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Consolidated Statements of Comprehensive Income (Parenthetical) - HECO (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Less: amortization of net loss, prior service gain and transition obligation included in net periodic benefit cost, tax benefits	$ (1,900)	$ (3,697)	$ (5,438)	$ (11,173)
Less: reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, taxes	1,619	3,284	4,858	9,852
Hawaiian Electric Company, Inc. and Subsidiaries
Less: amortization of net loss, prior service gain and transition obligation included in net periodic benefit cost, tax benefits	(1,626)	(3,295)	(4,878)	(9,885)
Less: reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, taxes	$ 1,619	$ 3,284	$ 4,858	$ 9,852

X

- Definition

The amount of income taxes on the reclassification adjustments on pension and post retirement benefits for the accounting impact of the decisions issued by the Public Utilities Commission.

+ References

No definition available.

+ Details

Name:	he_OtherComprehensiveIncomeReclassificationAdjustmentForImpactOfDecisionAndOrdersOfThePUCIncludedInRegulatoryAssetsTax
Namespace Prefix:	he_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Tax effect on adjustment out of other comprehensive income for actuarial gains or losses, prior service gains or losses, and net transition asset or obligation recognized as a component of net periodic benefit cost during the period.

+ References

No definition available.

+ Details

Name:	he_OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossPriorServiceGainLossAndReclassificationOfDefinedBenefitPlanNetTransitionAssetObligationRecognizedInNetPeriodicBenefitCostTax
Namespace Prefix:	he_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration