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Business Segment Information - Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended
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Sep. 28, 2018 | Sep. 29, 2017
Disaggregation of Revenue [Line Items] |  |
Revenue | $ 1,542 | $ 1,410
Communication Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 469 | 406
Communication Systems | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 259 | 208
Communication Systems | International |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 210 | 198
Electronic Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 589 | 541
Electronic Systems | Fixed-price |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 478 | 422
Electronic Systems | Cost-reimbursable |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 111 | 119
Electronic Systems | Prime contractor |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 394 | 398
Electronic Systems | Subcontractor |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 195 | 143
Electronic Systems | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 478 | 426
Electronic Systems | International |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 111 | 115
Space and Intelligence Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 488 | 466
Space and Intelligence Systems | Fixed-price |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 172 | 123
Space and Intelligence Systems | Cost-reimbursable |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 316 | 343
Space and Intelligence Systems | Prime contractor |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 352 | 334
Space and Intelligence Systems | Subcontractor |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 136 | 132
Space and Intelligence Systems | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 476 | 452
Space and Intelligence Systems | International |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | $ 12 | $ 14

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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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