XML 80 R57.htm IDEA: XBRL DOCUMENT
v3.22.4

Electric utility segment - Regulatory Assets and Liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021
Regulatory assets |  |
Regulatory assets | $ 242,513 | $ 565,543
Regulatory liabilities |  |
Regulatory liabilities | 1,055,650 | 996,768
Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory assets |  |
Regulatory assets | 242,513 | 565,543
Regulatory liabilities |  |
Regulatory liabilities | 1,055,650 | 996,768
Cost of removal in excess of salvage value | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory liabilities |  |
Regulatory liabilities | 577,985 | 562,514
Income taxes | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory liabilities |  |
Regulatory liabilities | 316,947 | 337,304
Decoupling revenue balancing account and RAM | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory liabilities |  |
Regulatory liabilities | 10,426 | 251
Retirement benefit plans | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory liabilities |  |
Regulatory liabilities | 81,950 | 51,734
Solar tax credits | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory liabilities |  |
Regulatory liabilities | 50,240 | 27,123
Other | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory liabilities |  |
Regulatory liabilities | $ 18,102 | 17,842
Minimum | Cost of removal in excess of salvage value | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory liabilities |  |
Authorized amortization or recovery periods | 1 year |
Minimum | Income taxes | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory liabilities |  |
Authorized amortization or recovery periods | 3 years |
Minimum | Decoupling revenue balancing account and RAM | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory liabilities |  |
Authorized amortization or recovery periods | 1 year |
Minimum | Solar tax credits | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory liabilities |  |
Authorized amortization or recovery periods | 1 year |
Minimum | Other | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory liabilities |  |
Remaining amortization or recovery periods | 1 year |
Maximum | Cost of removal in excess of salvage value | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory liabilities |  |
Authorized amortization or recovery periods | 79 years |
Maximum | Income taxes | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory liabilities |  |
Authorized amortization or recovery periods | 37 years |
Maximum | Decoupling revenue balancing account and RAM | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory liabilities |  |
Authorized amortization or recovery periods | 2 years |
Maximum | Solar tax credits | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory liabilities |  |
Authorized amortization or recovery periods | 19 years |
Maximum | Other | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory liabilities |  |
Remaining amortization or recovery periods | 3 years |
Current assets | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory assets |  |
Regulatory assets | $ 52,273 | 66,664
Long-term assets | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory assets |  |
Regulatory assets | 190,240 | 498,879
Current liabilities | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory liabilities |  |
Regulatory liabilities | 31,475 | 29,760
Long-term liabilities | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory liabilities |  |
Regulatory liabilities | 1,024,175 | 967,008
Retirement benefit plans (balance primarily varies with plans’ funded statuses) | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory assets |  |
Regulatory assets | 69,919 | 351,070
Income taxes | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory assets |  |
Regulatory assets | $ 82,583 | 88,087
Income taxes | Minimum | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory assets |  |
Authorized amortization or recovery periods | 3 years |
Income taxes | Maximum | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory assets |  |
Authorized amortization or recovery periods | 37 years |
Decoupling revenue balancing account and RAM | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory assets |  |
Regulatory assets | $ 14,290 | 31,607
Decoupling revenue balancing account and RAM | Minimum | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory assets |  |
Authorized amortization or recovery periods | 1 year |
Decoupling revenue balancing account and RAM | Maximum | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory assets |  |
Authorized amortization or recovery periods | 2 years |
Unamortized expense and premiums on retired debt and equity issuances | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory assets |  |
Regulatory assets | $ 5,967 | 7,300
Unamortized expense and premiums on retired debt and equity issuances | Minimum | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory assets |  |
Authorized amortization or recovery periods | 1 year |
Remaining amortization or recovery periods | 1 year |
Unamortized expense and premiums on retired debt and equity issuances | Maximum | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory assets |  |
Authorized amortization or recovery periods | 28 years |
Remaining amortization or recovery periods | 28 years |
Vacation earned, but not yet taken | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory assets |  |
Regulatory assets | $ 14,109 | 14,255
Authorized amortization or recovery periods | 1 year |
COVID-19 related costs (to be determined by PUC) | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory assets |  |
Regulatory assets | $ 11,403 | 27,839
ECRC and PPAC | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory assets |  |
Regulatory assets | $ 20,369 | 21,386
Authorized amortization or recovery periods | 1 year |
Other | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory assets |  |
Regulatory assets | $ 23,873 | $ 23,999
Other | Minimum | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory assets |  |
Remaining amortization or recovery periods | 1 year |
Other | Maximum | Hawaiian Electric Company, Inc. and Subsidiaries |  |
Regulatory assets |  |
Remaining amortization or recovery periods | 37 years |

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | he_RegulatoryAssets1Abstract
Namespace Prefix: | he_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | he_RegulatoryLiabilities1Abstract
Namespace Prefix: | he_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The remaining amortization period for the individual regulatory liability in a schedule of regulatory liabilities. + References No definition available. + Details
Name: | he_RegulatoryLiabilityRemainingAmortizationOrRecoveryPeriod
Namespace Prefix: | he_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amortization period for recovery of the individual regulatory noncurrent asset in a schedule of regulatory noncurrent assets. + References No definition available. + Details
Name: | he_RegulatoryNoncurrentAssetAmortizationPeriodDuration
Namespace Prefix: | he_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The remaining amortization period for recovery of the individual regulatory noncurrent asset in a schedule of regulatory noncurrent assets. + References No definition available. + Details
Name: | he_RegulatoryNoncurrentAssetRemainingAmortizationOrRecoveryPeriod
Namespace Prefix: | he_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amortization period for recovery of the individual regulatory noncurrent liability in a schedule of regulatory noncurrent liabilities. + References No definition available. + Details
Name: | he_RegulatoryNoncurrentLiabilityAmortizationPeriodDuration
Namespace Prefix: | he_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
Name: | us-gaap_RegulatoryAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 405 -Section 25 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394 + Details
Name: | us-gaap_RegulatoryLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=he_CostOfRemovalInExcessOfSalvageValueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_DeferredIncomeTaxChargesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=he_DecouplingRevenueBalancingAccountMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_PensionCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=he_SolarTaxCreditsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=he_OtherRegulatoryLiabilityMember
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_BalanceSheetLocationAxis=he_CurrentAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=he_LongTermAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=he_CurrentLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=he_LongtermLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=he_RetirementBenefitCostAssetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=us-gaap_DeferredIncomeTaxChargesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=he_DecouplingRevenueBalancingAccountMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=he_UnamortizedExpenseAndPremiumsOnRetiredDebtAndEquityIssuancesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=us-gaap_RecoverableVacationPayMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=he_COVID19RelatedCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=he_ECRCAndPPACMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=he_OtherRegulatoryAssetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |