Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenues
Total revenues	$ 3,086,896	$ 3,219,850	$ 3,287,503
Expenses
Total expenses	2,851,574	4,926,610	3,012,511
Operating income (loss)
Operating income (loss)	235,322	(1,706,760)	274,992
Retirement defined benefits credit—other than service costs	3,482	3,754	4,014
Interest expense, net	(117,334)	(127,207)	(125,532)
Allowance for borrowed funds used during construction	5,893	5,470	5,201
Allowance for equity funds used during construction	15,013	13,786	15,164
Interest income	36,929	19,362	9,105
Loss on sales of subsidiaries and equity-method investments and impairment loss on assets sold and held for sale	(12,376)	0	(644)
Income (loss) from continuing operations before income taxes	166,929	(1,791,595)	182,300
Income tax expense (benefit)	40,648	(470,962)	34,534
Income (loss) from continuing operations	126,281	(1,320,633)	147,766
Dividends on and loss on redemption of preferred stock of Hawaiian Electric	3,161	1,890	1,890
Income (loss) from continuing operations for common stock	123,120	(1,322,523)	145,876
Income (loss) from discontinued operations	0	(103,486)	53,362
Net income (loss) for common stock	$ 123,120	$ (1,426,009)	$ 199,238
Continuing operations - Basic earnings (loss) per common share (in dollars per share)	$ 0.71	$ (10.42)	$ 1.33
Discontinued operations - Basic earnings (loss) per common share (in dollars per share)	0	(0.81)	0.49
Basic earnings (loss) per common share (in dollars per share)	0.71	(11.23)	1.82
Continuing operations - Diluted earnings (loss) per common share (in dollars per share)	0.71	(10.42)	1.33
Discontinued operations - Diluted earnings (loss) per common share (in dollars per share)	0	(0.81)	0.48
Diluted earnings (loss) per common share (in dollars per share)	$ 0.71	$ (11.23)	$ 1.81
Weighted-average number of common shares outstanding (in shares)	172,553	126,927	109,739
Net effect of potentially dilutive shares (share-based compensation programs) (in shares)	464	0	299
Weighted-average shares assuming dilution (in shares)	173,017	126,927	110,038
Electric utility
Revenues
Total revenues	$ 3,071,182	$ 3,206,700	$ 3,269,521
Expenses
Total expenses	2,791,396	4,818,558	2,967,363
Operating income (loss)
Operating income (loss)	279,786	(1,611,858)	302,158
Other
Revenues
Total revenues	15,714	13,150	17,982
Expenses
Total expenses	60,178	108,052	45,148
Operating income (loss)
Operating income (loss)	$ (44,464)	$ (94,902)	$ (27,166)