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SUBSEQUENT EVENTS - Pending Divestitures (Details) $ in Millions | 2 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 01, 2021 USD ($) business | Jan. 03, 2020 USD ($) | Dec. 28, 2018 USD ($) | Jan. 01, 2021 USD ($) | Jan. 03, 2020 USD ($) | Jun. 28, 2019 USD ($) | Jun. 29, 2018 USD ($) | Feb. 27, 2021 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Revenue |  | $ 9,263 | $ 3,208 | $ 18,194 | $ 12,856 | $ 6,801 | $ 6,168 |
Disposal Group, Not Discontinued Operations | Military Training Business | Aviation Systems |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Revenue |  |  |  | 500 |  |  |  |
Disposal Group, Not Discontinued Operations | CPS | Aviation Systems |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Revenue |  |  |  | $ 230 |  |  |  |
Subsequent Event | Disposal Group, Not Discontinued Operations |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Number of business divested | business | 2 |  |  |  |  |  |  |
Subsequent Event | Disposal Group, Not Discontinued Operations | Military Training Business | Aviation Systems |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Cash price on sale of business |  |  |  |  |  |  |  | $ 1,050
Subsequent Event | Disposal Group, Not Discontinued Operations | CPS | Aviation Systems |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Cash price on sale of business | $ 400 |  |  |  |  |  |  |

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