Maui windstorm and wildfires - Schedule of Utilities Charged (Details) - Natural Disasters and Other Casualty Events - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Maui Windstorm and Wildfires
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	$ 99,476	$ 2,046,030	$ 127,112
Insurance recoveries	(55,178)	(94,699)	(104,580)
Deferral treatment approved by the PUC	(27,826)	(37,960)	(14,692)
Total Maui windstorm and wildfires related expenses, net of insurance recoveries and approved deferral treatment	16,472	1,913,371	7,840
Legal expenses
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	24,383	69,779	33,969
Wildfire tort-related claims
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	0	1,915,000	75,000
Wildfire securities-related claims
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	47,750	0	0
Other expense
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	27,343	61,251	18,143
Hawaiian Electric Company, Inc. and Subsidiaries \| Maui Windstorm and Wildfires
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	41,523	2,018,827	114,808
Insurance recoveries	(1,129)	(85,781)	(98,613)
Deferral treatment approved by the PUC	(27,826)	(37,960)	(14,692)
Total Maui windstorm and wildfires related expenses, net of insurance recoveries and approved deferral treatment	12,568	1,895,086	1,503
Income related to discontinued operations		1,300	11,300
Adjustments amount	7,600
Deferred to a regulatory asset	4,500
Hawaiian Electric Company, Inc. and Subsidiaries \| Legal expenses
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	15,685	51,406	24,737
Hawaiian Electric Company, Inc. and Subsidiaries \| Wildfire tort-related claims
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	0	1,915,000	75,000
Hawaiian Electric Company, Inc. and Subsidiaries \| Wildfire securities-related claims
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	0	0	0
Hawaiian Electric Company, Inc. and Subsidiaries \| Other expense
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	$ 25,838	$ 52,421	$ 15,071

HAWAIIAN ELECTRIC INDUSTRIES INC 10-K