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Maui windstorm and wildfires - Utilities Charged (Details) - Natural Disasters and Other Casualty Events $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Maui Windstorm and Wildfires
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	$ 138,383
Insurance recovery	(104,580)
Deferral treatment approved by the PUC	(14,692)
Total Maui windstorm and wildfires related expenses, net of insurance recoveries and approved deferral treatment	19,111
Legal expenses
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	34,876
One ‘Ohana Initiative contribution
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	75,000
Other expense
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	28,507
Hawaiian Electric Company, Inc. and Subsidiaries
Public Utilities, General Disclosures [Line Items]
Insurance reimbursement receivable	75,000
Hawaiian Electric Company, Inc. and Subsidiaries | Maui Windstorm and Wildfires
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	114,808
Insurance recovery	(98,613)
Deferral treatment approved by the PUC	(14,692)
Total Maui windstorm and wildfires related expenses, net of insurance recoveries and approved deferral treatment	1,503
Hawaiian Electric Company, Inc. and Subsidiaries | Legal expenses
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	24,737
Hawaiian Electric Company, Inc. and Subsidiaries | One ‘Ohana Initiative contribution
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	75,000
Insurance reimbursement receivable	75,000
Hawaiian Electric Company, Inc. and Subsidiaries | Other expense
Public Utilities, General Disclosures [Line Items]
Total Maui windstorm and wildfires related expenses	$ 15,071

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