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Business Segment Information - Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Apr. 02, 2021 | Apr. 03, 2020
Disaggregation of Revenue [Line Items] |  |
Revenue | $ 4,567 | $ 4,626
Integrated Mission Systems | Transferred over time |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,451 | 1,370
Integrated Mission Systems | Transferred over time | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,033 | 1,105
Integrated Mission Systems | Transferred over time | International |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 418 | 265
Integrated Mission Systems | Transferred over time | Fixed-price |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,093 | 1,025
Integrated Mission Systems | Transferred over time | Cost-reimbursable |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 358 | 345
Integrated Mission Systems | Transferred over time | Prime contractor |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,006 | 949
Integrated Mission Systems | Transferred over time | Subcontractor |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 445 | 421
Space and Airborne Systems | Transferred over time |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,236 | 1,192
Space and Airborne Systems | Transferred over time | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,062 | 1,003
Space and Airborne Systems | Transferred over time | International |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 174 | 189
Space and Airborne Systems | Transferred over time | Fixed-price |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 716 | 670
Space and Airborne Systems | Transferred over time | Cost-reimbursable |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 520 | 522
Space and Airborne Systems | Transferred over time | Prime contractor |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 683 | 658
Space and Airborne Systems | Transferred over time | Subcontractor |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 553 | 534
Communication Systems | Transferred at point in time and over time |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,112 | 1,094
Communication Systems | Transferred at point in time and over time | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 841 | 834
Communication Systems | Transferred at point in time and over time | International |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 271 | 260
Communication Systems | Transferred at point in time and over time | Fixed-price |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 946 | 918
Communication Systems | Transferred at point in time and over time | Cost-reimbursable |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 166 | 176
Communication Systems | Transferred at point in time and over time | Prime contractor |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 729 | 740
Communication Systems | Transferred at point in time and over time | Subcontractor |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 383 | 354
Aviation Systems | Transferred at point in time and over time |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 814 | 1,011
Aviation Systems | Transferred at point in time and over time | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 699 | 749
Aviation Systems | Transferred at point in time and over time | International |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 115 | 262
Aviation Systems | Transferred at point in time and over time | Fixed-price |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 652 | 841
Aviation Systems | Transferred at point in time and over time | Cost-reimbursable |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 162 | 170
Aviation Systems | Transferred at point in time and over time | Prime contractor |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 536 | 664
Aviation Systems | Transferred at point in time and over time | Subcontractor |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | $ 278 | $ 347

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