RESEARCH AND DEVELOPMENT (Details) - USD ($) $ in Millions	12 Months Ended
Jun. 30, 2017	Jul. 01, 2016	Jul. 03, 2015
Research and Development [Abstract]
Company-sponsored research and development costs	$ 310	$ 305	$ 276

Research and development expense excluding acquired in process cost and including software.

No definition available.

Name:	hrs_ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCostAndIncludingSoftware
Namespace Prefix:	hrs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration