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Electric utility segment - Condensed Consolidating Statement of Changes in Common Stock Equity (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Mar. 31, 2025 | Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning balance | $ 1,505,876 | $ 1,479,089 | $ 2,377,380 | $ 2,344,841 | $ 1,479,089 | $ 2,344,841
Net income (loss) for common stock | 26,085 | 26,671 | (1,295,484) | 42,122 |  |
Other comprehensive loss, net of taxes | (306) | (460) | 1,594 | (9,801) | (766) | (8,207)
Ending balance | 1,534,432 | 1,505,876 | 1,085,273 | 2,377,380 | 1,534,432 | 1,085,273
Hawaiian Electric Consolidated |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning balance | 1,492,244 | 1,156,955 | 2,435,282 | 2,409,110 | 1,156,955 | 2,409,110
Net income (loss) for common stock | 39,150 | 47,816 | (1,229,394) | 39,221 | 86,966 | (1,190,173)
Other comprehensive loss, net of taxes | (47) | (47) | (46) | (49) | (94) | (95)
Common stock dividends | (10,000) |  | (13,000) | (13,000) | (10,000) | (26,000)
Additional paid-in capital | 270 | 287,520 |  |  | 287,790 |
Ending balance | 1,521,617 | 1,492,244 | 1,192,842 | 2,435,282 | 1,521,617 | 1,192,842
Consolidating adjustments | Hawaiian Electric Consolidated |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning balance |  | (680,414) |  | (722,211) | (680,414) | (722,211)
Net income (loss) for common stock |  |  |  |  | (17,492) | 240,075
Other comprehensive loss, net of taxes | 13 |  | 11 |  | 31 | 24
Additional paid-in capital |  |  |  |  | (458) |
Ending balance | (698,333) |  | (482,112) |  | (698,333) | (482,112)
Hawaiian Electric | Reportable Legal Entities | Hawaiian Electric Consolidated |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning balance |  | 1,156,955 |  | 2,409,110 | 1,156,955 | 2,409,110
Net income (loss) for common stock |  |  |  |  | 86,966 | (1,190,173)
Other comprehensive loss, net of taxes | (47) |  | (46) |  | (94) | (95)
Common stock dividends |  |  |  |  | (10,000) | (26,000)
Additional paid-in capital |  |  |  |  | 287,790 |
Ending balance | 1,521,617 |  | 1,192,842 |  | 1,521,617 | 1,192,842
Hawaii Electric Light | Reportable Legal Entities | Hawaiian Electric Consolidated |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning balance |  | 243,964 |  | 359,790 | 243,964 | 359,790
Net income (loss) for common stock |  |  |  |  | 9,296 | (115,905)
Other comprehensive loss, net of taxes | (4) |  | (4) |  | (11) | (7)
Additional paid-in capital |  |  |  |  | 267 |
Ending balance | 253,516 |  | 243,878 |  | 253,516 | 243,878
Maui Electric | Reportable Legal Entities | Hawaiian Electric Consolidated |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning balance |  | 282,876 |  | 362,344 | 282,876 | 362,344
Net income (loss) for common stock |  |  |  |  | 5,537 | (124,170)
Other comprehensive loss, net of taxes | (9) |  | (7) |  | (20) | (17)
Additional paid-in capital |  |  |  |  | 191 |
Ending balance | 288,584 |  | 238,157 |  | 288,584 | 238,157
Other subsidiaries | Reportable Legal Entities | Hawaiian Electric Consolidated |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning balance |  | $ 153,574 |  | $ 77 | 153,574 | 77
Net income (loss) for common stock |  |  |  |  | 2,659 |
Other comprehensive loss, net of taxes | 0 |  | 0 |  | 0 | 0
Ending balance | $ 156,233 |  | $ 77 |  | $ 156,233 | $ 77

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