BUSINESS COMBINATIONS - Textual (Details) - USD ($) $ in Millions		12 Months Ended
	May 29, 2015	Jun. 30, 2017	Jul. 01, 2016	Jul. 03, 2015	Apr. 27, 2015
Business Acquisition [Line Items]
Cash paid for acquired businesses		$ 0	$ 0	$ 3,186
Long-term debt, gross		$ 3,945	$ 4,494
Fixed Rate Debt Securities
Business Acquisition [Line Items]
Notes payable					$ 2,400
Exelis
Business Acquisition [Line Items]
Percent of Exelis owned by Harris Corporation	100.00%
Total net purchase price paid	$ 4,709
Equity consideration transferred	1,527
Cash paid for acquired businesses	3,182
Exelis | Variable Rate Term Loan Agreement
Business Acquisition [Line Items]
Long-term debt, gross	1,300
Exelis | Fixed Rate Debt Securities
Business Acquisition [Line Items]
Notes payable	$ 2,400