XML 52 R38.htm IDEA: XBRL DOCUMENT
v3.21.2

Electric utility segment - Annual decoupling filings summary (Details) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2021 USD ($)
Regulatory Projects and Legal Obligations [Line Items] |
2022 ARA revenues | $ 29.5
Management Audit savings commitment | (6.6)
Net 2022 ARA revenues | 22.9
Incremental RAM revenues and ARA revenues | 61.5
Incremental accrued RBA balance through September 30, 2021 (and associated revenue taxes) | 24.3
Incremental Performance Incentive Mechanisms (net) | 0.1
Incremental MPIR/EPRM Revenue Adjustment | 10.4
Net incremental amount to be collected under the RBA rate tariffs | 96.2
Hawaiian Electric, Parent |
Regulatory Projects and Legal Obligations [Line Items] |
2022 ARA revenues | 19.8
Management Audit savings commitment | (4.6)
Net 2022 ARA revenues | 15.2
Incremental RAM revenues and ARA revenues | 41.7
Incremental accrued RBA balance through September 30, 2021 (and associated revenue taxes) | 21.9
Incremental Performance Incentive Mechanisms (net) | 0.0
Incremental MPIR/EPRM Revenue Adjustment | 9.8
Net incremental amount to be collected under the RBA rate tariffs | 73.4
Hawaii Electric Light |
Regulatory Projects and Legal Obligations [Line Items] |
2022 ARA revenues | 4.9
Management Audit savings commitment | (1.0)
Net 2022 ARA revenues | 3.9
Incremental RAM revenues and ARA revenues | 8.9
Incremental accrued RBA balance through September 30, 2021 (and associated revenue taxes) | 2.5
Incremental Performance Incentive Mechanisms (net) | 0.0
Incremental MPIR/EPRM Revenue Adjustment | 0.3
Net incremental amount to be collected under the RBA rate tariffs | 11.7
Maui Electric |
Regulatory Projects and Legal Obligations [Line Items] |
2022 ARA revenues | 4.8
Management Audit savings commitment | (1.0)
Net 2022 ARA revenues | 3.8
Incremental RAM revenues and ARA revenues | 10.9
Incremental accrued RBA balance through September 30, 2021 (and associated revenue taxes) | (0.1)
Incremental Performance Incentive Mechanisms (net) | 0.1
Incremental MPIR/EPRM Revenue Adjustment | 0.3
Net incremental amount to be collected under the RBA rate tariffs | $ 11.1

X
- Definition Public Utilities, Annual Revenue Adjustment, Management Audit Savings Commitment + References No definition available. + Details
Name: | he_PublicUtilitiesAnnualRevenueAdjustmentManagementAuditSavingsCommitment
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public Utilities, Annual Revenue Adjustment, Net Incremental Revenues + References No definition available. + Details
Name: | he_PublicUtilitiesAnnualRevenueAdjustmentNetIncrementalRevenues
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public Utilities, Annual Revenue Adjustment, Revenues + References No definition available. + Details
Name: | he_PublicUtilitiesAnnualRevenueAdjustmentRevenues
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public Utilities, Decoupling Filing, Performance Incentive Mechanism, Net + References No definition available. + Details
Name: | he_PublicUtilitiesDecouplingFilingPerformanceIncentiveMechanismNet
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public Utilities, Incremental Major Project Interim Recovery And Exceptional Project Recovery Mechanism Adjustment + References No definition available. + Details
Name: | he_PublicUtilitiesIncrementalMajorProjectInterimRecoveryAndExceptionalProjectRecoveryMechanismAdjustment
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public Utility, Annual Incremental Rate Adjustment Mechanism Adjusted Revenue + References No definition available. + Details
Name: | he_PublicUtilityAnnualIncrementalRateAdjustmentMechanismAdjustedRevenue
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public Utility, Increase (Decrease) In Accrued Earnings Sharing Credits To Be Refunded + References No definition available. + Details
Name: | he_PublicUtilityIncreaseDecreaseInAccruedEarningsSharingCreditsToBeRefunded
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public Utility, Net Receivable Under Tariff + References No definition available. + Details
Name: | he_PublicUtilityNetReceivableUnderTariff
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | he_RegulatoryProjectsAndLegalObligationsLineItems
Namespace Prefix: | he_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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

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