ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jul. 01, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation, net of income taxes of $1 million and $29 million at June 30, 2017 and July 1, 2016, respectively	$ (113)	$ (131)
Net unrealized loss on hedging derivatives, net of income taxes of $11 million at June 30, 2017 and July 1, 2016	(17)	(18)
Unrecognized postretirement obligations, net of income taxes of $89 million and $213 million at June 30, 2017 and July 1, 2016, respectively	(146)	(346)
Accumulated other comprehensive loss	(276)	(495)
Foreign currency translation, tax	1	29
Net unrealized loss on hedging derivatives, tax	11	11
Unrecognized postretirement obligations, tax	89	$ 213
Caprock | Discontinued Operations, Disposed of by Sale | Critical Networks | Accumulated Foreign Currency Adjustment Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation, tax	(14)
Reclassification from accumulated other comprehensive loss	$ 52