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Consolidated Statements of Capitalization - HECO - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Common stock equity
Retained earnings	$ 476,836,000	$ 438,972,000
Retirement benefit plans	(26,990,000)	(24,744,000)
Accumulated other comprehensive loss, net of tax benefits	(41,941,000)	(33,129,000)
Total shareholders’ equity	2,097,386,000	2,066,753,000
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	462,000,000
3.10%, Refunding series 2017A, due 2026
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	125,000,000	0
4.00%, Refunding series 2017B, due 2037
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	140,000,000	0
3.25%, Refunding series 2015, due 2025
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	47,000,000	47,000,000
6.50%, Series 2009, due 2039
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	150,000,000	150,000,000
4.65%, Series 2007A, paid in 2017
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	140,000,000
4.60%, Refunding series 2007B, paid in 2017
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	125,000,000
Hawaiian Electric Company, Inc. and Subsidiaries
Common stock equity
Common stock of $6 2/3 par value, Authorized: 50,000,000 shares. Outstanding: 16,142,216 shares and 16,019,785 shares at December 31, 2017 and 2016, respectively	107,634,000	106,818,000
Premium on capital stock	614,675,000	601,491,000
Retained earnings	1,124,193,000	1,091,800,000
Accumulated other comprehensive income (loss), net of taxes - Unrealized losses on derivatives	0	(454,000)
Retirement benefit plans	(1,219,000)	132,000
Accumulated other comprehensive loss, net of tax benefits	(1,219,000)	(322,000)
Total shareholders’ equity	$ 1,845,283,000	1,799,787,000
Shares outstanding December 31, 2017 and 2016	1,234,657
Preferred stock of subsidiaries - not subject to mandatory redemption	$ 34,293,000	34,293,000
Other long-term debt – unsecured:
Other long-term debt - unsecured	914,546,000	864,546,000
Total long-term debt	1,376,546,000	1,326,546,000
Less unamortized debt issuance costs	8,067,000	7,286,000
Less current portion long-term debt, net of unamortized debt issuance costs	49,963,000	0
Long-term debt, net	1,318,516,000	1,319,260,000
Total capitalization	3,198,092,000	3,153,340,000
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes
Other long-term debt – unsecured:
Other long-term debt - unsecured	863,000,000	813,000,000
Hawaiian Electric Company, Inc. and Subsidiaries | 4.31%, Series 2017A, due 2047
Other long-term debt – unsecured:
Other long-term debt - unsecured	50,000,000	0
Hawaiian Electric Company, Inc. and Subsidiaries | 5.23%, Series 2015A, due 2045
Other long-term debt – unsecured:
Other long-term debt - unsecured	80,000,000	80,000,000
Hawaiian Electric Company, Inc. and Subsidiaries | 4.45%, Series 2013A and 2013B, due 2022
Other long-term debt – unsecured:
Other long-term debt - unsecured	52,000,000	52,000,000
Hawaiian Electric Company, Inc. and Subsidiaries | 4.84%, Series 2013A, 2013B and 2013C, due 2027
Other long-term debt – unsecured:
Other long-term debt - unsecured	100,000,000	100,000,000
Hawaiian Electric Company, Inc. and Subsidiaries | 5.65%, Series 2013B and 2013C, due 2043
Other long-term debt – unsecured:
Other long-term debt - unsecured	70,000,000	70,000,000
Hawaiian Electric Company, Inc. and Subsidiaries | 3.79%, Series 2012A, due 2018
Other long-term debt – unsecured:
Other long-term debt - unsecured	50,000,000	50,000,000
Hawaiian Electric Company, Inc. and Subsidiaries | 4.03%, Series 2012B, due 2020
Other long-term debt – unsecured:
Other long-term debt - unsecured	82,000,000	82,000,000
Hawaiian Electric Company, Inc. and Subsidiaries | 4.55%, Series 2012B and 2012C, due 2023
Other long-term debt – unsecured:
Other long-term debt - unsecured	$ 100,000,000	$ 100,000,000
Hawaiian Electric Company, Inc. and Subsidiaries | Series C, 4.25% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding December 31, 2017 and 2016	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
Shares outstanding December 31, 2017 and 2016	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
Shares outstanding December 31, 2017 and 2016	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
Shares outstanding December 31, 2017 and 2016	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
Shares outstanding December 31, 2017 and 2016	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
Shares outstanding December 31, 2017 and 2016	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
Shares outstanding December 31, 2017 and 2016	175,000	175,000
Preferred stock of subsidiaries - not subject to mandatory redemption	$ 3,500,000	$ 3,500,000
Hawaii Electric Light Company, Inc. (HELCO)
Common stock equity
Total shareholders’ equity	286,647,000	291,291,000
Other long-term debt – unsecured:
Less current portion long-term debt, net of unamortized debt issuance costs	10,992,000
Long-term debt, net	202,701,000	213,703,000
Total capitalization	496,348,000	511,994,000
Hawaii Electric Light Company, Inc. (HELCO) | 3.83%, Series 2013A, due 2020
Other long-term debt – unsecured:
Other long-term debt - unsecured	$ 14,000,000	$ 14,000,000
Hawaii Electric Light Company, Inc. (HELCO) | Series G, 7.625% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 100
Shares outstanding December 31, 2017 and 2016	70,000	70,000
Preferred stock of subsidiaries - not subject to mandatory redemption	$ 7,000,000	$ 7,000,000
Maui Electric Company, Limited (MECO)
Common stock equity
Total shareholders’ equity	270,265,000	259,554,000
Other long-term debt – unsecured:
Less current portion long-term debt, net of unamortized debt issuance costs	8,993,000
Long-term debt, net	190,836,000	190,120,000
Total capitalization	$ 466,101,000	$ 454,674,000
Maui Electric Company, Limited (MECO) | Series H, 7.625% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 100
Shares outstanding December 31, 2017 and 2016	50,000	50,000
Preferred stock of subsidiaries - not subject to mandatory redemption	$ 5,000,000	$ 5,000,000
Hawaiian Electric Company, Inc (HECO)
Common stock equity
Total shareholders’ equity	1,845,283,000	1,799,787,000
Other long-term debt – unsecured:
Less current portion long-term debt, net of unamortized debt issuance costs	29,978,000
Long-term debt, net	924,979,000	915,437,000
Total capitalization	2,792,555,000	2,737,517,000
Hawaiian Electric Company, Inc (HECO) | 4.54%, Series 2016A, due 2046
Other long-term debt – unsecured:
Other long-term debt - unsecured	40,000,000	40,000,000
Hawaiian Electric Company, Inc (HECO) | 4.72%, Series 2012D, due 2029
Other long-term debt – unsecured:
Other long-term debt - unsecured	35,000,000	35,000,000
Hawaiian Electric Company, Inc (HECO) | 5.39%, Series 2012E, due 2042
Other long-term debt – unsecured:
Other long-term debt - unsecured	150,000,000	150,000,000
Hawaiian Electric Company, Inc (HECO) | 4.53%, Series 2012F, due 2032
Other long-term debt – unsecured:
Other long-term debt - unsecured	40,000,000	40,000,000
Hawaiian Electric Company, Inc (HECO) | 6.50 %, series 2004, Junior subordinated deferrable interest debentures, due 2034
Other long-term debt – unsecured:
Other long-term debt - unsecured	$ 51,546,000	$ 51,546,000

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