XML 117 R63.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Electric utility segment - Power Purchase Agreements (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 31, 2021 | Jul. 31, 2018 MW | May 31, 2018 MW | Jun. 30, 2015 MW | May 31, 2012 MW | Mar. 31, 1988 MW | Jun. 30, 2021 MW | Mar. 31, 2021 MW | Dec. 31, 2021 USD ($) agreement MW | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 1988 MW
Puna Geothermal Venture Power Purchase Agreement |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Projects and Legal Obligations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Firm capacity volume | MW |  |  |  |  |  |  | 23.9 | 13.0 |  |  |  |
Kalaeloa |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Projects and Legal Obligations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Extension period | 10 years |  |  |  |  |  |  |  |  |  |  |
AES Hawaii |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Projects and Legal Obligations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchase commitment, period |  |  |  |  |  | 30 years |  |  |  |  |  |
Molokai New Energy Partners |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Projects and Legal Obligations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total contracted PV capacity (in megawatts) | MW |  | 4.88 |  |  |  |  |  |  |  |  |  |
Total contracted battery energy storage system capacity | MW |  | 3 |  |  |  |  |  |  |  |  |  |
Maximum power volume to be delivered (in megawatts) | MW |  | 2.64 |  |  |  |  |  |  |  |  |  |
Hawaiian Electric Company, Inc. and Subsidiaries |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Projects and Legal Obligations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchased power |  |  |  |  |  |  |  |  | $ 670,494 | $ 568,749 | $ 633,256 |
Number of power purchase agreements (PPAs) (in agreements) | agreement |  |  |  |  |  |  |  |  | 5 |  |  |
Power purchase capacity excluding agreements with smaller IPPs (in megawatts) | MW |  |  |  |  |  |  |  |  | 540.4 |  |  |
Expected fixed capacity charges, year one |  |  |  |  |  |  |  |  | $ 76,000 |  |  |
Expected fixed capacity charges, year two |  |  |  |  |  |  |  |  | 34,000 |  |  |
Expected fixed capacity charges, year three |  |  |  |  |  |  |  |  | 34,000 |  |  |
Expected fixed capacity charges, year four |  |  |  |  |  |  |  |  | 34,000 |  |  |
Expected fixed capacity charges, year five |  |  |  |  |  |  |  |  | 34,000 |  |  |
Expected fixed capacity charges, after year five through fifteen years |  |  |  |  |  |  |  |  | 161,000 |  |  |
Hawaiian Electric Company, Inc. and Subsidiaries | AES Hawaii |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Projects and Legal Obligations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchase commitment, minimum power volume required to be purchased | MW |  |  |  |  |  | 180 |  |  |  |  |  |
Purchase commitment, arbitration, additional capacity requirement | MW |  |  |  | 9 |  |  |  |  |  |  |  |
Hawaiian Electric Company, Inc. and Subsidiaries | Hu Honua Bioenergy |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Projects and Legal Obligations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchase commitment, minimum power volume required to be purchased | MW |  |  |  |  | 21.5 |  |  |  |  |  |  |
Hawaiian Electric Company, Inc. and Subsidiaries | Kalaeloa |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Projects and Legal Obligations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchased power |  |  |  |  |  |  |  |  | 204,000 | 149,000 | 214,000 |
Hawaiian Electric Company, Inc. and Subsidiaries | AES Hawaii |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Projects and Legal Obligations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchased power |  |  |  |  |  |  |  |  | 130,000 | 133,000 | 139,000 |
Hawaiian Electric Company, Inc. and Subsidiaries | HPOWER |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Projects and Legal Obligations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchased power |  |  |  |  |  |  |  |  | 70,000 | 70,000 | 76,000 |
Hawaiian Electric Company, Inc. and Subsidiaries | Hamakua Energy |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Projects and Legal Obligations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchased power |  |  |  |  |  |  |  |  | 29,000 | 50,000 | 68,000 |
Hawaiian Electric Company, Inc. and Subsidiaries | Puna Geothermal Venture |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Projects and Legal Obligations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchased power |  |  |  |  |  |  |  |  | 53,000 | 1,000 | 0 |
Hawaiian Electric Company, Inc. and Subsidiaries | Wind IPPs |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Projects and Legal Obligations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchased power |  |  |  |  |  |  |  |  | 124,000 | 105,000 | 95,000 |
Hawaiian Electric Company, Inc. and Subsidiaries | Solar IPPs |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Projects and Legal Obligations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchased power |  |  |  |  |  |  |  |  | 50,000 | 57,000 | 36,000 |
Hawaiian Electric Company, Inc. and Subsidiaries | Other IPPs |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Projects and Legal Obligations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchased power |  |  |  |  |  |  |  |  | $ 10,000 | $ 4,000 | $ 5,000 |
PGV Facility |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Projects and Legal Obligations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Power purchase capacity excluding agreements with smaller IPPs (in megawatts) | MW |  |  | 34.6 |  |  |  |  |  |  |  |  |
Hawaiian Electric | Kalaeloa |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Projects and Legal Obligations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchase capacity amounts | MW |  |  |  |  |  |  |  |  |  |  |  | 208

X
- Definition Represents the entity's aggregate capacity utilized under power purchase agreements (PPAs) excluding power purchase agreements with smaller independent power producers and schedule Q providers. + References No definition available. + Details
Name: | he_AggregateOfPowerPurchaseCapacityExcludingAgreementWithSmallerIndependentPowerProducers
Namespace Prefix: | he_
Data Type: | dtr-types:powerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate Of Power Purchase Capacity Increases From Initial Capacity + References No definition available. + Details
Name: | he_AggregateOfPowerPurchaseCapacityIncreasesFromInitialCapacity
Namespace Prefix: | he_
Data Type: | dtr-types:powerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long-term Contract For Purchase Of Electric Power, Maximum Power Volume Delivered + References No definition available. + Details
Name: | he_LongTermContractForPurchaseOfElectricPowerMaximumPowerVolumeDelivered
Namespace Prefix: | he_
Data Type: | dtr-types:powerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long-term Contract For Purchase Of Electric Power, Total Contracted Battery Energy Storage System Capacity + References No definition available. + Details
Name: | he_LongTermContractForPurchaseOfElectricPowerTotalContractedBatteryEnergyStorageSystemCapacity
Namespace Prefix: | he_
Data Type: | dtr-types:powerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long-term Contract For Purchase Of Electric Power, Total Contracted PV Capacity + References No definition available. + Details
Name: | he_LongTermContractForPurchaseOfElectricPowerTotalContractedPVCapacity
Namespace Prefix: | he_
Data Type: | dtr-types:powerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long Term Purchase Commitment, Arbitration, Additional Capacity Requirement + References No definition available. + Details
Name: | he_LongTermPurchaseCommitmentArbitrationAdditionalCapacityRequirement
Namespace Prefix: | he_
Data Type: | dtr-types:powerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long Term Purchase Commitment, Extension Period + References No definition available. + Details
Name: | he_LongTermPurchaseCommitmentExtensionPeriod
Namespace Prefix: | he_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long-Term Purchase Commitment, Minimum Power Volume Required + References No definition available. + Details
Name: | he_LongTermPurchaseCommitmentMinimumPowerVolumeRequired
Namespace Prefix: | he_
Data Type: | dtr-types:powerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of firm power purchase agreements entered into, by the company. + References No definition available. + Details
Name: | he_NumberOfPowerPurchaseAgreements
Namespace Prefix: | he_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Power Purchase Agreement, Firm Capacity Volume + References No definition available. + Details
Name: | he_PowerPurchaseAgreementFirmCapacityVolume
Namespace Prefix: | he_
Data Type: | dtr-types:powerItemType
Balance Type: | na
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
- Definition Utilities Expected Fixed Capacity Charges, After Five Through Fifteen Years + References No definition available. + Details
Name: | he_UtilitiesExpectedFixedCapacityChargesAfterFiveThroughFifteenYears
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Utilities Expected Fixed Capacity Charges, Year Five + References No definition available. + Details
Name: | he_UtilitiesExpectedFixedCapacityChargesYearFive
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Utilities Expected Fixed Capacity Charges, Year Four + References No definition available. + Details
Name: | he_UtilitiesExpectedFixedCapacityChargesYearFour
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Utilities Expected Fixed Capacity Charges, Year One + References No definition available. + Details
Name: | he_UtilitiesExpectedFixedCapacityChargesYearOne
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Utilities Expected Fixed Capacity Charges, Year Three + References No definition available. + Details
Name: | he_UtilitiesExpectedFixedCapacityChargesYearThree
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Utilities Expected Fixed Capacity Charges, Year Two + References No definition available. + Details
Name: | he_UtilitiesExpectedFixedCapacityChargesYearTwo
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Period covered by the long-term purchase commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LongtermPurchaseCommitmentPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of operating expense for purchased power of regulated operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(b)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 + Details
Name: | us-gaap_UtilitiesOperatingExpensePurchasedPower
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_LongTermContractForPurchaseOfElectricPowerAxis=he_PunaGeothermalVenturePowerPurchaseAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=he_KalaeloaPartnersLPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=he_AESHawaiianIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=he_MolokaiNewEnergyPartnersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | srt_CounterpartyNameAxis=he_HuHonuaBioenergyLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | he_MajorVendorAxis=he_KalaeloaPartnersLPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | he_MajorVendorAxis=he_AESHawaiianIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | he_MajorVendorAxis=he_HpowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | he_MajorVendorAxis=he_HamakuaEnergyPartnersLPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | he_MajorVendorAxis=he_PunaGeothermalVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | he_MajorVendorAxis=he_WindIndependentPowerProducersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | he_MajorVendorAxis=he_SolarIndependentPowerProducerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | he_MajorVendorAxis=he_OtherIndependentPowerProducersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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