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Maui windstorm and wildfires (Tables)
 12 Months Ended
Dec. 31, 2025
Unusual or Infrequent Items, or Both [Abstract]  
Schedule of Windstorm and Wildfire Expenses
See table below for the incremental expenses related to the Maui windstorm and wildfires.
Year ended December 31, 2025
Year ended December 31, 2024
Year ended December 31, 2023
(in thousands)
Electric utility
HEI Consolidated
Electric utility
HEI Consolidated1
Electric utility
HEI Consolidated1
Maui windstorm and wildfires related expenses:
Legal expenses$15,685 $24,383 $51,406 $69,779 $24,737 $33,969 
Wildfire tort-related claims
— — 1,915,000 1,915,000 75,000 75,000 
Wildfire securities-related claims— 47,750 — — — — 
Other expense
25,838 27,343 52,421 61,251 15,071 18,143 
Total Maui windstorm and wildfires related expenses41,523 99,476 2,018,827 2,046,030 114,808 127,112 
Insurance recoveries2
(1,129)(55,178)(85,781)(94,699)(98,613)(104,580)
Deferral treatment approved by the PUC3
(27,826)(27,826)(37,960)(37,960)(14,692)(14,692)
Total Maui windstorm and wildfires related expenses, net of insurance recoveries and approved deferral treatment$12,568 $16,472 $1,895,086 $1,913,371 $1,503 $7,840 
1    Excludes expenses related to discontinued operations amounting to $1.3 million and $11.3 million for 2024 and 2023, respectively.
2    HEI consolidated includes insurance recovery related to the proposed settlement of the securities class action of $47.8 million for 2025. Also includes adjustments related to costs that are no longer probable of recovery under the insurance policies. For 2025, HEI consolidated and Electric utility adjustments amount to $7.6 million, of which, $4.5 million were deferred to a regulatory asset, respectively, and are reported on the line “Deferral treatment approved by the PUC.”
3    Related to the PUC’s order, received on December 27, 2023, approving deferred accounting treatment for the Utilities’ incremental non-labor expenses related to the August 2023 Maui windstorm and wildfires incurred through December 31, 2024. Pursuant to the PUC order received on February 12, 2025, deferral accounting treatment limited to insurance premiums and outside services and legal costs associated with the asset-based lending facility credit agreement incurred in 2025 was granted. Applicable amounts were deferred to a regulatory asset.