Consolidated Balance Sheets - HECO - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, plant and equipment, net
Total property, plant and equipment, net	$ 4,377,658	$ 4,148,774
Assets, Current [Abstract]
Total assets	11,790,196	11,185,142
Capitalization and liabilities
Common stock equity	1,629,136	1,521,297
Cumulative preferred stock – not subject to mandatory redemption	$ 0	$ 0
Commitments and contingencies
Liabilities
Interest and dividends payable	$ 26,042	$ 25,336
Deferred credits and other liabilities
Deferred income taxes		633,570
Contributions in aid of construction	506,087	466,432
Total capitalization and liabilities	11,790,196	11,185,142
Hawaiian Electric Company, Inc. and Subsidiaries
Property, plant and equipment, net
Land	52,792	52,299
Plant and equipment	6,315,698	6,009,482
Less accumulated depreciation	(2,266,004)	(2,175,510)
Construction in progress	175,309	158,616
Utility property, plant and equipment, net	4,277,795	4,044,887
Nonutility property, plant and equipment, less accumulated depreciation of $1,229 and $1,227 at respective dates	7,272	6,563
Total property, plant and equipment, net	4,285,067	4,051,450
Assets, Current [Abstract]
Cash and cash equivalents	24,449	13,762
Customer accounts receivable, net	132,778	158,484
Accrued unbilled revenues, net	84,509	137,374
Other accounts receivable, net	10,408	4,283
Fuel oil stock, at average cost	71,216	106,046
Materials and supplies, at average cost	54,429	57,250
Prepayments and other	36,640	33,468
Regulatory assets	72,231	71,421
Total current assets	486,660	582,088
Regulatory assets	824,500	833,843
Unamortized debt expense	8,341	8,323
Other	75,486	81,838
Total other long-term assets	908,327	924,004
Total assets	5,680,054	5,557,542
Capitalization and liabilities
Common stock equity	1,728,325	1,682,144
Cumulative preferred stock – not subject to mandatory redemption	$ 34,293	$ 34,293
Commitments and contingencies
Long-term debt, net	$ 1,286,546	$ 1,206,546
Total capitalization	3,049,164	2,922,983
Liabilities
Accounts payable	114,846	163,934
Interest and dividends payable	23,111	22,316
Taxes accrued	191,084	250,402
Regulatory liabilities	2,204	632
Other	54,079	61,664
Total current liabilities	385,324	498,948
Deferred credits and other liabilities
Deferred income taxes	654,806	573,439
Regulatory liabilities	369,339	344,217
Unamortized tax credits	84,214	79,492
Defined benefit pension and other postretirement benefit plans liability	552,974	595,395
Other	78,146	76,636
Total deferred credits and other liabilities	1,739,479	1,669,179
Contributions in aid of construction	506,087	466,432
Total capitalization and liabilities	$ 5,680,054	$ 5,557,542