Term Of Loan

No definition available.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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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

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-Number 210

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-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.22(a)(1))

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Subparagraph (SX 210.5-02.22(a)(1))

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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

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-Subparagraph (SX 210.5-02.22)

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-Name Accounting Standards Codification

-Topic 942

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-Section S99

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-Subparagraph (SX 210.9-03.16)

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Name Regulation S-X (SX)

-Number 210

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-Subparagraph (SX 210.7-03.16)

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+ 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

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-Topic 235

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-Section S99

-Paragraph 3

-Subparagraph (SX 210.12-04.(a))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690

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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

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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 fourth 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

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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 third 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

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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 second 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

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- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

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-Publisher FASB

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-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (b)

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- Definition

The cash outflow to repay long-term debt that is not secured by collateral. Excludes repayments of tax exempt unsecured debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

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-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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Long-term debt (Details) (USD $)	12 Months Ended			0 Months Ended
Long-term debt (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	May 05, 2014	May 02, 2014
Long-term debt
Long-term debt	$ 1,506,546,000us-gaap_LongTermDebt	$ 1,492,945,000us-gaap_LongTermDebt
Aggregate principal payments
2015	0
2016	200,000,000
2017	0
2018	50,000,000
2019	0
Proceeds from issuance of long-term debt	125,000,000	286,000,000	457,000,000
Hawaiian Electric Company, Inc. and Subsidiaries
Aggregate principal payments
2015	0
2016	0
2017	0
2018	50,000,000
2019	0
Proceeds from issuance of long-term debt	0	236,000,000	457,000,000
Special purpose revenue bonds issued on behalf of electric utility subsidiaries
Long-term debt
Long-term debt	1,206,546,000	1,217,945,000
HEI term loan LIBOR plus .90% due 2016
Long-term debt
Long-term debt	125,000,000	0
HEI term loan LIBOR plus .90% due 2016 \| LIBOR
Long-term debt
Line of credit facility basis point spread (as a percent)	0.90%
HEI medium-term note 6.51%, due 2014
Long-term debt
Long-term debt	0	100,000,000
Debt instrument, stated interest rate (as a percent)	6.51%	6.51%
HEI medium-term note 6.51%, due 2014 \| Medium-term note
Long-term debt
Debt instrument, stated interest rate (as a percent)				6.51%
Aggregate principal payments
Refinancing of unsecured debt payable				100,000,000
HEI senior note 4.41%, due 2016
Long-term debt
Long-term debt	75,000,000	75,000,000
Debt instrument, stated interest rate (as a percent)	4.41%	4.41%
HEI senior note 5.67%, due 2021
Long-term debt
Long-term debt	50,000,000	50,000,000
Debt instrument, stated interest rate (as a percent)	5.67%	5.67%
HEI senior note 3.99%, due 2023
Long-term debt
Long-term debt	50,000,000	50,000,000
Debt instrument, stated interest rate (as a percent)	3.99%	3.99%
Loans payable \| Eurodollar term loan
Aggregate principal payments
Proceeds from issuance of long-term debt					$ 125,000,000
Term Of Loan					2 years
Loans payable \| Eurodollar term loan \| Minimum
Aggregate principal payments
Debt Instrument, Interest Rate, Effective Percentage					1.12%
Loans payable \| Eurodollar term loan \| Maximum
Aggregate principal payments
Debt Instrument, Interest Rate, Effective Percentage					1.14%