Consolidated Statements of Cash Flows - HECO - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities
Net income	$ 203,664	$ 167,187	$ 250,146
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation of property, plant and equipment	214,036	200,658	194,273
Other amortization	41,593	21,340	10,473
Deferred income taxes	(9,368)	37,835	47,118
Allowance for equity funds used during construction	(10,877)	(12,483)	(8,325)
Other	(4,219)	(3,324)	(12,422)
Changes in assets and liabilities
Decrease (increase) in fuel oil stock	7,054	(20,794)	4,786
Decrease (increase) in regulatory assets	9,252	(17,256)	(18,273)
Change in prepaid and accrued income taxes, tax credits and revenue taxes	29,429	20,685	39,109
Increase in defined benefit pension and other postretirement benefit plans liability	20,871	882	1,587
Change in other assets and liabilities	15,488	(25,551)	(23,118)
Net cash provided by operating activities	499,312	420,441	495,658
Cash flows from investing activities
Capital expenditures	(537,369)	(495,187)	(330,043)
Contributions in aid of construction	30,599	64,733	30,100
Other, net	13,945	6,468	856
Net cash used in investing activities	(792,059)	(815,299)	(736,465)
Cash flows from financing activities
Common stock dividends	(134,987)	(134,873)	(117,274)
Proceeds from issuance of common stock	0	0	13,220
Proceeds from issuance of long-term debt	250,000	532,325	115,000
Repayment of long-term debt and funds transferred for redemption of special purpose revenue bonds	(53,887)	(465,000)	(75,000)
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less	(18,999)	67,992	(103,063)
Other	(1,603)	(6,349)	2,197
Net cash used in financing activities	200,074	378,287	218,781
Net decrease in cash and equivalents	(92,673)	(16,571)	(22,026)
Hawaiian Electric Company, Inc. and Subsidiaries
Cash flows from operating activities
Net income	145,648	121,946	144,312
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation of property, plant and equipment	203,626	192,784	187,061
Other amortization	26,602	8,498	6,935
Deferred income taxes	(7,982)	38,037	74,386
Allowance for equity funds used during construction	(10,877)	(12,483)	(8,325)
Other	(1,570)	(1,066)	(3,700)
Changes in assets and liabilities
Decrease (increase) in accounts receivable	(50,917)	2,914	8,551
Increase in accrued unbilled revenues	(14,684)	(15,361)	(7,184)
Decrease (increase) in fuel oil stock	6,938	(20,443)	4,786
Decrease (increase) in materials and supplies	(807)	(718)	750
Decrease (increase) in regulatory assets	9,252	(17,256)	(18,273)
Increase (decrease) in accounts payable	24,358	25,734	(10,614)
Change in prepaid and accrued income taxes, tax credits and revenue taxes	25,036	29,862	2,123
Increase in defined benefit pension and other postretirement benefit plans liability	18,746	604	484
Change in other assets and liabilities	20,244	(17,866)	(11,375)
Net cash provided by operating activities	393,613	335,186	369,917
Cash flows from investing activities
Capital expenditures	(445,863)	(441,598)	(320,437)
Contributions in aid of construction	30,599	64,733	30,100
Other, net	10,082	4,578	2,138
Net cash used in investing activities	(405,182)	(372,287)	(288,199)
Cash flows from financing activities
Common stock dividends	(103,305)	(87,767)	(93,599)
Preferred stock dividends of Hawaiian Electric and subsidiaries	(1,995)	(1,995)	(1,995)
Proceeds from issuance of common stock	70,700	14,000	24,000
Proceeds from issuance of long-term debt	100,000	315,000	40,000
Repayment of long-term debt and funds transferred for redemption of special purpose revenue bonds	(50,000)	(265,000)	0
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less	(4,999)	4,999	0
Proceeds from other borrowings	25,000	0	0
Other	(472)	(3,905)	(287)
Net cash used in financing activities	34,929	(24,668)	(31,881)
Net decrease in cash and equivalents	23,360	(61,769)	49,837
Cash and cash equivalents, beginning of period	12,517	74,286	24,449
Cash and cash equivalents, end of period	$ 35,877	$ 12,517	$ 74,286