Condensed Consolidated Statements of Comprehensive Income (unaudited) - HECO - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Net income (loss) for common stock	$ (1,295,484)	$ 42,122	$ 54,610	$ 54,721	$ (1,253,362)	$ 109,331
Retirement benefit plans:
Adjustment for amortization of prior service credit and net gains recognized during the period in net periodic benefit cost, net of taxes of $(175), $(163), $(351) and $(326), respectively	(445)		(357)		(894)	(714)
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes of $160, $148, $319 and $295, respectively	459		426		918	851
Other comprehensive loss, net of taxes	1,594	(9,801)	(7,609)	20,488	(8,207)	12,879
Comprehensive income (loss) attributable to Hawaiian Electric Industries, Inc.	(1,293,890)		47,001		(1,261,569)	122,210
Hawaiian Electric Company, Inc. and Subsidiaries
Net income (loss) for common stock	(1,229,394)	39,221	45,299	47,009	(1,190,173)	92,308
Retirement benefit plans:
Adjustment for amortization of prior service credit and net gains recognized during the period in net periodic benefit cost, net of taxes of $(175), $(163), $(351) and $(326), respectively	(505)		(470)		(1,013)	(940)
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes of $160, $148, $319 and $295, respectively	459		426		918	851
Other comprehensive loss, net of taxes	(46)	$ (49)	(44)	$ (45)	(95)	(89)
Comprehensive income (loss) attributable to Hawaiian Electric Industries, Inc.	$ (1,229,440)		$ 45,255		$ (1,190,268)	$ 92,219