Consolidated Statements of Capitalization (USD $)	Dec. 31, 2014	Dec. 31, 2013
Common stock equity
Retained earnings	$ 297,509,000	$ 255,694,000
Accumulated other comprehensive income (loss), net of taxes - retirement benefit plans	(27,551,000)	(12,562,000)
Total shareholders' equity	1,791,428,000us-gaap_StockholdersEquity	1,727,070,000us-gaap_StockholdersEquity
Preferred stock of subsidiaries - not subject to mandatory redemption	34,293,000	34,293,000
Hawaiian Electric Company, Inc. and Subsidiaries
Common stock equity
Common stock of $6 2/3 par value, Authorized: 50,000,000 shares. Outstanding: 2014, 15,805,327 shares and 2013, 15,429,105 shares	105,388,000	102,880,000
Additional paid in capital	578,938,000	541,452,000
Retained earnings	997,773,000	948,624,000
Accumulated other comprehensive income (loss), net of taxes - retirement benefit plans	45,000	608,000
Total shareholders' equity	1,682,144,000	1,593,564,000
Shares outstanding December 31, 2013	1,234,657	1,234,657
Preferred stock of subsidiaries - not subject to mandatory redemption	34,293,000	34,293,000
Obligations to the State of Hawaii for the repayment of Special Purpose Revenue Bonds (subsidiary obligations unconditionally guaranteed by Hawaiian Electric):
Secured long-term debt	462,000,000	473,400,000
Other long-term debt – unsecured:
Other long-term debt - unsecured	744,546,000	744,546,000
Total long-term debt	1,206,546,000	1,217,946,000
Less unamortized discount	0	1,000
Current portion of long-term debt	0	11,400,000
Long-term debt, net	1,206,546,000	1,206,545,000
Total capitalization	2,922,983,000	2,834,402,000
Hawaiian Electric Company, Inc. and Subsidiaries \| Series C, 4.25% Preferred Stock
Common stock equity
Preferred Stock, Par Value (in dollars per share)	$ 20	$ 20
Shares outstanding December 31, 2013	150,000	150,000
Preferred stock of subsidiaries - not subject to mandatory redemption	3,000,000	3,000,000
Hawaiian Electric Company, Inc. and Subsidiaries \| Series D, 5.00% Preferred Stock
Common stock equity
Preferred Stock, Par Value (in dollars per share)	$ 20	$ 20
Shares outstanding December 31, 2013	50,000	50,000
Preferred stock of subsidiaries - not subject to mandatory redemption	1,000,000	1,000,000
Hawaiian Electric Company, Inc. and Subsidiaries \| Series E, 5.00% Preferred Stock
Common stock equity
Preferred Stock, Par Value (in dollars per share)	$ 20	$ 20
Shares outstanding December 31, 2013	150,000	150,000
Preferred stock of subsidiaries - not subject to mandatory redemption	3,000,000	3,000,000
Hawaiian Electric Company, Inc. and Subsidiaries \| Series H, 5.25% Preferred Stock
Common stock equity
Preferred Stock, Par Value (in dollars per share)	$ 20	$ 20
Shares outstanding December 31, 2013	250,000	250,000
Preferred stock of subsidiaries - not subject to mandatory redemption	5,000,000	5,000,000
Hawaiian Electric Company, Inc. and Subsidiaries \| Series I, 5.00% Preferred Stock
Common stock equity
Preferred Stock, Par Value (in dollars per share)	$ 20	$ 20
Shares outstanding December 31, 2013	89,657	89,657
Preferred stock of subsidiaries - not subject to mandatory redemption	1,793,000	1,793,000
Hawaiian Electric Company, Inc. and Subsidiaries \| Series J, 4.75% Preferred Stock
Common stock equity
Preferred Stock, Par Value (in dollars per share)	$ 20	$ 20
Shares outstanding December 31, 2013	250,000	250,000
Preferred stock of subsidiaries - not subject to mandatory redemption	5,000,000	5,000,000
Hawaiian Electric Company, Inc. and Subsidiaries \| Series K, 4.65% Preferred Stock
Common stock equity
Preferred Stock, Par Value (in dollars per share)	$ 20	$ 20
Shares outstanding December 31, 2013	175,000	175,000
Preferred stock of subsidiaries - not subject to mandatory redemption	3,500,000	3,500,000
Hawaiian Electric Company, Inc. and Subsidiaries \| Senior notes
Other long-term debt – unsecured:
Other long-term debt - unsecured	693,000,000	693,000,000
Hawaiian Electric Company, Inc (HECO)
Common stock equity
Total shareholders' equity	1,682,144,000	1,593,564,000
Other long-term debt – unsecured:
Current portion of long-term debt	0
Long-term debt, net	830,546,000	830,547,000
Total capitalization	2,534,983,000	2,446,404,000
Hawaiian Electric Company, Inc (HECO) \| 6.50%, series 2009, due 2039
Debt instrument, stated interest rate (as a percent)	6.50%	6.50%
Obligations to the State of Hawaii for the repayment of Special Purpose Revenue Bonds (subsidiary obligations unconditionally guaranteed by Hawaiian Electric):
Secured long-term debt	90,000,000	90,000,000
Hawaiian Electric Company, Inc (HECO) \| 4.60%, refunding series 2007B, due 2026
Debt instrument, stated interest rate (as a percent)	4.60%	4.60%
Obligations to the State of Hawaii for the repayment of Special Purpose Revenue Bonds (subsidiary obligations unconditionally guaranteed by Hawaiian Electric):
Secured long-term debt	62,000,000	62,000,000
Hawaiian Electric Company, Inc (HECO) \| 4.65%, series 2007A, due 2037
Debt instrument, stated interest rate (as a percent)	4.65%	4.65%
Obligations to the State of Hawaii for the repayment of Special Purpose Revenue Bonds (subsidiary obligations unconditionally guaranteed by Hawaiian Electric):
Secured long-term debt	100,000,000	100,000,000
Hawaiian Electric Company, Inc (HECO) \| 4.80%, refunding series 2005A, due 2025
Debt instrument, stated interest rate (as a percent)	4.80%	4.80%
Obligations to the State of Hawaii for the repayment of Special Purpose Revenue Bonds (subsidiary obligations unconditionally guaranteed by Hawaiian Electric):
Secured long-term debt	40,000,000	40,000,000
Hawaiian Electric Company, Inc (HECO) \| Hawaiian Electric, 4.45%, Series 2013A, due 2022
Debt instrument, stated interest rate (as a percent)	4.45%	4.45%
Other long-term debt – unsecured:
Other long-term debt - unsecured	40,000,000	40,000,000
Hawaiian Electric Company, Inc (HECO) \| Hawaiian Electric, 4.84%, Series 2013B, due 2027
Debt instrument, stated interest rate (as a percent)	4.84%	4.84%
Other long-term debt – unsecured:
Other long-term debt - unsecured	50,000,000	50,000,000
Hawaiian Electric Company, Inc (HECO) \| Hawaiian Electric, 5.65%, Series 2013C, due 2043
Debt instrument, stated interest rate (as a percent)	5.65%	5.65%
Other long-term debt – unsecured:
Other long-term debt - unsecured	50,000,000	50,000,000
Hawaiian Electric Company, Inc (HECO) \| Senior notes 3.79%, Series 2012A, due 2018
Debt instrument, stated interest rate (as a percent)	3.79%	3.79%
Other long-term debt – unsecured:
Other long-term debt - unsecured	30,000,000	30,000,000
Hawaiian Electric Company, Inc (HECO) \| Senior notes 4.03%, Series 2012B, due 2020
Debt instrument, stated interest rate (as a percent)	4.03%	4.03%
Other long-term debt – unsecured:
Other long-term debt - unsecured	62,000,000	62,000,000
Hawaiian Electric Company, Inc (HECO) \| Senior notes 4.55%, due 2023
Debt instrument, stated interest rate (as a percent)	4.55%	4.55%
Other long-term debt – unsecured:
Other long-term debt - unsecured	50,000,000	50,000,000
Hawaiian Electric Company, Inc (HECO) \| Senior notes 4.72%, Series 2012D, due 2029
Debt instrument, stated interest rate (as a percent)	4.72%	4.72%
Other long-term debt – unsecured:
Other long-term debt - unsecured	35,000,000	35,000,000
Hawaiian Electric Company, Inc (HECO) \| Senior notes 5.39%, Series, 2012E, due 2042
Debt instrument, stated interest rate (as a percent)	5.39%	5.39%
Other long-term debt – unsecured:
Other long-term debt - unsecured	150,000,000	150,000,000
Hawaiian Electric Company, Inc (HECO) \| Senior notes 4.53%, Series, 2012F, due 2032
Debt instrument, stated interest rate (as a percent)	4.53%	4.53%
Other long-term debt – unsecured:
Other long-term debt - unsecured	40,000,000	40,000,000
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%	6.50%
Other long-term debt – unsecured:
Other long-term debt - unsecured	51,546,000	51,546,000
Hawaii Electric Light Company, Inc. (HELCO)
Common stock equity
Total shareholders' equity	281,846,000	274,802,000
Other long-term debt – unsecured:
Current portion of long-term debt	0	11,400,000
Long-term debt, net	190,000,000	189,998,000
Total capitalization	478,846,000	471,800,000
Hawaii Electric Light Company, Inc. (HELCO) \| Series G, 7.625% Preferred Stock
Common stock equity
Preferred Stock, Par Value (in dollars per share)	$ 100	$ 100
Shares outstanding December 31, 2013	70,000	70,000
Preferred stock of subsidiaries - not subject to mandatory redemption	7,000,000	7,000,000
Hawaii Electric Light Company, Inc. (HELCO) \| 6.50%, series 2009, due 2039
Debt instrument, stated interest rate (as a percent)	6.50%	6.50%
Obligations to the State of Hawaii for the repayment of Special Purpose Revenue Bonds (subsidiary obligations unconditionally guaranteed by Hawaiian Electric):
Secured long-term debt	60,000,000	60,000,000
Hawaii Electric Light Company, Inc. (HELCO) \| 4.60%, refunding series 2007B, due 2026
Debt instrument, stated interest rate (as a percent)	4.60%	4.60%
Obligations to the State of Hawaii for the repayment of Special Purpose Revenue Bonds (subsidiary obligations unconditionally guaranteed by Hawaiian Electric):
Secured long-term debt	8,000,000	8,000,000
Hawaii Electric Light Company, Inc. (HELCO) \| 4.65%, series 2007A, due 2037
Debt instrument, stated interest rate (as a percent)	4.65%	4.65%
Obligations to the State of Hawaii for the repayment of Special Purpose Revenue Bonds (subsidiary obligations unconditionally guaranteed by Hawaiian Electric):
Secured long-term debt	20,000,000	20,000,000
Hawaii Electric Light Company, Inc. (HELCO) \| 4.80%, refunding series 2005A, due 2025
Debt instrument, stated interest rate (as a percent)	4.80%	4.80%
Obligations to the State of Hawaii for the repayment of Special Purpose Revenue Bonds (subsidiary obligations unconditionally guaranteed by Hawaiian Electric):
Secured long-term debt	5,000,000	5,000,000
Hawaii Electric Light Company, Inc. (HELCO) \| 5.50%, refunding series 1999A, due 2014
Debt instrument, stated interest rate (as a percent)		5.50%
Obligations to the State of Hawaii for the repayment of Special Purpose Revenue Bonds (subsidiary obligations unconditionally guaranteed by Hawaiian Electric):
Secured long-term debt	0	11,400,000
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%	3.83%
Other long-term debt – unsecured:
Other long-term debt - unsecured	14,000,000	14,000,000
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%	4.45%
Other long-term debt – unsecured:
Other long-term debt - unsecured	12,000,000	12,000,000
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%	4.84%
Other long-term debt – unsecured:
Other long-term debt - unsecured	30,000,000	30,000,000
Hawaii Electric Light Company, Inc. (HELCO) \| Senior notes 3.79%, Series 2012A, due 2018
Debt instrument, stated interest rate (as a percent)	3.79%	3.79%
Other long-term debt – unsecured:
Other long-term debt - unsecured	11,000,000	11,000,000
Hawaii Electric Light Company, Inc. (HELCO) \| Senior notes 4.55%, due 2023
Debt instrument, stated interest rate (as a percent)	4.55%	4.55%
Other long-term debt – unsecured:
Other long-term debt - unsecured	20,000,000	20,000,000
Maui Electric Company, Limited (MECO)
Common stock equity
Total shareholders' equity	256,692,000	248,771,000
Other long-term debt – unsecured:
Current portion of long-term debt	0
Long-term debt, net	186,000,000	186,000,000
Total capitalization	447,692,000	439,771,000
Maui Electric Company, Limited (MECO) \| Series H, 7.625% Preferred Stock
Common stock equity
Preferred Stock, Par Value (in dollars per share)	$ 100	$ 100
Shares outstanding December 31, 2013	50,000	50,000
Preferred stock of subsidiaries - not subject to mandatory redemption	5,000,000	5,000,000
Maui Electric Company, Limited (MECO) \| 4.60%, refunding series 2007B, due 2026
Debt instrument, stated interest rate (as a percent)	4.60%	4.60%
Obligations to the State of Hawaii for the repayment of Special Purpose Revenue Bonds (subsidiary obligations unconditionally guaranteed by Hawaiian Electric):
Secured long-term debt	55,000,000	55,000,000
Maui Electric Company, Limited (MECO) \| 4.65%, series 2007A, due 2037
Debt instrument, stated interest rate (as a percent)	4.65%	4.65%
Obligations to the State of Hawaii for the repayment of Special Purpose Revenue Bonds (subsidiary obligations unconditionally guaranteed by Hawaiian Electric):
Secured long-term debt	20,000,000	20,000,000
Maui Electric Company, Limited (MECO) \| 4.80%, refunding series 2005A, due 2025
Debt instrument, stated interest rate (as a percent)	4.80%	4.80%
Obligations to the State of Hawaii for the repayment of Special Purpose Revenue Bonds (subsidiary obligations unconditionally guaranteed by Hawaiian Electric):
Secured long-term debt	2,000,000	2,000,000
Maui Electric Company, Limited (MECO) \| Maui Electric, 4.84%, Series 2013A, due 2027
Debt instrument, stated interest rate (as a percent)	4.84%	4.84%
Other long-term debt – unsecured:
Other long-term debt - unsecured	20,000,000	20,000,000
Maui Electric Company, Limited (MECO) \| Maui Electric, 5.65%, Series 2013B, due 2043
Debt instrument, stated interest rate (as a percent)	5.65%	5.65%
Other long-term debt – unsecured:
Other long-term debt - unsecured	20,000,000	20,000,000
Maui Electric Company, Limited (MECO) \| Senior notes 3.79%, Series 2012A, due 2018
Debt instrument, stated interest rate (as a percent)	3.79%	3.79%
Other long-term debt – unsecured:
Other long-term debt - unsecured	9,000,000	9,000,000
Maui Electric Company, Limited (MECO) \| Senior notes 4.03%, Series 2012B, due 2020
Debt instrument, stated interest rate (as a percent)	4.03%	4.03%
Other long-term debt – unsecured:
Other long-term debt - unsecured	20,000,000	20,000,000
Maui Electric Company, Limited (MECO) \| Senior notes 4.55%, due 2023
Debt instrument, stated interest rate (as a percent)	4.55%	4.55%
Other long-term debt – unsecured:
Other long-term debt - unsecured	$ 30,000,000	$ 30,000,000

The total of net (gain) loss, prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost. This amount is adjusted for regulatory rate making impacts.

No definition available.