XML 21 R46.htm IDEA: XBRL DOCUMENT
v3.3.0.814

Electric utility subsidiary - Liquefied natural gas (Details) | May. 31, 2015 t
--- | ---
Electric utility subsidiary [Abstract] |
Liquefaction capacity purchases, year one | 700,000
Purchase agreement, period of first tranche | 5 years
Purchase agreement, period of second tranche | 5 years
Purchase agreement, period of third tranche | 10 years
Liquefaction capacity purchases, year two | 700,000
Liquefaction capacity purchases, year three | 700,000
Liquefaction capacity purchases, year four | 700,000
Liquefaction capacity purchases, year five | 700,000
Liquefaction capacity purchases, year six | 600,000
Liquefaction capacity purchases, year seven | 600,000
Liquefaction capacity purchases, year eight | 600,000
Liquefaction capacity purchases, year nine | 600,000
Liquefaction capacity purchases, year ten | 600,000
Liquefaction capacity purchases, year eleven | 500,000
Liquefaction capacity purchases, year twelve | 500,000
Liquefaction capacity purchases, year thirteen | 500,000
Liquefaction capacity purchases, year fourteen | 500,000
Liquefaction capacity purchases, year fifteen | 500,000
Purchase Agreement, Annual Capacity Purchases, Year Sixteen | 500,000
Purchase Agreement, Annual Capacity Purchases, Year Seventeen | 500,000
Purchase Agreement, Annual Capacity Purchases, Year Eighteen | 500,000
Purchase Agreement, Annual Capacity Purchases, Year Nineteen | 500,000
Purchase Agreement, Annual Capacity Purchases, Year Twenty | 500,000

X
- Definition Electric utility subsidiary [Abstract] + References No definition available. + Details
Name: | he_ElectricutilitysubsidiaryAbstract
Namespace Prefix: | he_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long-term Purchase Commitment, Period, Tranche One + References No definition available. + Details
Name: | he_LongtermPurchaseCommitmentPeriodTrancheOne
Namespace Prefix: | he_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long-term Purchase Commitment, Period, Tranche Three + References No definition available. + Details
Name: | he_LongtermPurchaseCommitmentPeriodTrancheThree
Namespace Prefix: | he_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long-term Purchase Commitment, Period, Tranche Two + References No definition available. + Details
Name: | he_LongtermPurchaseCommitmentPeriodTrancheTwo
Namespace Prefix: | he_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Purchase Agreement, Annual Capacity Purchases, Year Eight + References No definition available. + Details
Name: | he_PurchaseAgreementAnnualCapacityPurchasesYearEight
Namespace Prefix: | he_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase Agreement, Annual Capacity Purchases, Year Eighteen + References No definition available. + Details
Name: | he_PurchaseAgreementAnnualCapacityPurchasesYearEighteen
Namespace Prefix: | he_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase Agreement, Annual Capacity Purchases, Year Eleven + References No definition available. + Details
Name: | he_PurchaseAgreementAnnualCapacityPurchasesYearEleven
Namespace Prefix: | he_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase Agreement, Annual Capacity Purchases, Year Fifteen + References No definition available. + Details
Name: | he_PurchaseAgreementAnnualCapacityPurchasesYearFifteen
Namespace Prefix: | he_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase Agreement, Annual Capacity Purchases, Year Five + References No definition available. + Details
Name: | he_PurchaseAgreementAnnualCapacityPurchasesYearFive
Namespace Prefix: | he_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase Agreement, Annual Capacity Purchases, Year Four + References No definition available. + Details
Name: | he_PurchaseAgreementAnnualCapacityPurchasesYearFour
Namespace Prefix: | he_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase Agreement, Annual Capacity Purchases, Year Fourteen + References No definition available. + Details
Name: | he_PurchaseAgreementAnnualCapacityPurchasesYearFourteen
Namespace Prefix: | he_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase Agreement, Annual Capacity Purchases, Year Nine + References No definition available. + Details
Name: | he_PurchaseAgreementAnnualCapacityPurchasesYearNine
Namespace Prefix: | he_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase Agreement, Annual Capacity Purchases, Year Nineteen + References No definition available. + Details
Name: | he_PurchaseAgreementAnnualCapacityPurchasesYearNineteen
Namespace Prefix: | he_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase Agreement, Annual Capacity Purchases, Year One + References No definition available. + Details
Name: | he_PurchaseAgreementAnnualCapacityPurchasesYearOne
Namespace Prefix: | he_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase Agreement, Annual Capacity Purchases, Year Seven + References No definition available. + Details
Name: | he_PurchaseAgreementAnnualCapacityPurchasesYearSeven
Namespace Prefix: | he_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase Agreement, Annual Capacity Purchases, Year Seventeen + References No definition available. + Details
Name: | he_PurchaseAgreementAnnualCapacityPurchasesYearSeventeen
Namespace Prefix: | he_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase Agreement, Annual Capacity Purchases, Year Six + References No definition available. + Details
Name: | he_PurchaseAgreementAnnualCapacityPurchasesYearSix
Namespace Prefix: | he_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase Agreement, Annual Capacity Purchases, Year Sixteen + References No definition available. + Details
Name: | he_PurchaseAgreementAnnualCapacityPurchasesYearSixteen
Namespace Prefix: | he_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase Agreement, Annual Capacity Purchases, Year Ten + References No definition available. + Details
Name: | he_PurchaseAgreementAnnualCapacityPurchasesYearTen
Namespace Prefix: | he_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase Agreement, Annual Capacity Purchases, Year Thirteen + References No definition available. + Details
Name: | he_PurchaseAgreementAnnualCapacityPurchasesYearThirteen
Namespace Prefix: | he_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase Agreement, Annual Capacity Purchases, Year Three + References No definition available. + Details
Name: | he_PurchaseAgreementAnnualCapacityPurchasesYearThree
Namespace Prefix: | he_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase Agreement, Annual Capacity Purchases, Year Twelve + References No definition available. + Details
Name: | he_PurchaseAgreementAnnualCapacityPurchasesYearTwelve
Namespace Prefix: | he_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase Agreement, Annual Capacity Purchases, Year Twenty + References No definition available. + Details
Name: | he_PurchaseAgreementAnnualCapacityPurchasesYearTwenty
Namespace Prefix: | he_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase Agreement, Annual Capacity Purchases, Year Two + References No definition available. + Details
Name: | he_PurchaseAgreementAnnualCapacityPurchasesYearTwo
Namespace Prefix: | he_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | instant