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Business Segment Information - Revenues and Income From Continuing Operations by Segment (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Sep. 28, 2018 | Sep. 29, 2017
Segment Reporting Information [Line Items] |  |
Revenue | $ 1,542 | $ 1,410
Income From Continuing Operations Before Income Taxes |  |
Non-operating income | 47 | 46
Net interest expense | (43) | (41)
Income from continuing operations before income taxes | 257 | 228
Communication Systems |  |
Segment Reporting Information [Line Items] |  |
Revenue | 469 | 406
Electronic Systems |  |
Segment Reporting Information [Line Items] |  |
Revenue | 589 | 541
Space and Intelligence Systems |  |
Segment Reporting Information [Line Items] |  |
Revenue | 488 | 466
Operating Segments | Communication Systems |  |
Segment Reporting Information [Line Items] |  |
Revenue | 469 | 406
Income From Continuing Operations Before Income Taxes |  |
Segment operating income | 140 | 115
Operating Segments | Electronic Systems |  |
Segment Reporting Information [Line Items] |  |
Revenue | 589 | 541
Income From Continuing Operations Before Income Taxes |  |
Segment operating income | 115 | 109
Operating Segments | Space and Intelligence Systems |  |
Segment Reporting Information [Line Items] |  |
Revenue | 488 | 466
Income From Continuing Operations Before Income Taxes |  |
Segment operating income | 86 | 87
Corporate eliminations |  |
Segment Reporting Information [Line Items] |  |
Revenue | (4) | (3)
Unallocated corporate expense and corporate eliminations |  |
Income From Continuing Operations Before Income Taxes |  |
Segment operating income | (41) | (42)
Pension adjustment | (47) | (46)
Unallocated corporate expense and corporate eliminations | Exelis |  |
Income From Continuing Operations Before Income Taxes |  |
Amortization of intangible assets | $ 25 | $ 25

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