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Business Segment Information - Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 01, 2021 | Oct. 02, 2020 | Oct. 01, 2021 | Oct. 02, 2020
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 4,229 | $ 4,463 | $ 13,464 | $ 13,534
Intersegment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | (46) | (44) | (141) | (132)
Integrated Mission Systems | Transferred over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 1,336 | 1,372 | 4,281 | 4,073
Integrated Mission Systems | Transferred over time | Intersegment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 16 | 12 | 45 | 37
Integrated Mission Systems | Transferred over time | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 1,016 | 1,086 | 3,070 | 3,205
Integrated Mission Systems | Transferred over time | International |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 304 | 274 | 1,166 | 831
Integrated Mission Systems | Transferred over time | Fixed-price |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 988 | 1,039 | 3,227 | 3,060
Integrated Mission Systems | Transferred over time | Cost-reimbursable |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 332 | 321 | 1,009 | 976
Integrated Mission Systems | Transferred over time | Prime contractor |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 906 | 908 | 2,933 | 2,715
Integrated Mission Systems | Transferred over time | Subcontractor |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 414 | 452 | 1,303 | 1,321
Space and Airborne Systems | Transferred over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 1,284 | 1,249 | 3,807 | 3,690
Space and Airborne Systems | Transferred over time | Intersegment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 4 | 5 | 8 | 11
Space and Airborne Systems | Transferred over time | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 1,122 | 1,064 | 3,284 | 3,114
Space and Airborne Systems | Transferred over time | International |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 158 | 180 | 515 | 565
Space and Airborne Systems | Transferred over time | Fixed-price |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 717 | 702 | 2,172 | 2,072
Space and Airborne Systems | Transferred over time | Cost-reimbursable |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 563 | 542 | 1,627 | 1,607
Space and Airborne Systems | Transferred over time | Prime contractor |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 753 | 674 | 2,169 | 2,006
Space and Airborne Systems | Transferred over time | Subcontractor |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 527 | 570 | 1,630 | 1,673
Communication Systems | Transferred at point in time and over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 1,030 | 1,094 | 3,269 | 3,300
Communication Systems | Transferred at point in time and over time | Intersegment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 15 | 9 | 40 | 27
Communication Systems | Transferred at point in time and over time | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 719 | 745 | 2,337 | 2,410
Communication Systems | Transferred at point in time and over time | International |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 296 | 340 | 892 | 863
Communication Systems | Transferred at point in time and over time | Fixed-price |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 871 | 931 | 2,765 | 2,790
Communication Systems | Transferred at point in time and over time | Cost-reimbursable |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 144 | 154 | 464 | 483
Communication Systems | Transferred at point in time and over time | Prime contractor |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 681 | 760 | 2,193 | 2,249
Communication Systems | Transferred at point in time and over time | Subcontractor |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 334 | 325 | 1,036 | 1,024
Aviation Systems | Transferred at point in time and over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 625 | 792 | 2,248 | 2,603
Aviation Systems | Transferred at point in time and over time | Intersegment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 11 | 18 | 48 | 57
Aviation Systems | Transferred at point in time and over time | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 530 | 669 | 1,891 | 2,076
Aviation Systems | Transferred at point in time and over time | International |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 84 | 105 | 309 | 470
Aviation Systems | Transferred at point in time and over time | Fixed-price |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 506 | 630 | 1,786 | 2,069
Aviation Systems | Transferred at point in time and over time | Cost-reimbursable |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 108 | 144 | 414 | 477
Aviation Systems | Transferred at point in time and over time | Prime contractor |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 383 | 511 | 1,439 | 1,688
Aviation Systems | Transferred at point in time and over time | Subcontractor |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 231 | $ 263 | $ 761 | $ 858

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