SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Valuation and qualifying accounts
Bad debt expenses deferred to regulatory assets	$ 2,700	$ 16,200	$ 10,700
Bill credits			2,000
Allowance for uncollectible accounts – electric utility \| Hawaiian Electric Company, Inc. and Subsidiaries
Valuation and qualifying accounts
Balance at beginning of period	6,111	26,100	17,809
Charged to costs and expenses	8,161	6,028	4,183
Charged to other accounts	(665)	(14,626)	11,795
Deductions	9,047	11,391	7,687
Balance at end of period	$ 4,560	$ 6,111	$ 26,100

Customer Bill Forgiveness

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- Definition

Valuation Allowances And Reserves, Additions, Bad Debt Expenses Deferred To Regulatory Assets

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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- Definition

Amount of valuation and qualifying accounts and reserves.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09(Column B))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-4

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09(Column E))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-4

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- Definition

Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense.

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- Definition

Amount of increase in valuation and qualifying accounts and reserves from charge to accounts other than cost and expense.

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- Definition

Amount of decrease in valuation and qualifying accounts and reserves.

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