Consolidated Statements of Cash Flows - HECO - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities
Net income	$ 161,767	$ 170,019	$ 163,599
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation of property, plant and equipment	183,966	172,762	160,061
Other amortization	11,619	10,282	7,324
Impairment of utility assets	6,021	1,866	0
Other	1,672	758	0
Increase in deferred income taxes	41,433	104,226	80,145
Allowance for equity funds used during construction	(6,928)	(6,771)	(5,561)
Change in cash overdraft	0	(1,038)	1,038
Changes in assets and liabilities
Decrease in fuel oil stock	34,830	28,041	27,332
Increase in regulatory assets	(24,182)	(17,000)	(65,461)
Change in prepaid and accrued income taxes and revenue taxes	(42,596)	(39,091)	(19,406)
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability	852	22,251	(33,014)
Change in other assets and liabilities	(41,071)	(101,196)	(14,292)
Net cash provided by operating activities	355,880	325,420	361,568
Cash flows from investing activities
Capital expenditures	(363,804)	(364,826)	(389,438)
Contributions in aid of construction	40,239	41,806	32,160
Other	7,940	1,125	1,177
Net cash used in investing activities	(705,724)	(592,449)	(598,182)
Cash flows from financing activities
Common stock dividends	(131,765)	(126,458)	(98,383)
Net proceeds from issuance of common stock	104,435	26,898	55,086
Proceeds from issuance of long-term debt	80,000	125,000	286,000
Repayment of long-term debt	0	(111,400)	(216,000)
Other	(833)	(456)	(1,187)
Net cash used in financing activities	474,780	222,535	236,988
Net increase (decrease) in cash and equivalents	124,936	(44,494)	374
Hawaiian Electric Company, Inc. and Subsidiaries
Cash flows from operating activities
Net income	137,709	139,636	124,924
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation of property, plant and equipment	177,380	166,387	154,025
Other amortization	8,939	9,897	7,734
Impairment of utility assets	6,021	1,866	0
Other	1,672	758	0
Increase in deferred income taxes	75,626	82,947	64,507
Change in tax credits, net	4,844	6,062	7,017
Allowance for equity funds used during construction	(6,928)	(6,771)	(5,561)
Change in cash overdraft	0	(1,038)	1,038
Changes in assets and liabilities
Decrease in accounts receivable	23,727	26,743	49,445
Decrease (increase) in accrued unbilled revenues	40,093	6,750	(9,826)
Decrease in fuel oil stock	34,830	28,041	27,332
Decrease (increase) in materials and supplies	2,821	(72)	(7,959)
Increase in regulatory assets	(24,182)	(17,000)	(65,461)
Increase (decrease) in accounts payable	(54,555)	(65,527)	14,731
Change in prepaid and accrued income taxes and revenue taxes	(63,096)	(4,036)	(2,028)
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability	1,125	(961)	2,240
Change in other assets and liabilities	(32,620)	(66,687)	(35,293)
Net cash provided by operating activities	333,406	306,995	326,865
Cash flows from investing activities
Capital expenditures	(350,161)	(336,679)	(378,044)
Contributions in aid of construction	40,239	41,806	32,160
Other	1,140	1,164	907
Net cash used in investing activities	(308,782)	(293,709)	(344,977)
Cash flows from financing activities
Common stock dividends	(90,405)	(88,492)	(81,578)
Preferred stock dividends of Hawaiian Electric and subsidiaries	(1,995)	(1,995)	(1,995)
Net proceeds from issuance of common stock	0	40,000	78,500
Proceeds from issuance of long-term debt	80,000	0	236,000
Repayment of long-term debt	0	(11,400)	(166,000)
Other	(1,537)	(462)	(1,149)
Net cash used in financing activities	(13,937)	(62,349)	63,778
Net increase (decrease) in cash and equivalents	10,687	(49,063)	45,666
Cash and cash equivalents, beginning of period	13,762	62,825	17,159
Cash and cash equivalents, end of period	$ 24,449	$ 13,762	$ 62,825