DISCONTINUED OPERATIONS AND DIVESTITURES - Textual (Details) - USD ($) $ / shares in Units, $ in Millions							3 Months Ended			9 Months Ended	12 Months Ended
	Apr. 28, 2017	Jan. 01, 2017	Apr. 08, 2016	Jan. 01, 2016	Feb. 04, 2013	Dec. 05, 2012	Jun. 30, 2017	Jan. 01, 2016	Sep. 27, 2013	Mar. 31, 2017	Jun. 30, 2017	Jul. 01, 2016	Jul. 03, 2015	Jun. 27, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of goodwill and other assets											$ 240	$ 367	$ 46
Adjustment to proceeds from sales of businesses, net											(25)	(11)	0
Gain (loss) on sale of discontinued operations, before tax											$ (11)	$ (21)	$ 0
Discontinued operations, per diluted share (in dollars per share)											$ (0.68)	$ (2.28)	$ 0.44
IT Services | Discontinued Operations, Disposed of by Sale | Critical Networks
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of disposal group	$ 646
Discontinued operation, period of continuing involvement after disposal	18 months
Goodwill assigned to disposal group										$ 487
Impairment of goodwill and other assets										240
Goodwill impairment loss										$ 228
Gain (loss) on sale of discontinued operations, before tax											$ (28)
Gain (loss) on disposal of discontinued operation, net of tax											$ 55
Discontinued operations, per diluted share (in dollars per share)											$ 0.44
Caprock | Discontinued Operations, Disposed of by Sale | Critical Networks
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of disposal group		$ 370
Discontinued operation, period of continuing involvement after disposal							12 months
Impairment of goodwill and other assets				$ 367
Goodwill impairment loss				$ 290
Gain (loss) on sale of discontinued operations, before tax							$ 14
Gain (loss) on disposal of discontinued operation, net of tax							$ 61
Discontinued operations, per diluted share (in dollars per share)							$ 0.49
Broadcast Communications | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash consideration received on sale of disposal group					$ 160
Gain (loss) on sale of discontinued operations, before tax								$ (21)
Gain (loss) on disposal of discontinued operation, net of tax								$ (17)
Discontinued operations, per diluted share (in dollars per share)								$ (0.14)
Asset sale agreement						$ 225
Asset sale agreement promissory note					15
Asset sale agreement earnout					$ 50
Cyber Integrated Solutions | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash consideration received on sale of disposal group														$ 28
Asset sale agreement									$ 35
Asset sale agreement promissory note									$ 7
Aerostructures | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Electronic Systems
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sale of discontinued operations, before tax												$ 10	$ 0
Asset sale agreement cash			$ 187
Capital lease obilgation assumed			$ 23