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Retirement benefits (Tables)

9 Months Ended

Sep. 30, 2024

Retirement Benefits [Abstract]

Schedule of Components of Net Periodic Benefit Cost for Consolidated HEI

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

						Three months ended September 30																								Nine months ended September 30
						Pension benefits												Other benefits												Pension benefits												Other benefits
(in thousands)						2024						2023						2024						2023						2024						2023						2024						2023
HEI consolidated
Service cost						$	12,061					$	11,418					$	270					$	385					$	34,590					$	34,210					$	833					$	1,072
Interest cost						26,542						26,022						1,808						2,075						79,554						77,265						5,542						6,389
Expected return on plan assets						(35,993)						(35,238)						(3,490)						(3,426)						(107,957)						(105,630)						(10,462)						(10,236)
Amortization of net prior period gain						—						—						—						(218)						—						—						—						(656)
Amortization of net actuarial (gain)/losses						188						138						(763)						(518)						410						515						(2,188)						(1,416)
Net periodic pension/benefit cost (return)						2,798						2,340						(2,175)						(1,702)						6,597						6,360						(6,275)						(4,847)
Impact of PUC D&Os						17,406						17,663						2,052						1,536						53,585						53,929						5,827						4,385
Net periodic pension/benefit cost (return) (adjusted for impact of PUC D&Os)						$	20,204					$	20,003					$	(123)					$	(166)					$	60,182					$	60,289					$	(448)					$	(462)
Hawaiian Electric consolidated
Service cost						$	11,670					$	11,071					$	266					$	380					$	33,502					$	33,108					$	822					$	1,060
Interest cost						24,615						24,116						1,721						1,981						73,869						71,513						5,279						6,107
Expected return on plan assets						(33,769)						(33,029)						(3,438)						(3,374)						(101,321)						(98,972)						(10,306)						(10,081)
Amortization of net prior period gain						—						—						—						(218)						—						—						—						(654)
Amortization of net actuarial (gain)/losses						51						(16)						(742)						(503)						74						21						(2,130)						(1,370)
Net periodic pension/benefit cost (return)						2,567						2,142						(2,193)						(1,734)						6,124						5,670						(6,335)						(4,938)
Impact of PUC D&Os						17,406						17,663						2,052						1,536						53,585						53,929						5,827						4,385
Net periodic pension/benefit cost (return) (adjusted for impact of PUC D&Os)						$	19,973					$	19,805					$	(141)					$	(198)					$	59,709					$	59,599					$	(508)					$	(553)

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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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