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v2.4.1.9

Long-term debt (Details) (USD $) | 12 Months Ended | 0 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | May 05, 2014 | May 02, 2014
Long-term debt |  |  |  |  |
Long-term debt | $ 1,506,546,000 us-gaap_LongTermDebt | $ 1,492,945,000 us-gaap_LongTermDebt |  |  |
Aggregate principal payments |  |  |  |  |
2015 | 0 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths |  |  |  |
2016 | 200,000,000 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo |  |  |  |
2017 | 0 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree |  |  |  |
2018 | 50,000,000 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour |  |  |  |
2019 | 0 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive |  |  |  |
Proceeds from issuance of long-term debt | 125,000,000 us-gaap_ProceedsFromIssuanceOfLongTermDebt | 286,000,000 us-gaap_ProceedsFromIssuanceOfLongTermDebt | 457,000,000 us-gaap_ProceedsFromIssuanceOfLongTermDebt |  |
Hawaiian Electric Company, Inc. and Subsidiaries |  |  |  |  |
Aggregate principal payments |  |  |  |  |
2015 | 0 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember |  |  |  |
2016 | 0 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember |  |  |  |
2017 | 0 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember |  |  |  |
2018 | 50,000,000 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember |  |  |  |
2019 | 0 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember |  |  |  |
Proceeds from issuance of long-term debt | 0 us-gaap_ProceedsFromIssuanceOfLongTermDebt / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 236,000,000 us-gaap_ProceedsFromIssuanceOfLongTermDebt / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 457,000,000 us-gaap_ProceedsFromIssuanceOfLongTermDebt / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember |  |
Special purpose revenue bonds issued on behalf of electric utility subsidiaries |  |  |  |  |
Long-term debt |  |  |  |  |
Long-term debt | 1,206,546,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = he_BondsIssuedOnBehalfOfElectricUtilitySubsidiariesMember | 1,217,945,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = he_BondsIssuedOnBehalfOfElectricUtilitySubsidiariesMember |  |  |
HEI term loan LIBOR plus .90% due 2016 |  |  |  |  |
Long-term debt |  |  |  |  |
Long-term debt | 125,000,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = he_TermLoanLIBORPlus.90PercentDue2016Member | 0 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = he_TermLoanLIBORPlus.90PercentDue2016Member |  |  |
HEI term loan LIBOR plus .90% due 2016 | LIBOR |  |  |  |  |
Long-term debt |  |  |  |  |
Line of credit facility basis point spread (as a percent) | 0.90%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = he_TermLoanLIBORPlus.90PercentDue2016Member / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |
HEI medium-term note 6.51%, due 2014 |  |  |  |  |
Long-term debt |  |  |  |  |
Long-term debt | 0 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = he_MediumTermNotes6.51PercentDue2014Member | 100,000,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = he_MediumTermNotes6.51PercentDue2014Member |  |  |
Debt instrument, stated interest rate (as a percent) | 6.51%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = he_MediumTermNotes6.51PercentDue2014Member | 6.51%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = he_MediumTermNotes6.51PercentDue2014Member |  |  |
HEI medium-term note 6.51%, due 2014 | Medium-term note |  |  |  |  |
Long-term debt |  |  |  |  |
Debt instrument, stated interest rate (as a percent) |  |  |  | 6.51%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = us-gaap_MediumTermNotesMember / us-gaap_LongtermDebtTypeAxis = he_MediumTermNotes6.51PercentDue2014Member |
Aggregate principal payments |  |  |  |  |
Refinancing of unsecured debt payable |  |  |  | 100,000,000 us-gaap_RepaymentsOfUnsecuredDebt / us-gaap_DebtInstrumentAxis = us-gaap_MediumTermNotesMember / us-gaap_LongtermDebtTypeAxis = he_MediumTermNotes6.51PercentDue2014Member |
HEI senior note 4.41%, due 2016 |  |  |  |  |
Long-term debt |  |  |  |  |
Long-term debt | 75,000,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = he_SeniorNotes4.41PercentDue2016Member | 75,000,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = he_SeniorNotes4.41PercentDue2016Member |  |  |
Debt instrument, stated interest rate (as a percent) | 4.41%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = he_SeniorNotes4.41PercentDue2016Member | 4.41%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = he_SeniorNotes4.41PercentDue2016Member |  |  |
HEI senior note 5.67%, due 2021 |  |  |  |  |
Long-term debt |  |  |  |  |
Long-term debt | 50,000,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = he_SeniorNotes5.67PercentDue2021Member | 50,000,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = he_SeniorNotes5.67PercentDue2021Member |  |  |
Debt instrument, stated interest rate (as a percent) | 5.67%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = he_SeniorNotes5.67PercentDue2021Member | 5.67%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = he_SeniorNotes5.67PercentDue2021Member |  |  |
HEI senior note 3.99%, due 2023 |  |  |  |  |
Long-term debt |  |  |  |  |
Long-term debt | 50,000,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = he_Series2013ASeniorNotes3.99PercentDue2023Member | 50,000,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = he_Series2013ASeniorNotes3.99PercentDue2023Member |  |  |
Debt instrument, stated interest rate (as a percent) | 3.99%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = he_Series2013ASeniorNotes3.99PercentDue2023Member | 3.99%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = he_Series2013ASeniorNotes3.99PercentDue2023Member |  |  |
Loans payable | Eurodollar term loan |  |  |  |  |
Aggregate principal payments |  |  |  |  |
Proceeds from issuance of long-term debt |  |  |  |  | $ 125,000,000 us-gaap_ProceedsFromIssuanceOfLongTermDebt / us-gaap_DebtInstrumentAxis = he_EurodollarTermLoanMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember
Term Of Loan |  |  |  |  | 2 years
Loans payable | Eurodollar term loan | Minimum |  |  |  |  |
Aggregate principal payments |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  | 1.12%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = he_EurodollarTermLoanMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Loans payable | Eurodollar term loan | Maximum |  |  |  |  |
Aggregate principal payments |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  | 1.14%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = he_EurodollarTermLoanMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LoansPayableMember / us-gaap_RangeAxis = us-gaap_MaximumMember

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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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