BUSINESS COMBINATIONS - Consideration Paid for Exelis (Details) - USD ($) $ in Millions		12 Months Ended
	May 29, 2015	Jun. 30, 2017	Jul. 01, 2016	Jul. 03, 2015
Business Acquisition [Line Items]
Net cash consideration paid		$ 0	$ 0	$ 3,186
Exelis
Business Acquisition [Line Items]
Cash consideration paid for Exelis outstanding common stock	$ 3,128
Cash consideration paid for Exelis outstanding stock options	125
Cash consideration paid for Exelis outstanding restricted stock units	38
Cash consideration paid for dividends to Exelis shareholders	21
Total cash consideration paid	3,312
Less cash acquired	(130)
Net cash consideration paid	3,182
Fair value of Harris common stock issued for Exelis common stock	1,527
Total net purchase price paid	$ 4,709