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Business Segment Information - Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 28, 2018 | Dec. 29, 2017 | Dec. 28, 2018 | Dec. 29, 2017
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 1,666 | $ 1,535 | $ 3,208 | $ 2,945
Communication Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 540 | 492 | 1,009 | 898
Communication Systems | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 299 | 276 | 558 | 484
Communication Systems | International |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 241 | 216 | 451 | 414
Electronic Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 617 | 582 | 1,206 | 1,123
Electronic Systems | Fixed-price |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 508 | 463 | 986 | 885
Electronic Systems | Cost-reimbursable |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 109 | 119 | 220 | 238
Electronic Systems | Prime contractor |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 399 | 410 | 793 | 808
Electronic Systems | Subcontractor |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 218 | 172 | 413 | 315
Electronic Systems | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 486 | 464 | 964 | 890
Electronic Systems | International |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 131 | 118 | 242 | 233
Space and Intelligence Systems |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 513 | 462 | 1,001 | 928
Space and Intelligence Systems | Fixed-price |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 188 | 120 | 360 | 243
Space and Intelligence Systems | Cost-reimbursable |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 325 | 342 | 641 | 685
Space and Intelligence Systems | Prime contractor |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 362 | 329 | 714 | 663
Space and Intelligence Systems | Subcontractor |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 151 | 133 | 287 | 265
Space and Intelligence Systems | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 500 | 446 | 976 | 898
Space and Intelligence Systems | International |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 13 | $ 16 | $ 25 | $ 30

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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