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BUSINESS SEGMENTS - Disaggregation of Revenue (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
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | $ 9,263 | $ 3,208 | $ 17,814 | $ 18,194 | $ 12,856 | $ 6,801
United States |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 8,485 |  | 16,234 | 16,998 |  | 6,530
International |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 778 |  | 1,580 | 1,196 |  | 271
Integrated Mission Systems | Transferred over Time |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 2,758 |  | 5,839 | 5,538 |  | 52
Integrated Mission Systems | Transferred over Time | United States |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 2,120 |  | 4,115 | 4,338 |  | 30
Integrated Mission Systems | Transferred over Time | International |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 620 |  | 1,656 | 1,147 |  | 22
Integrated Mission Systems | Transferred over Time | Fixed-price |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 2,115 |  | 4,467 | 4,172 |  | 52
Integrated Mission Systems | Transferred over Time | Cost-reimbursable |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 625 |  | 1,304 | 1,313 |  | 0
Integrated Mission Systems | Transferred over Time | Prime contractor |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 1,893 |  | 4,044 | 3,721 |  | 27
Integrated Mission Systems | Transferred over Time | Subcontractor |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 847 |  | 1,727 | 1,764 |  | 25
Integrated Mission Systems | Intersegment | Transferred over Time |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 18 |  | 68 | 53 |  | 0
Space & Airborne Systems | Transferred over Time |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 2,377 |  | 5,093 | 4,946 |  | 3,711
Space & Airborne Systems | Transferred over Time | United States |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 2,038 |  | 4,417 | 4,180 |  | 3,252
Space & Airborne Systems | Transferred over Time | International |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 334 |  | 665 | 751 |  | 431
Space & Airborne Systems | Transferred over Time | Fixed-price |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 1,380 |  | 2,921 | 2,834 |  | 2,066
Space & Airborne Systems | Transferred over Time | Cost-reimbursable |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 992 |  | 2,161 | 2,097 |  | 1,617
Space & Airborne Systems | Transferred over Time | Prime contractor |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 1,349 |  | 2,925 | 2,684 |  | 2,244
Space & Airborne Systems | Transferred over Time | Subcontractor |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 1,023 |  | 2,157 | 2,247 |  | 1,439
Space & Airborne Systems | Intersegment | Transferred over Time |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 5 |  | 11 | 15 |  | 28
Communication Systems | Transferred at Point in Time |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 2,151 |  | 4,287 | 4,443 |  | 2,208
Communication Systems | Transferred at Point in Time | United States |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 1,507 |  | 3,001 | 3,181 |  | 1,280
Communication Systems | Transferred at Point in Time | International |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 628 |  | 1,232 | 1,225 |  | 927
Communication Systems | Transferred at Point in Time | Fixed-price |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 1,840 |  | 3,631 | 3,784 |  |
Communication Systems | Transferred at Point in Time | Cost-reimbursable |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 295 |  | 602 | 622 |  |
Communication Systems | Transferred at Point in Time | Prime contractor |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 1,406 |  | 2,886 | 3,102 |  |
Communication Systems | Transferred at Point in Time | Subcontractor |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 729 |  | 1,347 | 1,304 |  |
Communication Systems | Intersegment | Transferred at Point in Time |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 16 |  | 54 | 37 |  | 1
Aviation Systems | Transferred at Point in Time |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 2,038 |  | 2,783 | 3,448 |  | 672
Aviation Systems | Transferred at Point in Time | United States |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 1,472 |  | 2,329 | 2,769 |  | 640
Aviation Systems | Transferred at Point in Time | International |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 521 |  | 399 | 603 |  | 28
Aviation Systems | Transferred at Point in Time | Fixed-price |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 1,664 |  | 2,199 | 2,750 |  | 583
Aviation Systems | Transferred at Point in Time | Cost-reimbursable |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 329 |  | 529 | 622 |  | 85
Aviation Systems | Transferred at Point in Time | Prime contractor |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 1,245 |  | 1,808 | 2,258 |  | 654
Aviation Systems | Transferred at Point in Time | Subcontractor |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | 748 |  | 920 | 1,114 |  | 14
Aviation Systems | Intersegment | Transferred at Point in Time |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |
Revenue | $ 45 |  | $ 55 | $ 76 |  | $ 4

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