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SIGNIFICANT ACCOUNTING POLICIES - Average Warranty Period by Segment (Details) | 12 Months Ended
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Jun. 29, 2018
Minimum | Communication Systems |
Warranty Period [Line Items] |
Average Warranty Period | 1 year
Minimum | Electronic Systems |
Warranty Period [Line Items] |
Average Warranty Period | 1 year
Minimum | Space and Intelligence Systems |
Warranty Period [Line Items] |
Average Warranty Period | 60 days
Maximum | Communication Systems |
Warranty Period [Line Items] |
Average Warranty Period | 5 years
Maximum | Electronic Systems |
Warranty Period [Line Items] |
Average Warranty Period | 2 years
Maximum | Space and Intelligence Systems |
Warranty Period [Line Items] |
Average Warranty Period | 2 years

X
- 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

X
- 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

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

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

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

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

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