Condensed Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues
Revenues	$ 895,607	$ 680,257	$ 1,680,675	$ 1,323,203
Expenses
Total expenses	808,939	578,401	1,494,731	1,123,316
Operating income (loss)
Total operating income	86,668	101,856	185,944	199,887
Retirement defined benefits credit—other than service costs	1,246	1,216	2,489	3,651
Interest expense, net—other than on deposit liabilities and other bank borrowings	(24,965)	(23,317)	(49,314)	(47,053)
Allowance for borrowed funds used during construction	798	812	1,576	1,559
Allowance for equity funds used during construction	2,470	2,377	4,879	4,568
Gain on sales of investment securities, net and equity-method investment	0	0	8,123	528
Income before income taxes	66,217	82,944	153,697	163,140
Income taxes	13,203	18,599	31,043	33,964
Net income attributable to Hawaiian Electric	53,014	64,345	122,654	129,176
Preferred stock dividends of subsidiaries	473	473	946	946
Net income for common stock	$ 52,541	$ 63,872	$ 121,708	$ 128,230
Basic earnings per common share (in dollars per share)	$ 0.48	$ 0.58	$ 1.11	$ 1.17
Diluted earnings per common share (in dollars per share)	$ 0.48	$ 0.58	$ 1.11	$ 1.17
Weighted-average number of common shares outstanding (in shares)	109,432	109,282	109,397	109,252
Net effect of potentially dilutive shares (in shares)	230	233	317	305
Weighted-average shares assuming dilution (in shares)	109,662	109,515	109,714	109,557
Electric utility
Revenues
Revenues	$ 818,873	$ 601,879	$ 1,527,665	$ 1,166,743
Expenses
Total expenses	747,719	534,195	1,382,916	1,029,945
Operating income (loss)
Total operating income	71,154	67,684	144,749	136,798
Income before income taxes	56,613	53,898	116,059	108,988
Income taxes	11,979	11,498	24,517	22,731
Net income attributable to Hawaiian Electric	44,634	42,400	91,542	86,257
Preferred stock dividends of subsidiaries	499	499	998	998
Net income for common stock	44,135	41,901	90,544	85,259
Bank
Revenues
Revenues	75,324	77,260	150,439	154,391
Expenses
Total expenses	53,401	37,454	98,486	79,289
Operating income (loss)
Total operating income	21,923	39,806	51,953	75,102
Income before income taxes	22,109	39,992	52,324	77,094
Income taxes	4,643	9,708	10,988	17,254
Net income attributable to Hawaiian Electric	17,466	30,284	41,336	59,840
Preferred stock dividends of subsidiaries	0	0	0	0
Net income for common stock	17,466	30,284	41,336	59,840
Other
Revenues
Revenues	1,410	1,118	2,571	2,069
Expenses
Total expenses	7,819	6,752	13,329	14,082
Operating income (loss)
Total operating income	(6,409)	(5,634)	(10,758)	(12,013)
Income before income taxes	(12,505)	(10,946)	(14,686)	(22,942)
Income taxes	(3,419)	(2,607)	(4,462)	(6,021)
Net income attributable to Hawaiian Electric	(9,086)	(8,339)	(10,224)	(16,921)
Preferred stock dividends of subsidiaries	(26)	(26)	(52)	(52)
Net income for common stock	$ (9,060)	$ (8,313)	$ (10,172)	$ (16,869)