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BUSINESS SEGMENTS - Disaggregation of Revenue (Details) - USD ($) $ in Millions | 12 Months Ended
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Jun. 29, 2018 | Jun. 30, 2017
Disaggregation of Revenue [Line Items] |  |
Revenue | $ 6,168 | $ 5,897
Communication Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,904 | 1,754
Communication Systems | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 983 | 811
Communication Systems | International |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 921 | 943
Electronic Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 2,365 | 2,245
Electronic Systems | Fixed-price |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,900 | 1,833
Electronic Systems | Cost-reimbursable |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 465 | 412
Electronic Systems | Prime contractor |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,670 | 1,653
Electronic Systems | Subcontractor |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 695 | 592
Electronic Systems | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,890 | 1,769
Electronic Systems | International |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 475 | 476
Space and Intelligence Systems |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,913 | 1,904
Space and Intelligence Systems | Fixed-price |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 544 | 448
Space and Intelligence Systems | Cost-reimbursable |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,369 | 1,456
Space and Intelligence Systems | Prime contractor |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,384 | 1,369
Space and Intelligence Systems | Subcontractor |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 529 | 535
Space and Intelligence Systems | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,861 | 1,821
Space and Intelligence Systems | International |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | $ 52 | $ 83

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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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