XML 54 R37.htm IDEA: XBRL DOCUMENT
v3.24.4

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
--- | ---
Oct. 31, 2024
Accounting Policies [Abstract] |
Property, Plant and Equipment [Table Text Block] | The Company’s property, plant and equipment is generally depreciated over the following estimated useful lives:
| Buildings and improvements | 10 | to | 40 | years |
| Machinery and equipment | 3 | to | 10 | years |
| Leasehold improvements | 2 | to | 20 | years |
| Tooling | 2 | to | 5 | years |
Intangible Assets Useful Life [Table Text Block] | The Company’s intangible assets subject to amortization are amortized on the straight-line method (except for customer relationships, which are amortized on an accelerated method) over the following estimated useful lives:
| Customer relationships | 3 | to | 17 | years |
| Intellectual property | 3 | to | 22 | years |
| Other | 5 | to | 19 | years |
Defined Benefit Plans Disclosures [Table Text Block] | The following table presents the fair value of the Plan's assets and projected benefit obligation as of October 31, for each of the last two fiscal years (in thousands):
| As of October 31,
| 2024 |  | 2023
Fair value of plan assets | $11,165 |  |  | $10,025 |
Projected benefit obligation | 9,875 |  |  | 9,592 |
Funded status | $1,290 |  |  | $433 |

X
- Definition Intangible Assets Useful Lives [Table Text Block] + References No definition available. + Details
Name: | hei_IntangibleAssetsUsefulLifeTableTextBlock
Namespace Prefix: | hei_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Property, Plant and Equipment Useful Lives [Table Text Block] + References No definition available. + Details
Name: | hei_PropertyPlantAndEquipmentUsefulLifeTableTextBlock
Namespace Prefix: | hei_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 20 -Topic 715 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-3 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-4 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-2 + Details
Name: | us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration