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Subsequent event (Details) - Subsequent Event $ / shares in Units, $ in Millions | Oct. 15, 2025 USD ($) $ / shares
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Hawaiian Electric Company, Inc. and Subsidiaries |
Subsequent Event [Line Items] |
Amount of cumulative preferred stock redeemed | $ | $ 35.3
Redemption of cumulative preferred stock | $ | $ 1.8
Series C, D, E, H, J, K Preferred Stock | Hawaiian Electric, Parent |
Subsequent Event [Line Items] |
Voluntary liquidation price (in dollars per share) | $ 20
Redemption price (in dollars per share) | 21
Series I Preferred Stock | Hawaiian Electric, Parent |
Subsequent Event [Line Items] |
Voluntary liquidation price (in dollars per share) | 20
Redemption price (in dollars per share) | 20
Series G Preferred Stock | Hawaii Electric Light Company, Inc |
Subsequent Event [Line Items] |
Voluntary liquidation price (in dollars per share) | 100
Redemption price (in dollars per share) | 100
Series H Preferred Stock | Maui Electric |
Subsequent Event [Line Items] |
Voluntary liquidation price (in dollars per share) | 100
Redemption price (in dollars per share) | $ 100

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- Definition Preferred Stock, Voluntary Liquidation Preference Per Share + References No definition available. + Details
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- Definition The excess of (1) fair value of the consideration transferred to the holders of the preferred stock over (2) the carrying amount of the preferred stock in the registrant's balance sheet, during the accounting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480408/260-10-S99-2 + Details
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- Definition The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-5 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-11 + Details
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- Definition Cash inflows (outflows) from issuing and redeeming redeemable preferred stock; includes convertible and nonconvertible redeemable preferred stock. + References No definition available. + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481674/830-30-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 855 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483399/855-10-50-2 + Details
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