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SIGNIFICANT ACCOUNTING POLICIES - Average Warranty Period by Segment (Details) | 12 Months Ended
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Dec. 29, 2023
SAS | Minimum |
Warranty Period [Line Items] |
Average Warranty Period | 1 year
SAS | Maximum |
Warranty Period [Line Items] |
Average Warranty Period | 3 years
IMS | Minimum |
Warranty Period [Line Items] |
Average Warranty Period | 1 year
IMS | Maximum |
Warranty Period [Line Items] |
Average Warranty Period | 3 years
CS | Minimum |
Warranty Period [Line Items] |
Average Warranty Period | 1 year
CS | Maximum |
Warranty Period [Line Items] |
Average Warranty Period | 5 years
AR |
Warranty Period [Line Items] |
Average Warranty Period | 1 year

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: | us-gaap_StatementBusinessSegmentsAxis=hrs_SpaceAndAirborneSystemsSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
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: |

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

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

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