Condensed Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues
Revenues	$ 895,685	$ 895,607	$ 1,823,922	$ 1,680,675
Expenses
Total expenses	802,706	808,939	1,637,425	1,494,731
Operating income (loss)
Total operating income	92,979	86,668	186,497	185,944
Retirement defined benefits credit—other than service costs	1,153	1,246	2,305	2,489
Interest expense, net—other than on deposit liabilities and other bank borrowings	(29,832)	(24,965)	(58,630)	(49,314)
Allowance for borrowed funds used during construction	1,295	798	2,426	1,576
Allowance for equity funds used during construction	3,772	2,470	7,073	4,879
Gain on sales of equity-method investment	0	0	0	8,123
Income before income taxes	69,367	66,217	139,671	153,697
Income taxes	14,284	13,203	29,394	31,043
Net income attributable to Hawaiian Electric	55,083	53,014	110,277	122,654
Preferred stock dividends of subsidiaries	473	473	946	946
Net income for common stock	$ 54,610	$ 52,541	$ 109,331	$ 121,708
Basic earnings per common share (in dollars per share)	$ 0.50	$ 0.48	$ 1.00	$ 1.11
Diluted earnings per common share (in dollars per share)	$ 0.50	$ 0.48	$ 1.00	$ 1.11
Weighted-average number of common shares outstanding (in shares)	109,573	109,432	109,544	109,397
Net effect of potentially dilutive shares (share-based compensation programs) (in shares)	207	230	326	317
Weighted-average shares assuming dilution (in shares)	109,780	109,662	109,870	109,714
Electric utility
Revenues
Revenues	$ 794,191	$ 818,873	$ 1,624,552	$ 1,527,665
Expenses
Total expenses	720,566	747,719	1,475,052	1,382,916
Operating income (loss)
Total operating income	73,625	71,154	149,500	144,749
Income before income taxes	58,868	56,613	119,976	116,059
Income taxes	13,070	11,979	26,670	24,517
Net income attributable to Hawaiian Electric	45,798	44,634	93,306	91,542
Preferred stock dividends of subsidiaries	499	499	998	998
Net income for common stock	45,299	44,135	92,308	90,544
Bank
Revenues
Revenues	96,885	75,324	190,742	150,439
Expenses
Total expenses	72,017	53,401	142,354	98,486
Operating income (loss)
Total operating income	24,868	21,923	48,388	51,953
Income before income taxes	25,055	22,109	48,762	52,324
Income taxes	4,851	4,643	9,996	10,988
Net income attributable to Hawaiian Electric	20,204	17,466	38,766	41,336
Preferred stock dividends of subsidiaries	0	0	0	0
Net income for common stock	20,204	17,466	38,766	41,336
Other
Revenues
Revenues	4,609	1,410	8,628	2,571
Expenses
Total expenses	10,123	7,819	20,019	13,329
Operating income (loss)
Total operating income	(5,514)	(6,409)	(11,391)	(10,758)
Income before income taxes	(14,556)	(12,505)	(29,067)	(14,686)
Income taxes	(3,637)	(3,419)	(7,272)	(4,462)
Net income attributable to Hawaiian Electric	(10,919)	(9,086)	(21,795)	(10,224)
Preferred stock dividends of subsidiaries	(26)	(26)	(52)	(52)
Net income for common stock	$ (10,893)	$ (9,060)	$ (21,743)	$ (10,172)