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BUSINESS SEGMENTS - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 29, 2023 | Dec. 30, 2022 | Dec. 31, 2021
Segment Reporting Information [Line Items] |  |  |
Restructuring and related activities, term | 3 years |  |
Revenue | $ 19,419 | $ 17,062 | $ 17,814
Amortization of intangible assets, debt premium, debt discount and debt issuance costs | 777 | 596 | 624
LHX NeXt program |  |  |
Segment Reporting Information [Line Items] |  |  |
Restructuring charges | 25 |  |
Restructuring liabilities | 4 |  |
International |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | 1,882 | 1,689 | 1,580
AR | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | 37 |  |
SAS | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | 874 | 712 | 704
IMS | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | 1,727 | 1,759 | 1,879
CS | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | $ 1,535 | $ 1,437 | $ 1,232
Revenue from Contract with Customer Benchmark | Government Contracts Concentration Risk | U.S. Government |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk percentage | 76.00% | 74.00% | 75.00%
Revenue from Contract with Customer, Segment Benchmark | Product Concentration Risk | AR |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk percentage | 29.00% |  |
Revenue from Contract with Customer, Segment Benchmark | Product Concentration Risk | SAS |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk percentage | 28.00% |  |
Revenue from Contract with Customer, Segment Benchmark | Product Concentration Risk | IMS |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk percentage | 38.00% |  |
Revenue from Contract with Customer, Segment Benchmark | Product Concentration Risk | CS |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk percentage | 19.00% |  |
Revenue from Contract with Customer, Product and Service Benchmark | Geographic Concentration Risk | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk percentage | 21.00% | 23.00% | 22.00%
Revenue | $ 4,200 | $ 3,900 | $ 3,900

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