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Maui windstorm and wildfires - Utilities Charged (Details) - Natural Disasters and Other Casualty Events - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Maui Windstorm and Wildfires
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	$ 16,933	$ 30,227
Insurance recoveries	(6,722)	(12,577)
Deferral treatment approved by the PUC	(5,683)	(7,898)
Total Maui windstorm and wildfires related expenses, net of insurance recoveries and approved deferral treatment	4,528	9,752
Legal expenses
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	8,850	14,944
Other expense
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	8,083	15,283
Hawaiian Electric Company, Inc. and Subsidiaries | Maui Windstorm and Wildfires
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	11,296	24,567
Insurance recoveries	(3,064)	(9,969)
Deferral treatment approved by the PUC	(5,683)	(7,898)
Total Maui windstorm and wildfires related expenses, net of insurance recoveries and approved deferral treatment	2,549	6,700
Income related to discontinued operations		100
Hawaiian Electric Company, Inc. and Subsidiaries | Legal expenses
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	3,849	10,735
Hawaiian Electric Company, Inc. and Subsidiaries | Other expense
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	$ 7,447	$ 13,832

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