Consolidated Statements of Cash Flows - HECO (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities
Net income	$ 34,152	$ 38,789
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation of property, plant and equipment	39,726	37,911
Other amortization	935	1,419
Change in deferred income taxes	19,967	21,260
Allowance for equity funds used during construction	(1,215)	(1,940)
Changes in assets and liabilities
Increase in fuel oil stock	(29,272)	(14,458)
Increase in regulatory assets	(17,746)	(13,948)
Change in prepaid and accrued income taxes and utility revenue taxes	(50,933)	(41,126)
Contributions to defined benefit pension and other postretirement benefit plans	(21,476)	(26,815)
Change in other assets and liabilities	(2,776)	(17,046)
Net cash provided by (used in) operating activities	48,319	(15,716)
Cash flows from investing activities
Capital expenditures	(71,041)	(65,300)
Contributions in aid of construction	11,710	22,855
Net cash used in investing activities	(112,551)	(80,862)
Cash flows from financing activities
Common stock dividends	(24,394)	(23,855)
Repayment of long-term debt	(50,000)	(57,500)
Net increase in short-term borrowings from nonaffiliates and affiliate with original maturities of three months or less	50,244	87,467
Other	(3,240)	(3,757)
Net cash provided by financing activities	107,278	62,659
Net increase (decrease) in cash and cash equivalents	43,046	(33,919)
Hawaiian Electric Company, Inc. and Subsidiaries
Cash flows from operating activities
Net income	24,928	27,799
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation of property, plant and equipment	38,280	36,482
Other amortization	957	1,561
Change in deferred income taxes	17,975	20,061
Change in tax credits, net	1,382	1,356
Allowance for equity funds used during construction	(1,215)	(1,940)
Changes in assets and liabilities
Decrease in accounts receivable	38,703	25,001
Decrease (increase) in accrued unbilled revenues	(1,317)	11,184
Increase in fuel oil stock	(29,272)	(14,458)
Increase in materials and supplies	(3,345)	(3,561)
Increase in regulatory assets	(17,746)	(13,948)
Increase (decrease) in accounts payable	38,934	(33,174)
Change in prepaid and accrued income taxes and utility revenue taxes	(53,666)	(44,561)
Contributions to defined benefit pension and other postretirement benefit plans	(21,010)	(26,183)
Change in other assets and liabilities	19,913	3,444
Net cash provided by (used in) operating activities	53,501	(10,937)
Cash flows from investing activities
Capital expenditures	(67,915)	(63,436)
Contributions in aid of construction	11,710	22,855
Net cash used in investing activities	(56,205)	(40,581)
Cash flows from financing activities
Common stock dividends	(20,070)	(18,261)
Preferred stock dividends of HECO and subsidiaries	(499)	(499)
Repayment of long-term debt		(57,500)
Net increase in short-term borrowings from nonaffiliates and affiliate with original maturities of three months or less	43,052	84,942
Other	2	(120)
Net cash provided by financing activities	22,485	8,562
Net increase (decrease) in cash and cash equivalents	19,781	(42,956)
Cash and cash equivalents, beginning of period	17,159	48,806
Cash and cash equivalents, end of period	$ 36,940	$ 5,850