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SELECTED FINANCIAL STATEMENT INFORMATION (Details Textuals) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jul. 31, 2013 | Jul. 31, 2012 | Jul. 31, 2013 | Jul. 31, 2012 | Oct. 31, 2012
Accrued customer rebates and credits | $ 14.5 |  | $ 14.5 |  | $ 10.8
Total customer rebates and credits deducted within net sales | $ 2.5 | $ 1.0 | $ 6.0 | $ 2.1 |

X
- Definition Carrying value as of the balance sheet date of accrued customer rebates and credits. + References No definition available. + Details
Name: | hei_AccruedCustomerRebatesAndCredits
Namespace Prefix: | hei_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The total customer rebates and credits expense deducted within net sales. + References No definition available. + Details
Name: | hei_AccruedCustomerRebatesAndCreditsExpense
Namespace Prefix: | hei_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration