DISCONTINUED OPERATIONS AND DIVESTITURES - Income Statement (Details) - USD ($) $ in Millions		12 Months Ended
	Jan. 01, 2017	Jun. 28, 2019	Jun. 29, 2018	Jun. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued operations, net of income taxes		$ (4)	$ (3)	$ (85)
Discontinued Operations, Held-for-sale or Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue from product sales and services		0	0	1,039
Cost of product sales and services		0	0	(885)
Engineering, selling and administrative expenses		0	0	(91)
Impairment of goodwill and other assets		0	0	(240)
Non-operating loss, net		(5)	(8)	(7)
Loss before income taxes		(5)	(8)	(184)
Loss on sale of discontinued operations, net		0	0	(11)
Income tax (expense) benefit		1	5	110
Discontinued operations, net of income taxes		(4)	(3)	(85)
Discontinued Operations, Held-for-sale or Disposed of by Sale | IT Services
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue from product sales and services		0	0	895
Cost of product sales and services		0	0	(777)
Engineering, selling and administrative expenses		0	0	(68)
Impairment of goodwill and other assets		0	0	(240)
Non-operating loss, net		(1)	(4)	(9)
Loss before income taxes		(1)	(4)	(199)
Loss on sale of discontinued operations, net		0	0	(28)
Income tax (expense) benefit		0	5	69
Discontinued operations, net of income taxes		(1)	1	(158)
Discontinued Operations, Held-for-sale or Disposed of by Sale | Caprock
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue from product sales and services		0	0	144
Cost of product sales and services		0	0	(108)
Engineering, selling and administrative expenses		0	0	(23)
Non-operating loss, net		(3)	(4)	4
Loss before income taxes		(3)	(4)	17
Loss on sale of discontinued operations, net		0	0	14
Income tax (expense) benefit		1	0	41
Discontinued operations, net of income taxes		$ (2)	$ (4)	72
Discontinued Operations, Disposed of by Sale | Broadcast Communications
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Non-operating loss, net				(2)
Adjustment to gain (loss) on discontinued operations				$ 3
Discontinued Operations, Disposed of by Sale | Caprock
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on sale of discontinued operations, net	$ 14