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DISCONTINUED OPERATIONS - Additional Information (Details) - USD ($) |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Apr. 28, 2017 | Jan. 01, 2017 | Feb. 04, 2013 | Mar. 31, 2017 | Jun. 29, 2018 | Jun. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Discontinued operations, per diluted share (in dollars per share) |  |  |  |  | $ (0.02) | $ (0.68)
Discontinued Operations, Disposed of by Sale | IT Services | Critical Networks |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Proceeds from sale of discontinued operations, subject to post-closing adjustments, net | $ 646,000,000 |  |  |  |  |
Gain (loss) on sale of discontinued operations, before tax | (28,000,000) |  |  |  |  |
Gain (loss) on disposal of discontinued operation, net of tax | $ 55,000,000 |  |  |  |  |
Discontinued operations, per diluted share (in dollars per share) | $ 0.44 |  |  |  |  |
Discontinued operation, period of continuing involvement after disposal | 18 months |  |  |  |  |
Goodwill assigned to disposal group |  |  |  | $ 487,000,000 |  |
Non-cash impairment asset charge in discontinued operations |  |  |  | 240,000,000 |  |
Goodwill impairment loss |  |  |  | $ 228,000,000 |  |
Discontinued Operations, Disposed of by Sale | Caprock |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Proceeds from sale of discontinued operations, subject to post-closing adjustments, net |  | $ 368,000,000 |  |  |  |
Gain (loss) on sale of discontinued operations, before tax |  | 14,000,000 |  |  |  |
Gain (loss) on disposal of discontinued operation, net of tax |  | $ 61,000,000 |  |  |  |
Discontinued operations, per diluted share (in dollars per share) |  | $ 0.49 |  |  |  |
Discontinued Operations, Disposed of by Sale | Broadcast Communications |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |
Asset sale agreement |  |  | $ 225,000,000 |  |  |
Cash consideration received on sale of disposal group |  |  | 160,000,000 |  |  |
Asset sale agreement promissory note |  |  | 15,000,000 |  |  |
Asset sale agreement earnout |  |  | $ 50,000,000 |  |  |

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