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Business Segment Information - Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 29, 2019 | Mar. 30, 2018 | Mar. 29, 2019 | Mar. 30, 2018
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 1,728 | $ 1,562 | $ 4,936 | $ 4,507
Communication Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 568 | 479 | 1,577 | 1,377
Communication Systems | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 324 | 232 | 882 | 716
Communication Systems | International |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 244 | 247 | 695 | 661
Electronic Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 649 | 606 | 1,855 | 1,729
Electronic Systems | Fixed-price |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 515 | 491 | 1,501 | 1,376
Electronic Systems | Cost-reimbursable |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 134 | 115 | 354 | 353
Electronic Systems | Prime contractor |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 402 | 426 | 1,195 | 1,234
Electronic Systems | Subcontractor |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 247 | 180 | 660 | 495
Electronic Systems | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 539 | 491 | 1,503 | 1,381
Electronic Systems | International |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 110 | 115 | 352 | 348
Space and Intelligence Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 514 | 482 | 1,515 | 1,410
Space and Intelligence Systems | Fixed-price |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 173 | 140 | 533 | 383
Space and Intelligence Systems | Cost-reimbursable |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 341 | 342 | 982 | 1,027
Space and Intelligence Systems | Prime contractor |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 355 | 353 | 1,069 | 1,016
Space and Intelligence Systems | Subcontractor |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 159 | 129 | 446 | 394
Space and Intelligence Systems | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 504 | 466 | 1,480 | 1,364
Space and Intelligence Systems | International |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 10 | $ 16 | $ 35 | $ 46

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