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SIGNIFICANT ACCOUNTING POLICIES - Average Warranty Period by Segment (Details) | 6 Months Ended
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Jan. 03, 2020
Integrated Mission Systems | Minimum |
Warranty Period [Line Items] |
Average Warranty Period | 1 year
Integrated Mission Systems | Maximum |
Warranty Period [Line Items] |
Average Warranty Period | 3 years
Space and Airborne Systems | Minimum |
Warranty Period [Line Items] |
Average Warranty Period | 1 year
Space and Airborne Systems | Maximum |
Warranty Period [Line Items] |
Average Warranty Period | 3 years
Communication Systems | Minimum |
Warranty Period [Line Items] |
Average Warranty Period | 1 year
Communication Systems | Maximum |
Warranty Period [Line Items] |
Average Warranty Period | 5 years
Aviation Systems | Minimum |
Warranty Period [Line Items] |
Average Warranty Period | 1 year
Aviation Systems | Maximum |
Warranty Period [Line Items] |
Average Warranty Period | 2 years

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- Definition Warranty obligations term. + References No definition available. + Details
Name: | hrs_WarrantyObligationsTerm
Namespace Prefix: | hrs_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Warranty Period Line Items. + References No definition available. + Details
Name: | hrs_WarrantyPeriodLineItems
Namespace Prefix: | hrs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=hrs_IntegratedMissionSystemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=hrs_SpaceandAirborneSystemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=hrs_CommunicationSystemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=hrs_AviationSystemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |