Consolidated Statements of Comprehensive Income (Parenthetical) - HECO - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Retirement benefit plans:
Net gains arising during the period, taxes	$ 23,015	$ 3,778	$ 65,174
Amortization of net losses (gains), prior service gain and transition obligation included in net periodic benefit cost, tax benefits	(597)	(535)	6,820
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, (taxes) benefits	(22,096)	(2,846)	(69,345)
Hawaiian Electric Company, Inc. and Subsidiaries
Retirement benefit plans:
Net gains arising during the period, taxes	22,780	3,529	64,925
Amortization of net losses (gains), prior service gain and transition obligation included in net periodic benefit cost, tax benefits	(706)	(688)	6,550
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, (taxes) benefits	$ (22,096)	$ (2,846)	$ (69,345)