Shareholders' equity (Tables)

3 Months Ended

Mar. 31, 2026

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

Changes in the balances of each component of accumulated other comprehensive income/(loss) (AOCI) were as follows:

	HEI consolidated						Hawaiian Electric consolidated
(in thousands)	Unrealized gains (losses) on derivatives		Retirement benefit plans		AOCI		AOCI-Retirement benefit plans
Balance, December 31, 2025	$	600	$	2,738	$	3,338	$	2,640
Current period other comprehensive loss	(52)		(22)		(74)		(47)
Balance, March 31, 2026	$	548	$	2,716	$	3,264	$	2,593
Balance, December 31, 2024	$	2,120	$	1,341	$	3,461	$	2,786
Current period other comprehensive loss	(438)		(22)		(460)		(47)
Balance, March 31, 2025	$	1,682	$	1,319	$	3,001	$	2,739

Schedule of Reclassification out of AOCI

Reclassifications out of AOCI were as follows:

	Amount reclassified from AOCI				Affected line item in the  Statements of Income / Balance Sheets
	Three months ended March 31
(in thousands)	2026		2025
HEI consolidated
Net realized gains on derivatives qualifying as cash flow hedges	$	(52)	$	(50)	Interest expense
Retirement benefit plans:
Amortization of net gains recognized during the period in net periodic benefit cost	(458)		(505)		See Note 8 for additional details
Impact of D&Os of the PUC included in regulatory accounts	436		483		See Note 8 for additional details
Total reclassifications	$	(74)	$	(72)
Hawaiian Electric consolidated
Retirement benefit plans:
Amortization of net gains recognized during the period in net periodic benefit cost	$	(483)	$	(530)	See Note 8 for additional details
Impact of D&Os of the PUC included in regulatory accounts	436		483		See Note 8 for additional details
Total reclassifications	$	(47)	$	(47)