Consolidated Statements of Comprehensive Income (Parenthetical) - HECO - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Retirement benefit plans:
Net gains (losses) arising during the period, taxes (benefits)	$ 65,174	$ 53,068	$ (20,907)
Amortization of net loss, prior service gain and transition obligation included in net periodic benefit cost, tax benefits	6,820	6,665	8,247
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, (taxes) benefits	69,345	59,429	(13,825)
Hawaiian Electric Company, Inc. and Subsidiaries
Retirement benefit plans:
Net gains (losses) arising during the period, taxes (benefits)	64,925	52,554	(21,868)
Amortization of net loss, prior service gain and transition obligation included in net periodic benefit cost, tax benefits	6,550	6,750	7,474
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, (taxes) benefits	$ (69,345)	$ (59,429)	$ 13,825