains (losses) |  |  |  |  | (9,000,000) | 0 |
Held-for-sale or Disposed of by Sale | ESSCO business |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Total Business divestiture-related gains (losses) |  |  |  |  | 31,000,000 | 0 |
Held-for-sale or Disposed of by Sale | Electron Devices business |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Total Business divestiture-related gains (losses) |  |  |  |  | 31,000,000 | 0 |
Held-for-sale or Disposed of by Sale | VSE disposal group |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Total Business divestiture-related gains (losses) |  |  |  |  | (29,000,000) | (18,000,000) |
Held-for-sale or Disposed of by Sale | CPS business |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Total Business divestiture-related gains (losses) |  |  |  |  | (19,000,000) | 0 |
Held-for-sale or Disposed of by Sale | Military training business |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Total Business divestiture-related gains (losses) |  |  |  |  | 217,000,000 | 0 |
Held-for-sale or Disposed of by Sale | EOTech |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Total Business divestiture-related gains (losses) |  |  |  |  | 0 | 2,000,000 |
Held-for-sale or Disposed of by Sale | Airport security and automation business |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Total Business divestiture-related gains (losses) |  |  |  |  | 0 | (23,000,000) |
Held-for-sale or Disposed of by Sale | Other |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Total Business divestiture-related gains (losses) |  |  |  |  | (2,000,000) | (12,000,000) |
Held-for-sale or Disposed of by Sale | Harris Night Vision |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Total Business divestiture-related gains (losses) |  |  |  | $ 229,000,000 |  |  |
Disposal Group, Held-for-sale, Not Discontinued Operations | VSE disposal group |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Goodwill impairment |  |  | $ 14,000,000 |  |  |  |
Disposal Group, Held-for-sale, Not Discontinued Operations | CPS business |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Goodwill impairment |  | $ 62,000,000 |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | VSE disposal group |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Goodwill impairment |  |  |  |  |  | 14,000,000 |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | CPS business |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Goodwill impairment |  |  |  |  | $ 62,000,000 |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Harris Night Vision |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Non-cash working capital adjustment to gain on sale of business |  |  |  |  |  | $ 12,000,000 |

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