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Retirement benefits (Tables)

3 Months Ended

Mar. 31, 2025

Retirement Benefits [Abstract]

Schedule of Components of Net Periodic Benefit Cost for Consolidated HEI

The components of net periodic pension costs and net periodic benefit costs for HEI consolidated and Hawaiian Electric consolidated were as follows:

												Three months ended March 31
																		Pension benefits												Other benefits
(in thousands)																														2025						2024						2025						2024
HEI consolidated
Service cost																														$	9,948					$	11,176					$	248					$	281
Interest cost																														26,305						25,449						1,821						1,861
Expected return on plan assets																														(33,857)						(34,596)						(3,510)						(3,485)
Amortization of net actuarial (gain)/losses																														65						64						(746)						(708)
Net periodic pension/benefit cost (return)																														2,461						2,093						(2,187)						(2,051)
Impact of PUC D&Os																														17,799						18,090						2,025						1,888
Net periodic pension/benefit cost (return) (adjusted for impact of PUC D&Os)																														$	20,260					$	20,183					$	(162)					$	(163)
Hawaiian Electric consolidated
Service cost																														$	9,705					$	10,916					$	245					$	278
Interest cost																														25,429						24,627						1,741						1,779
Expected return on plan assets																														(33,049)						(33,777)						(3,462)						(3,434)
Amortization of net actuarial (gain)/losses																														23						12						(737)						(694)
Net periodic pension/benefit cost (return)																														2,108						1,778						(2,213)						(2,071)
Impact of PUC D&Os																														17,799						18,090						2,025						1,888
Net periodic pension/benefit cost (return) (adjusted for impact of PUC D&Os)																														$	19,907					$	19,868					$	(188)					$	(183)

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- References

No definition available.

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- Definition

Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 715
-SubTopic 20
-Subparagraph (h)
-Name Accounting Standards Codification
-Paragraph 1
-Section 50
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

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