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RESEARCH AND DEVELOPMENT (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jun. 28, 2019 | Jun. 29, 2018 | Jun. 30, 2017
Research and Development [Abstract] |  |  |
Company-sponsored research and development costs | $ 331 | $ 311 | $ 310

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- Definition Research and development expense excluding acquired in process cost and including software. + References No definition available. + Details
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Namespace Prefix: | hrs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_ResearchAndDevelopmentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration