XML 74 R8.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Consolidated Statements of Capitalization (Parenthetical) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Common stock, authorized shares | 200,000,000 us-gaap_CommonStockSharesAuthorized | 200,000,000 us-gaap_CommonStockSharesAuthorized
Common stock, outstanding shares | 102,565,266 us-gaap_CommonStockSharesOutstanding | 101,259,800 us-gaap_CommonStockSharesOutstanding
Hawaiian Electric Company, Inc. and Subsidiaries |  |
Common stock, authorized shares | 50,000,000 us-gaap_CommonStockSharesAuthorized / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 50,000,000 us-gaap_CommonStockSharesAuthorized / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember
Common stock, outstanding shares | 15,805,327 us-gaap_CommonStockSharesOutstanding / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 15,429,105 us-gaap_CommonStockSharesOutstanding / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember
Common stock, par value (in dollars per share) | $ 6.667 us-gaap_CommonStockParOrStatedValuePerShare / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | $ 6.667 us-gaap_CommonStockParOrStatedValuePerShare / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember
Shares outstanding December 31, 2013 | 1,234,657 us-gaap_TemporaryEquitySharesOutstanding / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember | 1,234,657 us-gaap_TemporaryEquitySharesOutstanding / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember
Hawaiian Electric Company, Inc. and Subsidiaries | Series C, 4.25% Preferred Stock |  |
Preferred stock, par value (in dollars per share) | $ 20 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesC4.25PercentPreferredStockMember | $ 20 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesC4.25PercentPreferredStockMember
Preferred stock, dividend rate | 4.25%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesC4.25PercentPreferredStockMember | 4.25%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesC4.25PercentPreferredStockMember
Shares outstanding December 31, 2013 | 150,000 us-gaap_TemporaryEquitySharesOutstanding / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesC4.25PercentPreferredStockMember | 150,000 us-gaap_TemporaryEquitySharesOutstanding / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesC4.25PercentPreferredStockMember
Hawaiian Electric Company, Inc. and Subsidiaries | Series D, 5.00% Preferred Stock |  |
Preferred stock, par value (in dollars per share) | $ 20 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesD5PercentPreferredStockMember | $ 20 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesD5PercentPreferredStockMember
Preferred stock, dividend rate | 5.00%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesD5PercentPreferredStockMember | 5.00%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesD5PercentPreferredStockMember
Shares outstanding December 31, 2013 | 50,000 us-gaap_TemporaryEquitySharesOutstanding / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesD5PercentPreferredStockMember | 50,000 us-gaap_TemporaryEquitySharesOutstanding / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesD5PercentPreferredStockMember
Hawaiian Electric Company, Inc. and Subsidiaries | Series E, 5.00% Preferred Stock |  |
Preferred stock, par value (in dollars per share) | $ 20 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesE5PercentPreferredStockMember | $ 20 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesE5PercentPreferredStockMember
Preferred stock, dividend rate | 5.00%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesE5PercentPreferredStockMember | 5.00%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesE5PercentPreferredStockMember
Shares outstanding December 31, 2013 | 150,000 us-gaap_TemporaryEquitySharesOutstanding / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesE5PercentPreferredStockMember | 150,000 us-gaap_TemporaryEquitySharesOutstanding / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesE5PercentPreferredStockMember
Hawaiian Electric Company, Inc. and Subsidiaries | Series H, 5.25% Preferred Stock |  |
Preferred stock, par value (in dollars per share) | $ 20 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesH5.25PercentPreferredStockMember | $ 20 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesH5.25PercentPreferredStockMember
Preferred stock, dividend rate | 5.25%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesH5.25PercentPreferredStockMember | 5.25%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesH5.25PercentPreferredStockMember
Shares outstanding December 31, 2013 | 250,000 us-gaap_TemporaryEquitySharesOutstanding / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesH5.25PercentPreferredStockMember | 250,000 us-gaap_TemporaryEquitySharesOutstanding / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesH5.25PercentPreferredStockMember
Hawaiian Electric Company, Inc. and Subsidiaries | Series I, 5.00% Preferred Stock |  |
Preferred stock, par value (in dollars per share) | $ 20 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesI5PercentPreferredStockMember | $ 20 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesI5PercentPreferredStockMember
Preferred stock, dividend rate | 5.00%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesI5PercentPreferredStockMember | 5.00%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesI5PercentPreferredStockMember
Shares outstanding December 31, 2013 | 89,657 us-gaap_TemporaryEquitySharesOutstanding / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesI5PercentPreferredStockMember | 89,657 us-gaap_TemporaryEquitySharesOutstanding / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesI5PercentPreferredStockMember
Hawaiian Electric Company, Inc. and Subsidiaries | Series J, 4.75% Preferred Stock |  |
Preferred stock, par value (in dollars per share) | $ 20 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesJ4.75PercentPreferredStockMember | $ 20 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesJ4.75PercentPreferredStockMember
Preferred stock, dividend rate | 4.75%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesJ4.75PercentPreferredStockMember | 4.75%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesJ4.75PercentPreferredStockMember
Shares outstanding December 31, 2013 | 250,000 us-gaap_TemporaryEquitySharesOutstanding / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesJ4.75PercentPreferredStockMember | 250,000 us-gaap_TemporaryEquitySharesOutstanding / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesJ4.75PercentPreferredStockMember
Hawaiian Electric Company, Inc. and Subsidiaries | Series K, 4.65% Preferred Stock |  |
Preferred stock, par value (in dollars per share) | $ 20 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesK4.65PercentPreferredStockMember | $ 20 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesK4.65PercentPreferredStockMember
Preferred stock, dividend rate | 4.65%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesK4.65PercentPreferredStockMember | 4.65%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesK4.65PercentPreferredStockMember
Shares outstanding December 31, 2013 | 175,000 us-gaap_TemporaryEquitySharesOutstanding / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesK4.65PercentPreferredStockMember | 175,000 us-gaap_TemporaryEquitySharesOutstanding / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_SeriesK4.65PercentPreferredStockMember
Hawaiian Electric Company, Inc. and Subsidiaries | Preferred Stock $20 Par Value |  |
Preferred stock, par value (in dollars per share) | $ 20 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_PreferredStock20ParValueMember | $ 20 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_PreferredStock20ParValueMember
Preferred stock, Authorized shares | 5,000,000 us-gaap_TemporaryEquitySharesAuthorized / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_PreferredStock20ParValueMember | 5,000,000 us-gaap_TemporaryEquitySharesAuthorized / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_PreferredStock20ParValueMember
Hawaiian Electric Company, Inc. and Subsidiaries | Preferred Stock $100 Par Value |  |
Preferred stock, par value (in dollars per share) | $ 100 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_PreferredStock100ParValueMember | $ 100 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_PreferredStock100ParValueMember
Preferred stock, Authorized shares | 7,000,000 us-gaap_TemporaryEquitySharesAuthorized / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_PreferredStock100ParValueMember | 7,000,000 us-gaap_TemporaryEquitySharesAuthorized / dei_LegalEntityAxis = he_HawaiianElectricCompanyAndSubsidiariesMember / us-gaap_StatementClassOfStockAxis = he_PreferredStock100ParValueMember
Hawaiian Electric Company, Inc (HECO) | 6.50%, series 2009, due 2039 |  |
Debt instrument, stated interest rate (as a percent) | 6.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_Series2009Due2039Debt6.50PercentMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 6.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_Series2009Due2039Debt6.50PercentMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Hawaiian Electric Company, Inc (HECO) | 4.60%, refunding series 2007B, due 2026 |  |
Debt instrument, stated interest rate (as a percent) | 4.60%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_RefundingSeries2007BDue2026Debt4.60PercentMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 4.60%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_RefundingSeries2007BDue2026Debt4.60PercentMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Hawaiian Electric Company, Inc (HECO) | 4.65%, series 2007A, due 2037 |  |
Debt instrument, stated interest rate (as a percent) | 4.65%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_Series2007ADue2037Debt4.65PercentMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 4.65%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_Series2007ADue2037Debt4.65PercentMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Hawaiian Electric Company, Inc (HECO) | 4.80%, refunding series 2005A, due 2025 |  |
Debt instrument, stated interest rate (as a percent) | 4.80%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_RefundingSeries2005ADue2025Debt4.80PercentMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 4.80%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_RefundingSeries2005ADue2025Debt4.80PercentMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Hawaiian Electric Company, Inc (HECO) | Hawaiian Electric, 4.45%, Series 2013A, due 2022 |  |
Debt instrument, stated interest rate (as a percent) | 4.45%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_HawaiianElectricSeniorNotesDueDecember20224.45Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 4.45%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_HawaiianElectricSeniorNotesDueDecember20224.45Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Hawaiian Electric Company, Inc (HECO) | Hawaiian Electric, 4.84%, Series 2013B, due 2027 |  |
Debt instrument, stated interest rate (as a percent) | 4.84%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_HawaiianElectricSeniorNotesDueOctober20274.84Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 4.84%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_HawaiianElectricSeniorNotesDueOctober20274.84Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Hawaiian Electric Company, Inc (HECO) | Hawaiian Electric, 5.65%, Series 2013C, due 2043 |  |
Debt instrument, stated interest rate (as a percent) | 5.65%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_HawaiianElectricSeniorNotesDueOctober20435.65Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 5.65%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_HawaiianElectricSeniorNotesDueOctober20435.65Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Hawaiian Electric Company, Inc (HECO) | Senior notes 3.79%, Series 2012A, due 2018 |  |
Debt instrument, stated interest rate (as a percent) | 3.79%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes3.79PercentDue2018Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 3.79%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes3.79PercentDue2018Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Hawaiian Electric Company, Inc (HECO) | Senior notes 4.03%, Series 2012B, due 2020 |  |
Debt instrument, stated interest rate (as a percent) | 4.03%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes4.03PercentDue2020Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 4.03%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes4.03PercentDue2020Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Hawaiian Electric Company, Inc (HECO) | Senior notes 4.55%, due 2023 |  |
Debt instrument, stated interest rate (as a percent) | 4.55%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes4.55PercentDue2023Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 4.55%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes4.55PercentDue2023Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Hawaiian Electric Company, Inc (HECO) | Senior notes 4.72%, Series 2012D, due 2029 |  |
Debt instrument, stated interest rate (as a percent) | 4.72%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes4.72PercentDue2029Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 4.72%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes4.72PercentDue2029Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Hawaiian Electric Company, Inc (HECO) | Senior notes 5.39%, Series, 2012E, due 2042 |  |
Debt instrument, stated interest rate (as a percent) | 5.39%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes5.39PercentDue2042Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 5.39%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes5.39PercentDue2042Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Hawaiian Electric Company, Inc (HECO) | Senior notes 4.53%, Series, 2012F, due 2032 |  |
Debt instrument, stated interest rate (as a percent) | 4.53%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes4.53PercentDue2032Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 4.53%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes4.53PercentDue2032Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Hawaiian Electric Company, Inc (HECO) | 6.50% Junior subordinated deferrable interest debentures, series 2004, due 2034 |  |
Debt instrument, stated interest rate (as a percent) | 6.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_Series2004JuniorSubordinated6.50PercentDeferrableInterestDebenturesSeriesDue2034Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 6.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_Series2004JuniorSubordinated6.50PercentDeferrableInterestDebenturesSeriesDue2034Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Hawaii Electric Light Company, Inc. (HELCO) | Series G, 7.625% Preferred Stock |  |
Preferred stock, par value (in dollars per share) | $ 100 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_SubsidiariesTwoMember / us-gaap_StatementClassOfStockAxis = he_SeriesG7.625PercentPreferredStockMember | $ 100 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_SubsidiariesTwoMember / us-gaap_StatementClassOfStockAxis = he_SeriesG7.625PercentPreferredStockMember
Preferred stock, dividend rate | 7.625%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = he_SubsidiariesTwoMember / us-gaap_StatementClassOfStockAxis = he_SeriesG7.625PercentPreferredStockMember | 7.625%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = he_SubsidiariesTwoMember / us-gaap_StatementClassOfStockAxis = he_SeriesG7.625PercentPreferredStockMember
Shares outstanding December 31, 2013 | 70,000 us-gaap_TemporaryEquitySharesOutstanding / dei_LegalEntityAxis = he_SubsidiariesTwoMember / us-gaap_StatementClassOfStockAxis = he_SeriesG7.625PercentPreferredStockMember | 70,000 us-gaap_TemporaryEquitySharesOutstanding / dei_LegalEntityAxis = he_SubsidiariesTwoMember / us-gaap_StatementClassOfStockAxis = he_SeriesG7.625PercentPreferredStockMember
Hawaii Electric Light Company, Inc. (HELCO) | 6.50%, series 2009, due 2039 |  |
Debt instrument, stated interest rate (as a percent) | 6.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_Series2009Due2039Debt6.50PercentMember / dei_LegalEntityAxis = he_SubsidiariesTwoMember | 6.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_Series2009Due2039Debt6.50PercentMember / dei_LegalEntityAxis = he_SubsidiariesTwoMember
Hawaii Electric Light Company, Inc. (HELCO) | 4.60%, refunding series 2007B, due 2026 |  |
Debt instrument, stated interest rate (as a percent) | 4.60%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_RefundingSeries2007BDue2026Debt4.60PercentMember / dei_LegalEntityAxis = he_SubsidiariesTwoMember | 4.60%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_RefundingSeries2007BDue2026Debt4.60PercentMember / dei_LegalEntityAxis = he_SubsidiariesTwoMember
Hawaii Electric Light Company, Inc. (HELCO) | 4.65%, series 2007A, due 2037 |  |
Debt instrument, stated interest rate (as a percent) | 4.65%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_Series2007ADue2037Debt4.65PercentMember / dei_LegalEntityAxis = he_SubsidiariesTwoMember | 4.65%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_Series2007ADue2037Debt4.65PercentMember / dei_LegalEntityAxis = he_SubsidiariesTwoMember
Hawaii Electric Light Company, Inc. (HELCO) | 4.80%, refunding series 2005A, due 2025 |  |
Debt instrument, stated interest rate (as a percent) | 4.80%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_RefundingSeries2005ADue2025Debt4.80PercentMember / dei_LegalEntityAxis = he_SubsidiariesTwoMember | 4.80%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_RefundingSeries2005ADue2025Debt4.80PercentMember / dei_LegalEntityAxis = he_SubsidiariesTwoMember
Hawaii Electric Light Company, Inc. (HELCO) | 5.50%, refunding series 1999A, due 2014 |  |
Debt instrument, stated interest rate (as a percent) |  | 5.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_RefundingSeries1999ADue2014Debt5.50PercentMember / dei_LegalEntityAxis = he_SubsidiariesTwoMember
Hawaii Electric Light Company, Inc. (HELCO) | Hawaii Electric Light, 3.83%, Series 2013A, due 2020 |  |
Debt instrument, stated interest rate (as a percent) | 3.83%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_HawaiianElectricLightSeniorNotesDueJuly20203.83Member / dei_LegalEntityAxis = he_SubsidiariesTwoMember | 3.83%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_HawaiianElectricLightSeniorNotesDueJuly20203.83Member / dei_LegalEntityAxis = he_SubsidiariesTwoMember
Hawaii Electric Light Company, Inc. (HELCO) | Hawaii Electric Light, 4.45%, Series 2013B, due 2022 |  |
Debt instrument, stated interest rate (as a percent) | 4.45%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_HawaiianElectricLightSeniorNotesDueDecember20224.45Member / dei_LegalEntityAxis = he_SubsidiariesTwoMember | 4.45%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_HawaiianElectricLightSeniorNotesDueDecember20224.45Member / dei_LegalEntityAxis = he_SubsidiariesTwoMember
Hawaii Electric Light Company, Inc. (HELCO) | Hawaii Electric Light, 4.84%, Series 2013C, due 2027 |  |
Debt instrument, stated interest rate (as a percent) | 4.84%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_HawaiianElectricLightSeniorNotesDueOctober20274.84Member / dei_LegalEntityAxis = he_SubsidiariesTwoMember | 4.84%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_HawaiianElectricLightSeniorNotesDueOctober20274.84Member / dei_LegalEntityAxis = he_SubsidiariesTwoMember
Hawaii Electric Light Company, Inc. (HELCO) | Senior notes 3.79%, Series 2012A, due 2018 |  |
Debt instrument, stated interest rate (as a percent) | 3.79%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes3.79PercentDue2018Member / dei_LegalEntityAxis = he_SubsidiariesTwoMember | 3.79%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes3.79PercentDue2018Member / dei_LegalEntityAxis = he_SubsidiariesTwoMember
Hawaii Electric Light Company, Inc. (HELCO) | Senior notes 4.55%, due 2023 |  |
Debt instrument, stated interest rate (as a percent) | 4.55%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes4.55PercentDue2023Member / dei_LegalEntityAxis = he_SubsidiariesTwoMember | 4.55%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes4.55PercentDue2023Member / dei_LegalEntityAxis = he_SubsidiariesTwoMember
Maui Electric Company, Limited (MECO) | Series H, 7.625% Preferred Stock |  |
Preferred stock, par value (in dollars per share) | $ 100 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_SubsidiariesThreeMember / us-gaap_StatementClassOfStockAxis = he_SeriesH7.625PercentPreferredStockMember | $ 100 us-gaap_TemporaryEquityParOrStatedValuePerShare / dei_LegalEntityAxis = he_SubsidiariesThreeMember / us-gaap_StatementClassOfStockAxis = he_SeriesH7.625PercentPreferredStockMember
Preferred stock, dividend rate | 7.625%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = he_SubsidiariesThreeMember / us-gaap_StatementClassOfStockAxis = he_SeriesH7.625PercentPreferredStockMember | 7.625%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = he_SubsidiariesThreeMember / us-gaap_StatementClassOfStockAxis = he_SeriesH7.625PercentPreferredStockMember
Shares outstanding December 31, 2013 | 50,000 us-gaap_TemporaryEquitySharesOutstanding / dei_LegalEntityAxis = he_SubsidiariesThreeMember / us-gaap_StatementClassOfStockAxis = he_SeriesH7.625PercentPreferredStockMember | 50,000 us-gaap_TemporaryEquitySharesOutstanding / dei_LegalEntityAxis = he_SubsidiariesThreeMember / us-gaap_StatementClassOfStockAxis = he_SeriesH7.625PercentPreferredStockMember
Maui Electric Company, Limited (MECO) | 4.60%, refunding series 2007B, due 2026 |  |
Debt instrument, stated interest rate (as a percent) | 4.60%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_RefundingSeries2007BDue2026Debt4.60PercentMember / dei_LegalEntityAxis = he_SubsidiariesThreeMember | 4.60%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_RefundingSeries2007BDue2026Debt4.60PercentMember / dei_LegalEntityAxis = he_SubsidiariesThreeMember
Maui Electric Company, Limited (MECO) | 4.65%, series 2007A, due 2037 |  |
Debt instrument, stated interest rate (as a percent) | 4.65%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_Series2007ADue2037Debt4.65PercentMember / dei_LegalEntityAxis = he_SubsidiariesThreeMember | 4.65%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_Series2007ADue2037Debt4.65PercentMember / dei_LegalEntityAxis = he_SubsidiariesThreeMember
Maui Electric Company, Limited (MECO) | 4.80%, refunding series 2005A, due 2025 |  |
Debt instrument, stated interest rate (as a percent) | 4.80%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_RefundingSeries2005ADue2025Debt4.80PercentMember / dei_LegalEntityAxis = he_SubsidiariesThreeMember | 4.80%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_RefundingSeries2005ADue2025Debt4.80PercentMember / dei_LegalEntityAxis = he_SubsidiariesThreeMember
Maui Electric Company, Limited (MECO) | Maui Electric, 4.84%, Series 2013A, due 2027 |  |
Debt instrument, stated interest rate (as a percent) | 4.84%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_MauiElectricSeniorNotesDueOctober20274.84Member / dei_LegalEntityAxis = he_SubsidiariesThreeMember | 4.84%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_MauiElectricSeniorNotesDueOctober20274.84Member / dei_LegalEntityAxis = he_SubsidiariesThreeMember
Maui Electric Company, Limited (MECO) | Maui Electric, 5.65%, Series 2013B, due 2043 |  |
Debt instrument, stated interest rate (as a percent) | 5.65%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_MauiElectricSeniorNotesDueOctober20435.65Member / dei_LegalEntityAxis = he_SubsidiariesThreeMember | 5.65%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_MauiElectricSeniorNotesDueOctober20435.65Member / dei_LegalEntityAxis = he_SubsidiariesThreeMember
Maui Electric Company, Limited (MECO) | Senior notes 3.79%, Series 2012A, due 2018 |  |
Debt instrument, stated interest rate (as a percent) | 3.79%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes3.79PercentDue2018Member / dei_LegalEntityAxis = he_SubsidiariesThreeMember | 3.79%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes3.79PercentDue2018Member / dei_LegalEntityAxis = he_SubsidiariesThreeMember
Maui Electric Company, Limited (MECO) | Senior notes 4.03%, Series 2012B, due 2020 |  |
Debt instrument, stated interest rate (as a percent) | 4.03%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes4.03PercentDue2020Member / dei_LegalEntityAxis = he_SubsidiariesThreeMember | 4.03%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes4.03PercentDue2020Member / dei_LegalEntityAxis = he_SubsidiariesThreeMember
Maui Electric Company, Limited (MECO) | Senior notes 4.55%, due 2023 |  |
Debt instrument, stated interest rate (as a percent) | 4.55%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes4.55PercentDue2023Member / dei_LegalEntityAxis = he_SubsidiariesThreeMember | 4.55%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = he_SeniorNotes4.55PercentDue2023Member / dei_LegalEntityAxis = he_SubsidiariesThreeMember

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