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Income tax (Details) | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021
Income Tax Contingency [Line Items] |  |
Effective income tax, percent | 20.00% | 21.00%
Hawaiian Electric Company, Inc. and Subsidiaries |  |
Income Tax Contingency [Line Items] |  |
Effective income tax, percent | 21.00% | 21.00%

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + 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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- Details
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