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Electric utility segment - Condensed Consolidating Statement of Income (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Condensed Income Statements, Captions [Line Items] |  |
Revenues | $ 744,070 | $ 792,014
Expenses |  |
Total expenses | 681,650 | 741,127
Operating income | 62,420 | 50,887
Allowance for equity funds used during construction | 3,585 | 3,640
Retirement defined benefits credit (expense)—other than service costs | 917 | 1,001
Allowance for borrowed funds used during construction | 1,417 | 1,386
Interest income | 12,623 | 3,133
Income before income taxes | 33,539 | 28,456
Income taxes | 6,395 | 6,795
Net income attributable to Hawaiian Electric | 27,144 | 42,595
Preferred stock dividends of Hawaiian Electric | 473 | 473
Net income for common stock | 26,671 | 42,122
Hawaiian Electric Consolidated |  |
Condensed Income Statements, Captions [Line Items] |  |
Revenues | 738,366 | 788,578
Expenses |  |
Fuel oil | 238,721 | 284,296
Purchased power | 146,717 | 159,817
Other operation and maintenance | 143,108 | 143,890
Depreciation | 64,019 | 62,812
Taxes, other than income taxes | 69,864 | 74,408
Total expenses | 662,429 | 725,223
Operating income | 75,937 | 63,355
Allowance for equity funds used during construction | 3,585 | 3,640
Equity in earnings of subsidiaries | 0 | 0
Retirement defined benefits credit (expense)—other than service costs | 1,051 | 1,072
Interest expense and other charges, net | (22,452) | (19,985)
Allowance for borrowed funds used during construction | 1,417 | 1,386
Interest income | 1,981 | 1,432
Income before income taxes | 61,519 | 50,900
Income taxes | 13,204 | 11,180
Net income | 48,315 | 39,720
Preferred stock dividends of subsidiaries | 229 | 229
Net income attributable to Hawaiian Electric | 48,086 | 39,491
Preferred stock dividends of Hawaiian Electric | 270 | 270
Net income for common stock | 47,816 | 39,221
Consolidating adjustments | Hawaiian Electric Consolidated |  |
Condensed Income Statements, Captions [Line Items] |  |
Revenues | (3,294) | 0
Expenses |  |
Fuel oil | 0 | 0
Purchased power | 0 | 0
Other operation and maintenance | (3,294) | 0
Depreciation | 0 | 0
Taxes, other than income taxes | 0 | 0
Total expenses | (3,294) | 0
Operating income | 0 | 0
Allowance for equity funds used during construction | 0 | 0
Equity in earnings of subsidiaries | (9,725) | (6,024)
Retirement defined benefits credit (expense)—other than service costs | 0 | 0
Interest expense and other charges, net | 1,123 | 1,452
Allowance for borrowed funds used during construction | 0 | 0
Interest income | (1,123) | (1,452)
Income before income taxes | (9,725) | (6,024)
Income taxes | 0 | 0
Net income | (9,725) | (6,024)
Preferred stock dividends of subsidiaries | 0 | 0
Net income attributable to Hawaiian Electric | (9,725) | (6,024)
Preferred stock dividends of Hawaiian Electric | 0 | 0
Net income for common stock | (9,725) | (6,024)
Hawaiian Electric | Reportable Legal Entities | Hawaiian Electric Consolidated |  |
Condensed Income Statements, Captions [Line Items] |  |
Revenues | 524,703 | 564,180
Expenses |  |
Fuel oil | 171,793 | 210,199
Purchased power | 110,731 | 117,518
Other operation and maintenance | 91,493 | 90,884
Depreciation | 42,573 | 42,004
Taxes, other than income taxes | 49,779 | 53,409
Total expenses | 466,369 | 514,014
Operating income | 58,334 | 50,166
Allowance for equity funds used during construction | 2,795 | 2,821
Equity in earnings of subsidiaries | 9,725 | 6,024
Retirement defined benefits credit (expense)—other than service costs | 905 | 927
Interest expense and other charges, net | (17,024) | (14,292)
Allowance for borrowed funds used during construction | 1,168 | 1,079
Interest income | 2,788 | 2,663
Income before income taxes | 58,691 | 49,388
Income taxes | 10,605 | 9,897
Net income | 48,086 | 39,491
Preferred stock dividends of subsidiaries | 0 | 0
Net income attributable to Hawaiian Electric | 48,086 | 39,491
Preferred stock dividends of Hawaiian Electric | 270 | 270
Net income for common stock | 47,816 | 39,221
Hawaii Electric Light | Reportable Legal Entities | Hawaiian Electric Consolidated |  |
Condensed Income Statements, Captions [Line Items] |  |
Revenues | 108,311 | 117,609
Expenses |  |
Fuel oil | 26,794 | 31,185
Purchased power | 25,490 | 32,056
Other operation and maintenance | 28,034 | 24,590
Depreciation | 11,243 | 10,964
Taxes, other than income taxes | 10,179 | 10,957
Total expenses | 101,740 | 109,752
Operating income | 6,571 | 7,857
Allowance for equity funds used during construction | 347 | 349
Equity in earnings of subsidiaries | 0 | 0
Retirement defined benefits credit (expense)—other than service costs | 168 | 168
Interest expense and other charges, net | (2,747) | (2,914)
Allowance for borrowed funds used during construction | 95 | 107
Interest income | 229 | 155
Income before income taxes | 4,663 | 5,722
Income taxes | 933 | 1,198
Net income | 3,730 | 4,524
Preferred stock dividends of subsidiaries | 134 | 134
Net income attributable to Hawaiian Electric | 3,596 | 4,390
Preferred stock dividends of Hawaiian Electric | 0 | 0
Net income for common stock | 3,596 | 4,390
Maui Electric | Reportable Legal Entities | Hawaiian Electric Consolidated |  |
Condensed Income Statements, Captions [Line Items] |  |
Revenues | 105,702 | 106,789
Expenses |  |
Fuel oil | 40,134 | 42,912
Purchased power | 10,496 | 10,243
Other operation and maintenance | 26,211 | 28,416
Depreciation | 10,203 | 9,844
Taxes, other than income taxes | 9,906 | 10,042
Total expenses | 96,950 | 101,457
Operating income | 8,752 | 5,332
Allowance for equity funds used during construction | 443 | 470
Equity in earnings of subsidiaries | 0 | 0
Retirement defined benefits credit (expense)—other than service costs | (22) | (23)
Interest expense and other charges, net | (3,804) | (4,231)
Allowance for borrowed funds used during construction | 154 | 200
Interest income | 87 | 66
Income before income taxes | 5,610 | 1,814
Income taxes | 1,079 | 85
Net income | 4,531 | 1,729
Preferred stock dividends of subsidiaries | 95 | 95
Net income attributable to Hawaiian Electric | 4,436 | 1,634
Preferred stock dividends of Hawaiian Electric | 0 | 0
Net income for common stock | 4,436 | 1,634
Other subsidiaries | Reportable Legal Entities | Hawaiian Electric Consolidated |  |
Condensed Income Statements, Captions [Line Items] |  |
Revenues | 2,944 | 0
Expenses |  |
Fuel oil | 0 | 0
Purchased power | 0 | 0
Other operation and maintenance | 664 | 0
Depreciation | 0 | 0
Taxes, other than income taxes | 0 | 0
Total expenses | 664 | 0
Operating income | 2,280 | 0
Allowance for equity funds used during construction | 0 | 0
Equity in earnings of subsidiaries | 0 | 0
Retirement defined benefits credit (expense)—other than service costs | 0 | 0
Interest expense and other charges, net | 0 | 0
Allowance for borrowed funds used during construction | 0 | 0
Interest income | 0 | 0
Income before income taxes | 2,280 | 0
Income taxes | 587 | 0
Net income | 1,693 | 0
Preferred stock dividends of subsidiaries | 0 | 0
Net income attributable to Hawaiian Electric | 1,693 | 0
Preferred stock dividends of Hawaiian Electric | 0 | 0
Net income for common stock | $ 1,693 | $ 0

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