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Total costs of sales and operating expenses for the period.

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Electric utility segment Consolidating Statement of Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended			0 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	May 31, 2013
Expenses
Total expenses									$ 2,910,618us-gaap_CostsAndExpenses	$ 2,923,051us-gaap_CostsAndExpenses	$ 3,090,799us-gaap_CostsAndExpenses
Total operating income	67,241us-gaap_OperatingIncomeLoss	91,102us-gaap_OperatingIncomeLoss	82,275us-gaap_OperatingIncomeLoss	88,306us-gaap_OperatingIncomeLoss	78,349us-gaap_OperatingIncomeLoss	88,038us-gaap_OperatingIncomeLoss	80,207us-gaap_OperatingIncomeLoss	68,825us-gaap_OperatingIncomeLoss	328,924us-gaap_OperatingIncomeLoss	315,419us-gaap_OperatingIncomeLoss	284,196us-gaap_OperatingIncomeLoss
Allowance for equity funds used during construction									6,771	5,561	7,007
Allowance for borrowed funds used during construction									2,579	2,246	4,355
Income before income taxes									261,922	247,747	217,407
Income taxes									91,712us-gaap_IncomeTaxExpenseBenefit	84,341us-gaap_IncomeTaxExpenseBenefit	76,859us-gaap_IncomeTaxExpenseBenefit
Net income	33,630us-gaap_ProfitLoss	48,286us-gaap_ProfitLoss	41,894us-gaap_ProfitLoss	46,400us-gaap_ProfitLoss	39,486us-gaap_ProfitLoss	48,707us-gaap_ProfitLoss	41,061us-gaap_ProfitLoss	34,152us-gaap_ProfitLoss	170,210us-gaap_ProfitLoss	163,406us-gaap_ProfitLoss	140,548us-gaap_ProfitLoss
Preferred stock dividends of subsidiaries									1,890	1,890	1,890
Net income for common stock	33,157	47,815	41,421	45,927	39,013	48,236	40,588	33,679	168,320	161,516	138,658
HECO
Revenues									2,142,245	2,124,174	2,228,233
Expenses
Fuel oil									821,246	851,365	945,246
Purchased power									537,821	527,839	540,802
Other operation and maintenance									283,532	283,768	266,208
Depreciation									109,204	99,738	90,783
Taxes, other than income taxes									201,426	200,962	209,943
Impairment of utility assets										0	29,000
Total expenses									1,953,229	1,963,672	2,081,982
Total operating income									189,016	160,502	146,251
Allowance for equity funds used during construction									6,085	4,495	5,735
Equity in earnings of subsidiaries									40,964	41,410	28,836
Interest expense and other charges, net									(44,041)	(39,107)	(40,842)
Allowance for borrowed funds used during construction									2,306	1,814	3,642
Income before income taxes									194,330	169,114	143,622
Income taxes									55,609	45,105	43,266
Net income									138,721	124,009	100,356
Net income attributable to Hawaiian Electric									138,721	124,009	100,356
Preferred stock dividends of Hawaiian Electric									1,080	1,080	1,080
Net income for common stock									137,641	122,929	99,276
HELCO
Revenues									422,200	431,517	441,013
Expenses
Fuel oil									117,215	125,516	116,866
Purchased power									123,226	128,368	145,386
Other operation and maintenance									65,471	61,418	60,447
Depreciation									35,904	34,188	33,337
Taxes, other than income taxes									39,521	40,092	41,370
Impairment of utility assets										0	5,500
Total expenses									381,337	389,582	402,906
Total operating income									40,863	41,935	38,107
Allowance for equity funds used during construction									472	643	585
Interest expense and other charges, net									(11,030)	(11,341)	(12,066)
Allowance for borrowed funds used during construction									182	263	235
Income before income taxes									30,487	31,500	26,861
Income taxes									11,264	10,830	10,115
Net income									19,223	20,670	16,746
Preferred stock dividends of subsidiaries									534	534	534
Net income attributable to Hawaiian Electric									18,689	20,136	16,212
Net income for common stock									18,689	20,136	16,212
MECO
Revenues									422,965	424,603	440,270	5,300
Expenses
Fuel oil									193,224	208,671	235,307
Purchased power									60,961	54,474	38,052
Other operation and maintenance									61,609	58,081	70,771
Depreciation									21,279	20,099	20,378
Taxes, other than income taxes									39,916	40,077	41,528
Impairment of utility assets										0	5,500
Total expenses									376,989	381,402	411,536
Total operating income									45,976	43,201	28,734
Allowance for equity funds used during construction									214	423	687
Interest expense and other charges, net									(9,773)	(8,953)	(9,224)
Allowance for borrowed funds used during construction									91	169	478
Income before income taxes									36,508	34,840	20,675
Income taxes									13,852	13,182	7,667
Net income									22,656	21,658	13,008
Preferred stock dividends of subsidiaries									381	381	381
Net income attributable to Hawaiian Electric									22,275	21,277	12,627
Net income for common stock									22,275	21,277	12,627
Other subsidiaries
Revenues									0
Expenses
Other operation and maintenance										3	3
Total expenses									0	3	3
Total operating income									0	(3)	(3)
Income before income taxes									0	(3)	(3)
Income taxes									0
Net income									0	(3)	(3)
Net income attributable to Hawaiian Electric									0	(3)	(3)
Net income for common stock									0	(3)	(3)
Consolidating adjustments
Revenues									(87)	(122)	(77)
Expenses
Total operating income									(87)	(122)	(77)
Equity in earnings of subsidiaries									(40,964)	(41,410)	(28,836)
Interest expense and other charges, net									87	122	77
Income before income taxes									(40,964)	(41,410)	(28,836)
Income taxes									0
Net income									(40,964)	(41,410)	(28,836)
Net income attributable to Hawaiian Electric									(40,964)	(41,410)	(28,836)
Net income for common stock									(40,964)	(41,410)	(28,836)
HECO Consolidated
Revenues									2,987,323	2,980,172	3,109,439
Expenses
Fuel oil									1,131,685	1,185,552	1,297,419
Purchased power									722,008	710,681	724,240
Other operation and maintenance									410,612	403,270	397,429
Depreciation									166,387	154,025	144,498
Taxes, other than income taxes									280,863	281,131	292,841
Impairment of utility assets									0	0	40,000
Total expenses									2,711,555	2,734,659	2,896,427
Total operating income	58,878	76,156	70,068	70,666	65,564	69,853	58,975	51,121	275,768	245,513	213,012
Allowance for equity funds used during construction									6,771	5,561	7,007
Interest expense and other charges, net									(64,757)	(59,279)	(62,055)
Allowance for borrowed funds used during construction									2,579	2,246	4,355
Income before income taxes									220,361	194,041	162,319
Income taxes									80,725	69,117	61,048
Net income	29,611	39,377	34,729	35,919	32,489	38,315	29,192	24,928	139,636	124,924	101,271
Preferred stock dividends of subsidiaries									915	915	915
Net income attributable to Hawaiian Electric									138,721	124,009	100,356
Preferred stock dividends of Hawaiian Electric									1,080	1,080	1,080
Net income for common stock	$ 29,112	$ 38,879	$ 34,230	$ 35,420	$ 31,990	$ 37,817	$ 28,693	$ 24,429	$ 137,641	$ 122,929	$ 99,276