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Credit agreement and changes in debt - Narrative (Details) - Hawaiian Electric Company, Inc. and Subsidiaries | Feb. 18, 2022 USD ($) extensionOption | Jun. 30, 2022 USD ($) | Dec. 31, 2021 USD ($) | May 14, 2021 USD ($) institution
--- | --- | --- | --- | ---
Credit Facilities |  |  |  |
Credit agreement |  |  |  |
Number of financial institutions | institution |  |  |  | 9
Credit agreement |  | $ 0 | $ 0 |
HEI Facility |  |  |  |
Credit agreement |  |  |  |
Credit agreement |  |  |  | $ 175,000,000
Hawaiian Electric Facility |  |  |  |
Credit agreement |  |  |  |
Credit agreement | $ 275,000,000 |  |  | $ 200,000,000
Number of extension options | extensionOption | 2 |  |  |
Extension period | 1 year |  |  |

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- Definition Line Of Credit Facility, Number Of Extension Options + References No definition available. + Details
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- Definition Represents the number of financial institutions with which the entity entered into a revolving Non Collateralized credit agreement with a letter of credit sub-facility. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Details
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- Details
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