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GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Sep. 29, 2023 USD ($) | Mar. 31, 2023 unit | Sep. 30, 2022 USD ($) | Sep. 29, 2023 USD ($) unit | Sep. 30, 2022 USD ($) | Dec. 30, 2022 USD ($) | Jul. 28, 2023 USD ($) | Jan. 03, 2023 USD ($)
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Number of reporting units | unit |  | 9 |  | 8 |  |  |  |
Reallocation of goodwill in business realignment |  |  |  | $ 0 |  |  |  |
Goodwill | $ 20,736 |  |  | 20,736 |  | $ 17,283 |  |
Amortization of acquisition-related intangibles | 208 |  | $ 151 | 546 | $ 454 |  |  |
ADG Reporting Unit |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Reallocation of goodwill in business realignment |  |  | (367) |  | (367) |  |  |
Impairment of goodwill |  |  |  |  |  | 313 |  |
Broadband Communications Reporting Unit |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Impairment of goodwill |  |  |  |  |  | 355 |  |
Electro Optical Reporting Unit |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Reallocation of goodwill in business realignment |  |  | $ (80) |  | $ (80) |  |  |
Impairment of goodwill |  |  |  |  |  | 134 |  |
Tactical Data Links (TDL) Product Line |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  | $ 1,117
Aerojet Rocketdyne Holdings, Inc. |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  | $ 2,348 |
SAS |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Reallocation of goodwill in business realignment |  |  |  | 327 |  |  |  |
Goodwill | 6,091 |  |  | 6,091 |  | 5,778 |  |
CS |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Reallocation of goodwill in business realignment |  |  |  | 0 |  |  |  |
Goodwill | 4,913 |  |  | 4,913 |  | $ 3,796 |  |
CS | Tactical Data Links (TDL) Product Line |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Goodwill | 1,117 |  |  | 1,117 |  |  |  |
Discontinued Operations, Disposed of by Means Other than Sale, Abandonment | Open Water Power Facility | In-process research and development |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |
Impairment of intangible assets | $ 21 |  |  | $ 21 |  |  |  |

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