BUSINESS SEGMENTS - Additional Information (Details) $ in Millions	12 Months Ended
	Jun. 28, 2019 USD ($) segment	Jun. 29, 2018 USD ($)	Jun. 30, 2017 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	3
Number of business segments | segment	3
Amortization of intangible assets, debt premium, debt discount and debt issuance costs | $	$ 120	$ 116	$ 125
Geographic Concentration Risk | Total Revenue
Segment Reporting Information [Line Items]
Concentration risk percentage	5.00%	5.00%	5.00%
Government Contracts Concentration Risk | Total Revenue
Segment Reporting Information [Line Items]
Concentration risk percentage	77.00%	75.00%	74.00%
Product Concentration Risk | Total Revenue
Segment Reporting Information [Line Items]
Concentration risk percentage	22.00%	23.00%	25.00%
Export revenue | $	$ 1,500	$ 1,400	$ 1,500
Product Concentration Risk | Sales Revenue Service | Communication Systems
Segment Reporting Information [Line Items]
Concentration risk percentage	8.00%
Product Concentration Risk | Sales Revenue Service | Electronic Systems
Segment Reporting Information [Line Items]
Concentration risk percentage	28.00%
Product Concentration Risk | Sales Revenue Service | Space and Intelligence Systems
Segment Reporting Information [Line Items]
Concentration risk percentage	13.00%