Long-term Contract For Purchase Of Electric Power, Maximum Power Volume Delivered

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- Definition

Long-term Contract For Purchase Of Electric Power, Total Contracted Battery Energy Storage System Capacity

+ References

No definition available.

+ Details

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- Definition

Long-term Contract For Purchase Of Electric Power, Total Contracted PV Capacity

+ References

No definition available.

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- Definition

Long-Term Purchase Commitment, Minimum Power Volume Required

+ References

No definition available.

+ Details

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- Definition

Loss Contingency, Property Insurance Coverage

+ References

No definition available.

+ Details

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- Definition

Represents the number of firm power purchase agreements entered into, by the company.

+ References

No definition available.

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- Definition

Number Of Purchase Contracts

+ References

No definition available.

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- Definition

Public Utilities, Approved Funds, Net Of Other Existing Project Costs

+ References

No definition available.

+ Details

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- Definition

Public Utilities, Electric Grid Project, Approved Funds

+ References

No definition available.

+ Details

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- Definition

Public Utilities, Electric Grid Project, Period

+ References

No definition available.

+ Details

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- Definition

Public Utilities, Number Of Fuel-Flexible Combustion Turbines

+ References

No definition available.

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- Definition

Public Utilities, Number Of Gas Turbines Acquired

+ References

No definition available.

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- Definition

Public Utilities, Number Of Replaced Turbines

+ References

No definition available.

+ Details

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- Definition

Public Utilities, Project Cost Recovery Cap

+ References

No definition available.

+ Details

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- Definition

Public Utilities, Project Costs Incurred

+ References

No definition available.

+ Details

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- Definition

Public Utilities, Renewable Energy Generation Project, Approved Funds

+ References

No definition available.

+ Details

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- Definition

Public Utilities, Renewable Energy Generation Project, Approved Funds With Inflationary Adjustment

+ References

No definition available.

+ Details

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- Definition

Public Utilities, Renewable Energy Generation Project, Commitment Cost, Maximum Percentage Increase

+ References

No definition available.

+ Details

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- Definition

Public Utilities, Renewable Energy Generation Project, Estimated Annual Flooding Percentage

+ References

No definition available.

+ Details

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- Definition

Public Utilities, Renewable Energy Generation Project, Estimated Cost

+ References

No definition available.

+ Details

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- Definition

Public Utilities, Renewable Energy Generation Project, Incurred Cost

+ References

No definition available.

+ Details

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- Definition

Public Utilities, Renewable Energy Generation Project, Revised Estimated Cost

+ References

No definition available.

+ Details

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- Definition

Public Utilities, Renewable Firm Generation Capacity

+ References

No definition available.

+ Details

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Namespace Prefix:	he_
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- Definition

Represents the amount of additional accrued investigation and estimated cleanup costs.

+ References

No definition available.

+ Details

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- Definition

Risk Mitigation Strategies, Period Of Implementation

+ References

No definition available.

+ Details

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- Definition

Total costs accrued as of the balance sheet date for environmental loss contingencies.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-1

Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef
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-Name Accounting Standards Codification
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-URI https://asc.fasb.org/1943274/2147481931/410-30-50-10

Reference 3: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 410
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481931/410-30-50-10

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 410
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
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Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
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-URI https://asc.fasb.org/1943274/2147481931/410-30-50-7

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- Definition

The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(3))
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

+ References

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- Definition

Number of defendants named in a legal action.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
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- Definition

Percentage of public utility's approved equity to capital, including debt and equity.

+ References

No definition available.

+ Details

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- Definition

Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
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Electric utility segment - Commitments and Contingencies (Details) $ in Millions							1 Months Ended					6 Months Ended
	Jul. 29, 2026 USD ($)	Apr. 17, 2026 USD ($)	Mar. 23, 2026 USD ($)	Feb. 13, 2026 defendent	Dec. 31, 2025 USD ($)	Jan. 31, 2024 USD ($)	Dec. 31, 2025 USD ($)	Jul. 31, 2025	Dec. 31, 2023 USD ($)	Sep. 30, 2020 MW	Jul. 31, 2018 MW	Jun. 30, 2026 USD ($) agreement MW	Jul. 16, 2026 USD ($)	Jun. 25, 2026 USD ($)	Apr. 28, 2026 contract gasTurbine	Oct. 17, 2025 USD ($)	Mar. 28, 2025 USD ($) turbine MW	Aug. 07, 2024 USD ($)
Long-term Purchase Commitment [Line Items]
Purchase obligation					$ 2,630.0		$ 2,630.0
Waena Battery Energy Storage System Project
Long-term Purchase Commitment [Line Items]
Total contracted battery energy storage system capacity (in megawatts) \| MW										40
Molokai New Energy Partners
Long-term Purchase Commitment [Line Items]
Total contracted PV capacity (in megawatts) \| MW											4.88
Total contracted battery energy storage system capacity (in megawatts) \| MW											3
Maximum power volume to be delivered (in megawatts) \| MW											2.64
Hawaiian Electric Company, Inc. and Subsidiaries
Long-term Purchase Commitment [Line Items]
Insurance recoveries												$ 9.6
Property insurance coverage												500.0
Public utilities, project cost recovery cap																		$ 95.0
Project costs incurred												49.1
Hawaiian Electric Company, Inc. and Subsidiaries \| Subsequent Event
Long-term Purchase Commitment [Line Items]
Public utilities, project cost recovery cap													$ 92.6
Hawaiian Electric Company, Inc. and Subsidiaries \| Waena Battery Energy Storage System Project
Long-term Purchase Commitment [Line Items]
Renewable energy generation project, approved funds									$ 82.1
Public utilities, approved estimated capital costs (as percent)								20.00%
Renewable energy generation project, incurred cost												27.2
Hawaiian Electric Company, Inc. and Subsidiaries \| Climate Adaptation Transmission and Distribution Resilience Program
Long-term Purchase Commitment [Line Items]
Public utilities, electric grid project, approved funds						$ 189.7
Project period (in years)						5 years
Hawaiian Electric Company, Inc. and Subsidiaries \| Waiau Repower Project
Long-term Purchase Commitment [Line Items]
Renewable energy generation project, approved funds		$ 847.0	$ 847.0
Public utilities, renewable energy generation project, estimated cost																	$ 847.0
Number of existing turbines being replaced \| turbine																	6
Number of fuel-flexible combustion turbines \| turbine																	6
Public utilities, renewable firm generation capacity (in megawatts) \| MW																	253
Public utilities, renewable energy generation project, revised estimated cost																$ 1,160.0
Public utilities, commitment cost, maximum percentage increase (as percent)			10.00%
Approved funds with inflationary adjustment														$ 908.0
Public utilities, renewable energy generation project, estimated annual flooding percentage (as percent)							1.00%
Hawaiian Electric Company, Inc. and Subsidiaries \| Wildfire Mitigation Plan (WMP)
Long-term Purchase Commitment [Line Items]
Project costs incurred												$ 101.0
Risk mitigation strategies, period of implementation					3 years
Approved funds, net of other existing project costs														$ 350.0
Hawaiian Electric Company, Inc. and Subsidiaries \| Stage 1 and Stage 2 Renewable P P
Long-term Purchase Commitment [Line Items]
Total contracted PV capacity (in megawatts) \| MW												1,771
Number of power purchase agreements (PPAs) (in agreements) \| agreement												9
Minimum power volume required (in megawatts) \| MW												301.5
Hawaiian Electric Company, Inc. and Subsidiaries \| GE Vernova Operations, LLC \| Waiau Repower Project
Long-term Purchase Commitment [Line Items]
Number of contracts entered \| contract															3
Number of gas turbines acquired \| gasTurbine															6
Maui Electric
Long-term Purchase Commitment [Line Items]
Additional accrued investigation and estimated cleanup costs												$ 2.4
Hawaiian Electric \| PCB Contamination
Long-term Purchase Commitment [Line Items]
Valuation allowances and reserves												$ 9.3
Property Insurer Litigation \| Hawaiian Electric Industries, Inc., Hawaiian Electric Company, Inc., and Maui Electric Company, Limited
Long-term Purchase Commitment [Line Items]
Number of defendants \| defendent				4
Maui Windstorm And Wildfires Hawaiian Electric Plaintiffs \| Subsequent Event
Long-term Purchase Commitment [Line Items]
Loss contingency, damages sought, value	$ 40.7