XML 25 R12.htm IDEA: XBRL DOCUMENT
v3.23.1

Condensed Consolidated Statements of Comprehensive Income (unaudited) - HECO (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Retirement benefit plans: |  |
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, tax | $ (122) | $ 1,562
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, tax | 147 | (1,500)
Hawaiian Electric Company, Inc. and Subsidiaries |  |
Retirement benefit plans: |  |
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, tax | (163) | 1,518
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, tax | $ 147 | $ (1,500)

X
- Definition Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit) Recognized In Net Periodic Benefit Cost, Reclassification Adjustment From AOCI Tax + References No definition available. + Details
Name: | he_OtherComprehensiveIncomeLossDefinedBenefitPlanPriorServiceCostCreditRecognizedInNetPeriodicBenefitCostReclassificationAdjustmentFromAOCITax
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of income taxes on the reclassification adjustments on pension and post retirement benefits for the accounting impact of the decisions issued by the Public Utilities Commission. + References No definition available. + Details
Name: | he_OtherComprehensiveIncomeReclassificationAdjustmentForImpactOfDecisionAndOrdersOfThePUCIncludedInRegulatoryAssetsTax
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Details
Name: | dei_LegalEntityAxis=he_HawaiianElectricCompanyAndSubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |