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Basis of presentation (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2023 | Mar. 31, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Net income (loss) for common stock | $ (1,295,484) | $ 42,122 | $ 54,610 | $ 54,721 | $ (1,253,362) | $ 109,331 |
Cash and cash equivalents | 550,408 |  | 314,284 |  | 550,408 | 314,284 | $ 679,546
Hawaiian Electric |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Cash and cash equivalents | 124,400 |  |  |  | 124,400 |  |
Hawaiian Electric Company, Inc. and Subsidiaries |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Net income (loss) for common stock | (1,229,394) | $ 39,221 | 45,299 | $ 47,009 | (1,190,173) | 92,308 |
Cash and cash equivalents | 88,620 |  | $ 143,647 |  | 88,620 | $ 143,647 | $ 106,077
Hawaiian Electric Company, Inc. and Subsidiaries | Wildfire tort-related claims | Natural Disasters and Other Casualty Events |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Estimated loss liabilities | $ 1,710,000 |  |  |  | $ 1,710,000 |  |

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