Condensed Consolidated Statements of Comprehensive Income (unaudited) - HECO - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Net income for common stock	$ 41,118	$ 54,610	$ 54,721	$ 62,082	$ 52,541	$ 69,167	$ 150,449	$ 183,790
Retirement benefit plans:
Adjustment for amortization of prior service credit and net losses (gains) recognized during the period in net periodic benefit cost, net of taxes of $(190), $1,877, $(516) and $3,393, respectively	(446)			5,606			(1,160)	10,229
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes of $163, $(1,839), $458 and $(3,320), respectively	470			(5,303)			1,321	(9,572)
Other comprehensive income (loss), net of taxes	(34,875)	(7,609)	20,488	(96,012)	(87,840)	(117,159)	(21,996)	(301,011)
Comprehensive income (loss) attributable to Hawaiian Electric Industries, Inc.	6,243			(33,930)			128,453	(117,221)
Hawaiian Electric Company, Inc. and Subsidiaries
Net income for common stock	43,461	45,299	47,009	49,764	44,135	46,409	135,769	140,308
Retirement benefit plans:
Adjustment for amortization of prior service credit and net losses (gains) recognized during the period in net periodic benefit cost, net of taxes of $(190), $1,877, $(516) and $3,393, respectively	(547)			5,411			(1,487)	9,782
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes of $163, $(1,839), $458 and $(3,320), respectively	470			(5,303)			1,321	(9,572)
Other comprehensive income (loss), net of taxes	(77)	$ (44)	$ (45)	108	$ 51	$ 51	(166)	210
Comprehensive income (loss) attributable to Hawaiian Electric Industries, Inc.	$ 43,384			$ 49,872			$ 135,603	$ 140,518