| **SIGNIFICANT ACCOUNTING POLICIES - Property, Plant and Equipment (Details)** | 12 Months Ended |
|-------------------------------------------------------------------------------|-----------------|
||
| **Property, Plant and Equipment [Line Items]**                                |            |
| Internal use software, useful life minimum                                    | 3 years         |
| Internal use software, useful life maximum                                    | 10 years        |
| Building | Minimum                                                            |            |
| **Property, Plant and Equipment [Line Items]**                                |            |
| Property, plant and equipment, useful life                                    | 2 years         |
| Building | Maximum                                                            |            |
| **Property, Plant and Equipment [Line Items]**                                |            |
| Property, plant and equipment, useful life                                    | 45 years        |
| Machinery and Equipment | Minimum                                             |            |
| **Property, Plant and Equipment [Line Items]**                                |            |
| Property, plant and equipment, useful life                                    | 2 years         |
| Machinery and Equipment | Maximum                                             |            |
| **Property, Plant and Equipment [Line Items]**                                |            |
| Property, plant and equipment, useful life                                    | 10 years        |

| X                                                                                                                                                                                                                                                                                                |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The maximum useful life of internal-use software, not intended for resale.
+ References
No definition available.
+ Details**Name:**hrs_InternalUseSoftwareUsefulLifeMaximum**Namespace Prefix:**hrs_**Data Type:**xbrli:durationItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The minimum useful life of internal-use software, not intended for resale.
+ References
No definition available.
+ Details**Name:**hrs_InternalUseSoftwareUsefulLifeMinimum**Namespace Prefix:**hrs_**Data Type:**xbrli:durationItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                          |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
+ References
No definition available.
+ Details**Name:**us-gaap_PropertyPlantAndEquipmentLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.
+ References
No definition available.
+ Details**Name:**us-gaap_PropertyPlantAndEquipmentUsefulLife**Namespace Prefix:**us-gaap_**Data Type:**xbrli:durationItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                          |
|------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember**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_PropertyPlantAndEquipmentByTypeAxis=us-gaap_MachineryAndEquipmentMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |