Hawaiian Electric Industries (HE) 10-K 28 Feb 20 2019 FY Annual report Financial data

Cover Page

Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2019	Feb. 13, 2020	Jun. 30, 2019
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2019
Document Transition Report	false
Entity Registrant Name	Hawaiian Electric Industries, Inc.
Entity File Number	1-8503
Entity Tax Identification Number	99-0208097
Entity Central Index Key	0000354707
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Incorporation, State or Country Code	HI
Entity Address, Address Line One	1001 Bishop Street, Suite 2900
Entity Address, City or Town	Honolulu
Entity Address, State or Province	HI
Entity Address, Postal Zip Code	96813
City Area Code	808
Local Phone Number	543-5662
Title of 12(b) Security	Common Stock, Without Par Value
Trading Symbol	HE
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 4,745,752,027
Entity Common Stock, Shares Outstanding		108,973,328
Documents Incorporated by Reference	Hawaiian Electric’s Exhibit 99.1, consisting of: Hawaiian Electric’s Directors, Executive Officers and Corporate Governance—Part III Hawaiian Electric’s Executive Compensation—Part III Hawaiian Electric’s Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters— Part III Hawaiian Electric’s Certain Relationships and Related Transactions, and Director Independence—Part III Hawaiian Electric’s Principal Accounting Fees and Services—Part III Selected sections of Proxy Statement of HEI for the 2020 Annual Meeting of Shareholders to be filed-Part III This combined Form 10-K represents separate filings by Hawaiian Electric Industries, Inc. and Hawaiian Electric Company, Inc. Information contained herein relating to any individual registrant is filed by each registrant on its own behalf. Hawaiian Electric makes no representations as to any information not relating to it or its subsidiaries.
Hawaiian Electric Company, Inc. and Subsidiaries
Entity Information [Line Items]
Entity Registrant Name	Hawaiian Electric Company, Inc.
Entity File Number	1-4955
Entity Tax Identification Number	99-0040500
Entity Central Index Key	0000046207
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Address, Address Line One	1001 Bishop Street, Suite 2500
Entity Address, City or Town	Honolulu
Entity Address, State or Province	HI
Entity Address, Postal Zip Code	96813
City Area Code	808
Local Phone Number	543-7771
Title of 12(g) Security	Cumulative Preferred Stock
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		17,048,783

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues
Revenues	$ 2,874,601	$ 2,860,849	$ 2,555,625
Expenses
Total expenses	2,525,927	2,527,493	2,209,392
Operating income (loss)
Operating income	348,674	333,356	346,233
Retirement defined benefits expense—other than service costs	(2,806)	(5,962)	(7,942)
Interest expense, net – other than on deposit liabilities and other bank borrowings	(90,899)	(88,677)	(78,972)
Allowance for borrowed funds used during construction	4,453	4,867	4,778
Allowance for equity funds used during construction	11,987	10,877	12,483
Income before income taxes	271,409	254,461	276,580
Income taxes	51,637	50,797	109,393
Net income (loss)	219,772	203,664	167,187
Preferred stock dividends of subsidiaries	1,890	1,890	1,890
Net income for common stock	$ 217,882	$ 201,774	$ 165,297
Basic earnings per common share (in dollars per share)	$ 2	$ 1.85	$ 1.52
Diluted earnings per common share (in dollars per share)	$ 1.99	$ 1.85	$ 1.52
Weighted-average number of common shares outstanding (in shares)	108,949	108,855	108,749
Net effect of potentially dilutive shares (in shares)	458	291	184
Weighted-average shares assuming dilution (in shares)	109,407	109,146	108,933
Electric utility
Revenues
Revenues	$ 2,545,942	$ 2,546,525	$ 2,257,566
Expenses
Total expenses	2,291,564	2,304,864	1,994,042
Operating income (loss)
Operating income	254,378	241,661	263,524
Income before income taxes	197,140	180,426	205,145
Income taxes	38,305	34,778	83,199
Net income (loss)	158,835	145,648	121,946
Preferred stock dividends of subsidiaries	1,995	1,995	1,995
Net income for common stock	156,840	143,653	119,951
Bank
Revenues
Revenues	328,570	314,275	297,640
Expenses
Total expenses	217,008	206,040	198,104
Operating income (loss)
Operating income	111,562	108,235	99,536
Income before income taxes	112,034	106,578	98,716
Income taxes	23,061	24,069	31,719
Net income (loss)	88,973	82,509	66,997
Preferred stock dividends of subsidiaries	0	0	0
Net income for common stock	88,973	82,509	66,997
Other
Revenues
Revenues	89	49	419
Expenses
Total expenses	17,355	16,589	17,246
Operating income (loss)
Operating income	(17,266)	(16,540)	(16,827)
Income before income taxes	(37,765)	(32,543)	(27,281)
Income taxes	(9,729)	(8,050)	(5,525)
Net income (loss)	(28,036)	(24,493)	(21,756)
Preferred stock dividends of subsidiaries	(105)	(105)	(105)
Net income for common stock	$ (27,931)	$ (24,388)	$ (21,651)

Consolidated Statements of In_2

Consolidated Statements of Income (Parenthetical) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Bank
Gain on sale of properties	$ 10.8

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income for common stock	$ 217,882	$ 201,774	$ 165,297
Net unrealized gains (losses) on available-for sale investment securities:
Net unrealized gains (losses) on available-for sale investment securities arising during the period, net of (taxes) benefits of $(10,024), $3,468 and $2,886 for 2019, 2018 and 2017, respectively	27,382	(9,472)	(4,370)
Reclassification adjustment for net realized gains included in net income, net of taxes of $175, nil and nil for 2019, 2018 and 2017, respectively	(478)	0	0
Derivatives qualified as cash flow hedges:
Unrealized interest rate hedging losses, net of tax benefit of $409, $151 and nil for 2019, 2018 and 2017, respectively	(1,177)	(436)	0
Reclassification adjustment to net income, net of tax benefits of nil, nil and $289 for 2019, 2018 and 2017, respectively	0	0	454
Retirement benefit plans:
Net gains (losses) arising during the period, net of (taxes) benefits of $(3,892), $9,810 and $(41,129) for 2019, 2018 and 2017, respectively	10,914	(28,101)	65,531
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $3,512, $7,317 and $10,041 for 2019, 2018 and 2017, respectively	10,107	21,015	15,737
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits of $(5,610), $2,887 and $(49,523) for 2019, 2018 and 2017, respectively	(16,177)	8,325	(78,724)
Other comprehensive income (loss), net of taxes	30,571	(8,669)	(1,372)
Comprehensive income	$ 248,453	$ 193,105	$ 163,925

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net unrealized gains (losses) on securities arising during the period, tax (benefits)	$ 10,024	$ (3,468)	$ (2,886)
Reclassification adjustment for net realized gains included in net income, tax expenses	175	0	0
Foreign currency hedge net unrealized loss, taxes (benefits)	(409)	(151)	0
Reclassification adjustment to net income, taxes (benefits)	0	0	(289)
Net gains (losses) arising during the period, taxes (benefits)	3,892	(9,810)	41,129
Amortization of net loss, prior service gain and transition obligation included in net periodic benefit cost, tax benefits	(3,512)	(7,317)	(10,041)
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, (taxes) benefits	$ (5,610)	$ 2,887	$ (49,523)

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
ASSETS
Cash and cash equivalents	$ 196,813,000	$ 169,208,000
Restricted cash	30,872,000	0
Accounts receivable and unbilled revenues, net	300,794,000	325,672,000
Available-for-sale investment securities, at fair value	1,232,826,000	1,388,533,000
Held-to-maturity investment securities, at amortized cost	139,451,000	141,875,000
Stock in Federal Home Loan Bank, at cost	8,434,000	9,958,000
Loans held for investment, net	5,067,821,000	4,790,902,000
Loans held for sale, at lower of cost or fair value	12,286,000	1,805,000
Property, plant and equipment, net
Land	100,161,000	102,925,000
Plant and equipment	7,545,083,000	7,118,709,000
Construction in progress	229,953,000	267,714,000
Property, plant and equipment, gross	7,875,197,000	7,489,348,000
Less – accumulated depreciation	(2,765,569,000)	(2,659,230,000)
Total property, plant and equipment, net	5,109,628,000	4,830,118,000
Operating lease right-of-use-assets	199,171,000
Regulatory assets	715,080,000	833,426,000
Other	649,885,000	530,364,000
Goodwill	82,190,000	82,190,000
Total assets	13,745,251,000	13,104,051,000
Liabilities
Accounts payable	220,633,000	214,773,000
Interest and dividends payable	24,941,000	28,254,000
Deposit liabilities	6,271,902,000	6,158,852,000
Short-term borrowings—other than bank	185,710,000	73,992,000
Other bank borrowings	115,110,000	110,040,000
Long-term debt, net—other than bank	1,964,365,000	1,879,641,000
Deferred income taxes	379,324,000	372,518,000
Operating lease, liability	199,571,000
Regulatory liabilities	972,310,000	950,236,000
Defined benefit pension and other postretirement benefit plans liability	513,287,000	538,384,000
Other	583,545,000	580,788,000
Total liabilities	11,430,698,000	10,907,478,000
Preferred stock of subsidiaries - not subject to mandatory redemption	34,293,000	34,293,000
Commitments and contingencies
Shareholders' equity
Preferred stock, no par value, authorized 10,000,000 shares; issued: none	0	0
Common stock, no par value, authorized 200,000,000 shares; issued and outstanding: 108,973,328 shares and 108,879,245 shares at December 31, 2019 and 2018, respectively	1,678,257,000	1,669,267,000
Retained earnings	622,042,000	543,623,000
Accumulated other comprehensive loss, net of tax benefits
Net unrealized gains (losses) on securities	2,481,000	(24,423,000)
Unrealized losses on derivatives	(1,613,000)	(436,000)
Retirement benefit plans	(20,907,000)	(25,751,000)
Accumulated other comprehensive loss, net of tax benefits	(20,039,000)	(50,610,000)
Total shareholders’ equity	2,280,260,000	2,162,280,000
Total capitalization and liabilities	$ 13,745,251,000	$ 13,104,051,000

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - shares	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Preferred stock, authorized shares	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Common stock, authorized shares	200,000,000	200,000,000
Common stock, issued shares	108,973,328	108,879,245
Common stock, outstanding shares	108,973,328	108,879,245

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common stock	Retained earnings	Accumulated other comprehensive income (loss)
Beginning Balance at Dec. 31, 2016	$ 2,066,753	$ 1,660,910	$ 438,972	$ (33,129)
Balance (in shares) at Dec. 31, 2016		108,583,000
Increase (decrease) in stockholders' equity
Net income for common stock	165,297		165,297
Other comprehensive income (loss), net of tax benefits	(1,372)			(1,372)
Reclass of AOCI for tax rate reduction impact			7,440	(7,440)
Issuance of common stock: Share-based plans	4,664	$ 4,664
Issuance of common stock: Share-based plans (in shares)		205,000
Issuance of common stock: Share-based expenses and other, net	(3,083)	$ (3,083)
Common stock dividends	(134,873)		(134,873)
Ending Balance at Dec. 31, 2017	2,097,386	$ 1,662,491	476,836	(41,941)
Balance (in shares) at Dec. 31, 2017		108,788,000
Increase (decrease) in stockholders' equity
Net income for common stock	201,774		201,774
Other comprehensive income (loss), net of tax benefits	(8,669)			(8,669)
Issuance of common stock: Share-based plans	2,650	$ 2,650
Issuance of common stock: Share-based plans (in shares)		91,000
Issuance of common stock: Share-based expenses and other, net	4,126	$ 4,126
Common stock dividends	(134,987)		(134,987)
Ending Balance at Dec. 31, 2018	$ 2,162,280	$ 1,669,267	543,623	(50,610)
Balance (in shares) at Dec. 31, 2018	108,879,245	108,879,000
Increase (decrease) in stockholders' equity
Net income for common stock	$ 217,882		217,882
Other comprehensive income (loss), net of tax benefits	30,571			30,571
Issuance of common stock: Share-based plans	3,092	$ 3,092
Issuance of common stock: Share-based plans (in shares)		94,000
Issuance of common stock: Share-based expenses and other, net	5,898	$ 5,898
Common stock dividends	(139,463)		(139,463)
Ending Balance at Dec. 31, 2019	$ 2,280,260	$ 1,678,257	$ 622,042	$ (20,039)
Balance (in shares) at Dec. 31, 2019	108,973,328	108,973,000

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]
Common stock dividends (in dollars per share)	$ 0.32	$ 0.32	$ 0.32	$ 0.32	$ 0.31	$ 0.31	$ 0.31	$ 0.31	$ 1.28	$ 1.24	$ 1.24

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net income	$ 219,772,000	$ 203,664,000	$ 167,187,000
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation of property, plant and equipment	229,858,000	214,036,000	200,658,000
Other amortization	48,255,000	41,593,000	21,340,000
Provision for loan losses	23,480,000	14,745,000	10,901,000
Loans originated, held for sale	(285,042,000)	(109,537,000)	(115,104,000)
Proceeds from sale of loans, held for sale	277,119,000	112,182,000	127,951,000
Gain on sale of real estate, held for sale	(10,762,000)	0	0
Deferred income taxes	(15,085,000)	(9,368,000)	37,835,000
Share-based compensation expense	9,986,000	7,792,000	5,404,000
Allowance for equity funds used during construction	(11,987,000)	(10,877,000)	(12,483,000)
Other	10,822,000	(4,219,000)	(3,324,000)
Changes in assets and liabilities
Decrease (increase) in accounts receivable and unbilled revenues, net	26,083,000	(64,321,000)	(12,875,000)
Decrease (increase) in fuel oil stock	(11,493,000)	7,054,000	(20,794,000)
Decrease (increase) in regulatory assets	71,262,000	9,252,000	(17,256,000)
Increase (decrease) in accounts, interest and dividends payable	(3,054,000)	21,528,000	34,985,000
Change in prepaid and accrued income taxes, tax credits and utility revenue taxes	(27,538,000)	29,429,000	20,685,000
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability	(4,482,000)	20,871,000	882,000
Change in other assets and liabilities	(34,724,000)	15,488,000	(25,551,000)
Net cash provided by operating activities	512,470,000	499,312,000	420,441,000
Cash flows from investing activities
Available-for-sale investment securities purchased	(108,088,000)	(224,335,000)	(528,379,000)
Principal repayments on available-for-sale investment securities	272,949,000	218,930,000	220,231,000
Proceeds from sale of available-for-sale investment securities	19,810,000	0	0
Purchases of held-to-maturity investment securities	(13,057,000)	(103,184,000)	(44,515,000)
Proceeds from repayments or maturities of held-to-maturity investment securities	15,505,000	5,720,000	0
Purchase of stock from Federal Home Loan Bank	(95,636,000)	(28,292,000)	(2,868,000)
Redemption of stock from Federal Home Loan Bank	97,160,000	28,040,000	4,380,000
Net decrease (increase) in loans held for investment	(300,210,000)	(189,352,000)	15,887,000
Proceeds from sale of commercial loans	0	7,149,000	36,760,000
Proceeds from sale of real estate held for sale	21,060,000	0	0
Capital expenditures	(457,520,000)	(506,770,000)	(430,454,000)
Contributions to low income housing investments	(6,974,000)	(14,499,000)	(17,505,000)
Acquisition of business	0	0	(76,323,000)
Other, net	13,292,000	14,534,000	7,487,000
Net cash used in investing activities	(541,709,000)	(792,059,000)	(815,299,000)
Cash flows from financing activities
Net increase in deposit liabilities	113,050,000	165,880,000	341,668,000
Net increase (decrease) in short-term borrowings with original maturities of three months or less	86,718,000	(18,999,000)	67,992,000
Proceeds from issuance of short-term debt	75,000,000	25,000,000	125,000,000
Repayment of short-term debt	(50,000,000)	(50,000,000)	(75,000,000)
Net increase in other bank borrowings with original maturities of three months or less	5,070,000	71,556,000	61,776,000
Repayment of other bank borrowings	0	(50,000,000)	(63,534,000)
Proceeds from issuance of long-term debt	289,349,000	250,000,000	532,325,000
Repayment of long-term debt and funds transferred for repayment of long-term debt	(287,285,000)	(53,887,000)	(465,000,000)
Withheld shares for employee taxes on vested share-based compensation	(997,000)	(996,000)	(3,828,000)
Common stock dividends	(139,463,000)	(134,987,000)	(134,873,000)
Preferred stock dividends of subsidiaries	(1,890,000)	(1,890,000)	(1,890,000)
Other	(1,836,000)	(1,603,000)	(6,349,000)
Net cash used in financing activities	87,716,000	200,074,000	378,287,000
Net decrease in cash and equivalents	58,477,000	(92,673,000)	(16,571,000)
Cash, cash equivalents and restricted cash, January 1	169,208,000	261,881,000	278,452,000
Cash, cash equivalents and restricted cash, December 31	227,685,000	169,208,000	261,881,000
Less: Restricted cash	(30,872,000)	0	0
Cash and cash equivalents, December 31	$ 196,813,000	$ 169,208,000	$ 261,881,000

Consolidated Statements of In_3

Consolidated Statements of Income - HECO Statement - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues	$ 725,966	$ 771,535	$ 715,485	$ 661,615	$ 761,650	$ 768,048	$ 685,277	$ 645,874	$ 2,874,601	$ 2,860,849	$ 2,555,625
Expenses
Total expenses									2,525,927	2,527,493	2,209,392
Operating income	100,795	97,308	72,634	77,937	84,604	98,064	78,799	71,889	348,674	333,356	346,233
Allowance for equity funds used during construction									11,987	10,877	12,483
Retirement defined benefits expense—other than service costs									(2,806)	(5,962)	(7,942)
Allowance for borrowed funds used during construction									4,453	4,867	4,778
Income before income taxes									271,409	254,461	276,580
Income taxes									51,637	50,797	109,393
Net income (loss)	66,736	63,890	42,985	46,161	50,046	66,371	46,527	40,720	219,772	203,664	167,187
Preferred stock dividends of subsidiaries									1,890	1,890	1,890
Net income for common stock	66,263	63,419	42,512	45,688	49,573	65,900	46,054	40,247	217,882	201,774	165,297
Hawaiian Electric Company, Inc. and Subsidiaries
Revenues	645,333	688,330	633,784	578,495	680,563	687,409	608,126	570,427	2,545,942	2,546,525	2,257,566
Expenses
Fuel oil									720,709	760,528	587,768
Purchased power									633,256	639,307	586,634
Other operation and maintenance									481,737	461,491	411,907
Depreciation									215,731	203,626	192,784
Taxes, other than income taxes									240,131	239,912	214,949
Total expenses									2,291,564	2,304,864	1,994,042
Operating income	70,331	71,793	55,694	56,560	61,112	74,036	55,144	51,369	254,378	241,661	263,524
Allowance for equity funds used during construction									11,987	10,877	12,483
Retirement defined benefits expense—other than service costs									(2,836)	(3,631)	(6,003)
Interest expense and other charges, net									(70,842)	(73,348)	(69,637)
Allowance for borrowed funds used during construction									4,453	4,867	4,778
Income before income taxes									197,140	180,426	205,145
Income taxes									38,305	34,778	83,199
Net income (loss)	45,860	47,277	33,073	32,625	35,796	50,210	31,668	27,974	158,835	145,648	121,946
Preferred stock dividends of subsidiaries									915	915	915
Net income attributable to Hawaiian Electric									157,920	144,733	121,031
Preferred stock dividends of Hawaiian Electric									1,080	1,080	1,080
Net income for common stock	$ 45,361	$ 46,779	$ 32,574	$ 32,126	$ 35,297	$ 49,712	$ 31,169	$ 27,475	$ 156,840	$ 143,653	$ 119,951

Consolidated Statements of Co_3

Consolidated Statements of Comprehensive Income - HECO - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net income for common stock	$ 66,263	$ 63,419	$ 42,512	$ 45,688	$ 49,573	$ 65,900	$ 46,054	$ 40,247	$ 217,882	$ 201,774	$ 165,297
Other comprehensive income (loss), net of taxes:
Reclassification adjustment to net income, net of tax benefits of nil, nil and $289 for 2019, 2018 and 2017, respectively									0	0	454
Retirement benefit plans:
Net gains (losses) arising during the period, net of (taxes) benefits of $(1,821), $9,024 and $(39,587) for 2019, 2018 and 2017, respectively									10,914	(28,101)	65,531
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $3,312, $6,594 and $9,221 for 2019, 2018 and 2017, respectively									10,107	21,015	15,737
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits of $(5,610), $2,887 and $(49,523) for 2019, 2018 and 2017, respectively									(16,177)	8,325	(78,724)
Other comprehensive income (loss), net of taxes									30,571	(8,669)	(1,372)
Comprehensive income									248,453	193,105	163,925
Hawaiian Electric Company, Inc. and Subsidiaries
Net income for common stock	$ 45,361	$ 46,779	$ 32,574	$ 32,126	$ 35,297	$ 49,712	$ 31,169	$ 27,475	156,840	143,653	119,951
Other comprehensive income (loss), net of taxes:
Reclassification adjustment to net income, net of tax benefits of nil, nil and $289 for 2019, 2018 and 2017, respectively									0	0	454
Retirement benefit plans:
Net gains (losses) arising during the period, net of (taxes) benefits of $(1,821), $9,024 and $(39,587) for 2019, 2018 and 2017, respectively									5,249	(26,019)	63,105
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits of $3,312, $6,594 and $9,221 for 2019, 2018 and 2017, respectively									9,550	19,012	14,477
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits of $(5,610), $2,887 and $(49,523) for 2019, 2018 and 2017, respectively									(16,177)	8,325	(78,724)
Other comprehensive income (loss), net of taxes									(1,378)	1,318	(688)
Comprehensive income									$ 155,462	$ 144,971	$ 119,263

Consolidated Statements of Co_4

Consolidated Statements of Comprehensive Income (Parenthetical) - HECO - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Foreign currency hedge net unrealized loss, taxes (benefits)	$ (409)	$ (151)	$ 0
Reclassification adjustment to net income, taxes (benefits)	0	0	(289)
Net gains (losses) arising during the period, taxes (benefits)	3,892	(9,810)	41,129
Amortization of net loss, prior service gain and transition obligation included in net periodic benefit cost, tax benefits	(3,512)	(7,317)	(10,041)
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, (taxes) benefits	(5,610)	2,887	(49,523)
Hawaiian Electric Company, Inc. and Subsidiaries
Foreign currency hedge net unrealized loss, taxes (benefits)	0	0	0
Reclassification adjustment to net income, taxes (benefits)	0	0	(289)
Net gains (losses) arising during the period, taxes (benefits)	1,821	(9,024)	39,587
Amortization of net loss, prior service gain and transition obligation included in net periodic benefit cost, tax benefits	(3,312)	(6,594)	(9,221)
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, (taxes) benefits	$ (5,610)	$ 2,887	$ (49,523)

Consolidated Balance Sheets - H

Consolidated Balance Sheets - HECO - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property, plant and equipment, net
Total property, plant and equipment, net	$ 5,109,628	$ 4,830,118
Current assets
Cash and cash equivalents	196,813	169,208
Restricted cash	30,872	0
Operating lease right-of-use-assets	199,171
Total assets	13,745,251	13,104,051
Capitalization and liabilities
Common stock equity	2,280,260	2,162,280
Commitments and contingencies
Current liabilities
Current portion of operating lease liabilities	63,707
Interest and dividends payable	24,941	28,254
Deferred credits and other liabilities
Deferred income taxes	379,324	372,518
Total capitalization and liabilities	13,745,251	13,104,051
Hawaiian Electric Company, Inc. and Subsidiaries
Property, plant and equipment, net
Land	51,816	49,667
Plant and equipment	7,240,288	6,809,671
Less accumulated depreciation	(2,690,157)	(2,577,342)
Construction in progress	193,074	233,145
Utility property, plant and equipment, net	4,795,021	4,515,141
Nonutility property, plant and equipment, less accumulated depreciation of $111 and $1,255 as of December 31, 2019 and 2018, respectively	6,956	6,961
Total property, plant and equipment, net	4,801,977	4,522,102
Current assets
Cash and cash equivalents	11,022	35,877
Restricted cash	30,872
Customer accounts receivable, net	152,790	177,896
Accrued unbilled revenues, net	117,227	121,738
Other accounts receivable, net	11,568	6,215
Fuel oil stock, at average cost	91,937	79,935
Materials and supplies, at average cost	60,702	55,204
Prepayments and other	116,980	32,118
Regulatory assets	30,710	71,016
Total current assets	623,808	579,999
Operating lease right-of-use-assets	176,809
Regulatory assets	684,370	762,410
Other	101,718	102,992
Total other long-term assets	962,897	865,402
Total assets	6,388,682	5,967,503
Capitalization and liabilities
Common stock equity	2,047,352	1,957,641
Cumulative preferred stock – not subject to mandatory redemption	34,293	34,293
Commitments and contingencies
Long-term debt, net	1,401,714	1,418,802
Total capitalization	3,483,359	3,410,736
Current liabilities
Current portion of operating lease liabilities	63,707
Current portion of long-term debt, net	95,953	0
Short-term borrowings from non-affiliate	88,987	25,000
Accounts payable	187,770	171,791
Interest and dividends payable	20,728	23,215
Taxes accrued, including revenue taxes	207,992	233,333
Regulatory liabilities	30,724	17,977
Other	67,305	60,003
Total current liabilities	763,166	531,319
Deferred credits and other liabilities
Operating lease liabilities	113,400
Deferred income taxes	377,150	383,197
Regulatory liabilities	941,586	932,259
Unamortized tax credits	117,868	91,522
Defined benefit pension and other postretirement benefit plans liability	478,763	503,659
Other	113,390	114,811
Total deferred credits and other liabilities	2,142,157	2,025,448
Total capitalization and liabilities	$ 6,388,682	$ 5,967,503

Consolidated Balance Sheets -_2

Consolidated Balance Sheets - HECO (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Hawaiian Electric Company, Inc. and Subsidiaries
Accumulated depreciation on other property, plant and equipment	$ 111	$ 1,255

Consolidated Statements of Capi

Consolidated Statements of Capitalization - HECO - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Common stock equity
Retained earnings	$ 622,042	$ 543,623
Accumulated other comprehensive income (loss), net of taxes-retirement benefit plans	(20,907)	(25,751)
Total shareholders’ equity	2,280,260	2,162,280
Hawaiian Electric Company, Inc. and Subsidiaries
Common stock equity
Common stock of $6 2/3 par value, Authorized: 50,000,000 shares. Outstanding: 16,142,216 shares and 16,019,785 shares at December 31, 2017 and 2016, respectively	113,678	111,696
Premium on capital stock	714,824	681,305
Retained earnings	1,220,129	1,164,541
Accumulated other comprehensive income (loss), net of taxes-retirement benefit plans	(1,279)	99
Total shareholders’ equity	$ 2,047,352	1,957,641
Shares outstanding December 31, 2019 and 2018	1,234,657
Cumulative preferred stock – not subject to mandatory redemption	$ 34,293	34,293
Long-term debt	1,505,000	1,426,546
Less unamortized debt issuance costs	7,333	7,744
Less current portion long-term debt, net of unamortized debt issuance costs	95,953	0
Long-term debt, net	1,401,714	1,418,802
Total capitalization	3,483,359	3,410,736
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds
Common stock equity
Long-term debt	542,000	462,000
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds | 3.50%, Series 2019, due 2049
Common stock equity
Long-term debt		0
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds | 3.20%, Refunding series 2019, due 2039
Common stock equity
Long-term debt		0
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds | 6.50%, Series 2009, due 2039 - redeemed in 2019
Common stock equity
Long-term debt	0
Hawaiian Electric Company, Inc. and Subsidiaries | Unsecured Debt
Common stock equity
Long-term debt	963,000	964,546
Hawaiian Electric Company, Inc. and Subsidiaries | Unsecured Debt | 3.50%, Series 2019, due 2049
Common stock equity
Long-term debt	80,000
Hawaiian Electric Company, Inc. and Subsidiaries | Unsecured Debt | 3.20%, Refunding series 2019, due 2039
Common stock equity
Long-term debt	150,000
Hawaiian Electric Company, Inc. and Subsidiaries | Unsecured Debt | 3.10%, Refunding series 2017A, due 2026
Common stock equity
Long-term debt	125,000	125,000
Hawaiian Electric Company, Inc. and Subsidiaries | Unsecured Debt | 4.00%, Refunding series 2017B, due 2037
Common stock equity
Long-term debt	140,000	140,000
Hawaiian Electric Company, Inc. and Subsidiaries | Unsecured Debt | 3.25%, Refunding series 2015, due 2025
Common stock equity
Long-term debt	47,000	47,000
Hawaiian Electric Company, Inc. and Subsidiaries | Unsecured Debt | 6.50%, Series 2009, due 2039 - redeemed in 2019
Common stock equity
Long-term debt		150,000
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes
Common stock equity
Long-term debt	963,000	913,000
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.21%, Series 2019A, due 2033
Common stock equity
Long-term debt	50,000	0
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.38%, Series 2018A, due 2028
Common stock equity
Long-term debt	67,500	67,500
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.53%, Series 2018B, due 2033
Common stock equity
Long-term debt	17,500	17,500
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.72%, Series 2018C, due 2048
Common stock equity
Long-term debt	15,000	15,000
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.31%, Series 2017A, due 2047
Common stock equity
Long-term debt	50,000	50,000
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.54%, Series 2016A, due 2046
Common stock equity
Long-term debt	40,000	40,000
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 5.23%, Series 2015A, due 2045
Common stock equity
Long-term debt	80,000	80,000
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 3.83%, Series 2013A, due 2020
Common stock equity
Long-term debt	14,000	14,000
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.45%, Series 2013A and 2013B, due 2022
Common stock equity
Long-term debt	52,000	52,000
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.84%, Series 2013A, 2013B and 2013C, due 2027
Common stock equity
Long-term debt	100,000	100,000
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 5.65%, Series 2013B and 2013C, due 2043
Common stock equity
Long-term debt	70,000	70,000
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.03%, Series 2012B, due 2020
Common stock equity
Long-term debt	82,000	82,000
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.55%, Series 2012B and 2012C, due 2023
Common stock equity
Long-term debt	100,000	100,000
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.72%, Series 2012D, due 2029
Common stock equity
Long-term debt	35,000	35,000
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 5.39%, Series 2012E, due 2042
Common stock equity
Long-term debt	150,000	150,000
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.53%, Series 2012F, due 2032
Common stock equity
Long-term debt	40,000	40,000
Hawaiian Electric Company, Inc. and Subsidiaries | Junior subordinated debt | 6.50 %, series 2004, Junior subordinated deferrable interest debentures, due 2034 - redeemed in 2019
Common stock equity
Long-term debt	$ 0	$ 51,546
Hawaiian Electric | Series C, 4.25% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding December 31, 2019 and 2018	150,000	150,000
Cumulative preferred stock – not subject to mandatory redemption	$ 3,000	$ 3,000
Hawaiian Electric | Series D, 5.00% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding December 31, 2019 and 2018	50,000	50,000
Cumulative preferred stock – not subject to mandatory redemption	$ 1,000	$ 1,000
Hawaiian Electric | Series E, 5.00% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding December 31, 2019 and 2018	150,000	150,000
Cumulative preferred stock – not subject to mandatory redemption	$ 3,000	$ 3,000
Hawaiian Electric | Series H, 5.25% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding December 31, 2019 and 2018	250,000	250,000
Cumulative preferred stock – not subject to mandatory redemption	$ 5,000	$ 5,000
Hawaiian Electric | Series I, 5.00% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding December 31, 2019 and 2018	89,657	89,657
Cumulative preferred stock – not subject to mandatory redemption	$ 1,793	$ 1,793
Hawaiian Electric | Series J, 4.75% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding December 31, 2019 and 2018	250,000	250,000
Cumulative preferred stock – not subject to mandatory redemption	$ 5,000	$ 5,000
Hawaiian Electric | Series K, 4.65% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding December 31, 2019 and 2018	175,000	175,000
Cumulative preferred stock – not subject to mandatory redemption	$ 3,500	$ 3,500
Hawaii Electric Light | Series G, 7.625% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 100
Shares outstanding December 31, 2019 and 2018	70,000	70,000
Cumulative preferred stock – not subject to mandatory redemption	$ 7,000	$ 7,000
Maui Electric | Series H, 7.625% Preferred Stock
Common stock equity
Preferred stock, par value (in dollars per share)	$ 100
Shares outstanding December 31, 2019 and 2018	50,000	50,000
Cumulative preferred stock – not subject to mandatory redemption	$ 5,000	$ 5,000

Consolidated Statements of Ca_2

Consolidated Statements of Capitalization - HECO (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Common stock, authorized shares	200,000,000	200,000,000
Common stock, outstanding shares	108,973,328	108,879,245
Hawaiian Electric Company, Inc. and Subsidiaries
Common stock, par value (in dollars per share)	$ 6.667	$ 6.667
Common stock, authorized shares	50,000,000	50,000,000
Common stock, outstanding shares	17,048,783	16,751,488
Shares outstanding	1,234,657
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds | 3.50%, Series 2019, due 2049
Debt instrument, stated interest rate	3.50%
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds | 3.20%, Refunding series 2019, due 2039
Debt instrument, stated interest rate	3.20%
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds | 3.10% Refunding Series 2017A Due 2026
Debt instrument, stated interest rate	3.10%
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds | 4.00% Refunding Series 2017B, Due 2037
Debt instrument, stated interest rate	4.00%
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds | 3.25% Refunding Series 2015 SPRBs due 2025
Debt instrument, stated interest rate	3.25%
Hawaiian Electric Company, Inc. and Subsidiaries | Special Purpose Revenue Bonds | 6.50%, series 2009, due 2039
Debt instrument, stated interest rate	6.50%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.38%, Series 2018A, due 2028
Debt instrument, stated interest rate	4.38%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.53%, Series 2018B, due 2033
Debt instrument, stated interest rate	4.53%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.72%, Series 2018C, due 2048
Debt instrument, stated interest rate	4.72%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.31%, Series 2017A, due 2047
Debt instrument, stated interest rate	4.31%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.21%, Series 2019A, due 2033
Debt instrument, stated interest rate	4.21%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.54%, Series 2016A, due 2046
Debt instrument, stated interest rate	4.54%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 5.23%, Series 2015A, due 2045
Debt instrument, stated interest rate	5.23%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 3.83%, Series 2013A, due 2020
Debt instrument, stated interest rate	3.83%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.45%, Series 2013A and 2013B, due 2022
Debt instrument, stated interest rate	4.45%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.84%, Series 2013A, 2013B and 2013C, due 2027
Debt instrument, stated interest rate	4.84%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 5.65%, Series 2013B and 2013C, due 2043
Debt instrument, stated interest rate	5.65%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.03%, Series 2012B, due 2020
Debt instrument, stated interest rate	4.03%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.55%, Series 2012B and 2012C, due 2023
Debt instrument, stated interest rate	4.55%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.72%, Series 2012D, due 2029
Debt instrument, stated interest rate	4.72%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 5.39%, Series 2012E, due 2042
Debt instrument, stated interest rate	5.39%
Hawaiian Electric Company, Inc. and Subsidiaries | Senior notes | 4.53%, Series 2012F, due 2032
Debt instrument, stated interest rate	4.53%
Hawaiian Electric Company, Inc. and Subsidiaries | Junior subordinated debt | 6.50 %, series 2004, Junior subordinated deferrable interest debentures, due 2034 - redeemed in 2019
Debt instrument, stated interest rate	6.50%
Hawaiian Electric Company, Inc. and Subsidiaries | Preferred Stock $20 Par Value
Preferred stock, par value (in dollars per share)	$ 20	$ 20
Preferred stock, Authorized shares	5,000,000	5,000,000
Hawaiian Electric Company, Inc. and Subsidiaries | Preferred Stock $100 Par Value
Preferred stock, par value (in dollars per share)	$ 100	$ 100
Preferred stock, Authorized shares	7,000,000	7,000,000
Hawaiian Electric | Series C, 4.25% Preferred Stock
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding	150,000	150,000
Preferred stock, stated dividend rate	4.25%	4.25%
Hawaiian Electric | Series D, 5.00% Preferred Stock
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding	50,000	50,000
Preferred stock, stated dividend rate	5.00%	5.00%
Hawaiian Electric | Series E, 5.00% Preferred Stock
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding	150,000	150,000
Preferred stock, stated dividend rate	5.00%	5.00%
Hawaiian Electric | Series H, 5.25% Preferred Stock
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding	250,000	250,000
Preferred stock, stated dividend rate	5.25%	5.25%
Hawaiian Electric | Series I, 5.00% Preferred Stock
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding	89,657	89,657
Preferred stock, stated dividend rate	5.00%	5.00%
Hawaiian Electric | Series J, 4.75% Preferred Stock
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding	250,000	250,000
Preferred stock, stated dividend rate	4.75%	4.75%
Hawaiian Electric | Series K, 4.65% Preferred Stock
Preferred stock, par value (in dollars per share)	$ 20
Shares outstanding	175,000	175,000
Preferred stock, stated dividend rate	4.65%	4.65%
Hawaii Electric Light | Series G, 7.625% Preferred Stock
Preferred stock, par value (in dollars per share)	$ 100
Shares outstanding	70,000	70,000
Preferred stock, stated dividend rate	7.625%	7.625%
Maui Electric | Series H, 7.625% Preferred Stock
Preferred stock, par value (in dollars per share)	$ 100
Shares outstanding	50,000	50,000
Preferred stock, stated dividend rate	7.625%	7.625%

Consolidated Statements of Ch_3

Consolidated Statements of Changes in Common Stock Equity - HECO - USD ($) $ in Thousands	Total	Retained earnings	Accumulated other comprehensive income (loss)	Hawaiian Electric Company, Inc. and Subsidiaries	Hawaiian Electric Company, Inc. and SubsidiariesCommon stock	Hawaiian Electric Company, Inc. and SubsidiariesPremium on capital stock	Hawaiian Electric Company, Inc. and SubsidiariesRetained earnings	Hawaiian Electric Company, Inc. and SubsidiariesAccumulated other comprehensive income (loss)
Beginning Balance at Dec. 31, 2016	$ 2,066,753	$ 438,972	$ (33,129)	$ 1,799,787	$ 106,818	$ 601,491	$ 1,091,800	$ (322)
Balance (in shares) at Dec. 31, 2016					16,020,000
Increase (decrease) in stockholders' equity
Net income for common stock	165,297	165,297		119,951			119,951
Other comprehensive income (loss), net of tax benefits	(1,372)		(1,372)	(688)				(688)
Reclass of AOCI for tax rate reduction impact1	(7,440)			(209)			209	(209)
Issuance of common stock, net of expenses				14,000	$ 816	13,184
Issuance of common stock, net of expenses (in shares)					122,000
Common stock dividends	(134,873)	(134,873)		(87,767)			(87,767)
Ending Balance at Dec. 31, 2017	2,097,386	476,836	(41,941)	1,845,283	$ 107,634	614,675	1,124,193	(1,219)
Balance (in shares) at Dec. 31, 2017					16,142,000
Increase (decrease) in stockholders' equity
Net income for common stock	201,774	201,774		143,653			143,653
Other comprehensive income (loss), net of tax benefits	(8,669)		(8,669)	1,318				1,318
Issuance of common stock, net of expenses				70,692	$ 4,062	66,630
Issuance of common stock, net of expenses (in shares)					609,000
Common stock dividends	(134,987)	(134,987)		(103,305)			(103,305)
Ending Balance at Dec. 31, 2018	$ 2,162,280	543,623	(50,610)	1,957,641	$ 111,696	681,305	1,164,541	99
Balance (in shares) at Dec. 31, 2018	108,879,245				16,751,000
Increase (decrease) in stockholders' equity
Net income for common stock	$ 217,882	217,882		156,840			156,840
Other comprehensive income (loss), net of tax benefits	30,571		30,571	(1,378)				(1,378)
Issuance of common stock, net of expenses				35,501	$ 1,982	33,519
Issuance of common stock, net of expenses (in shares)					297,000
Common stock dividends	(139,463)	(139,463)		(101,252)			(101,252)
Ending Balance at Dec. 31, 2019	$ 2,280,260	$ 622,042	$ (20,039)	$ 2,047,352	$ 113,678	$ 714,824	$ 1,220,129	$ (1,279)
Balance (in shares) at Dec. 31, 2019	108,973,328				17,048,000

Consolidated Statements of Ca_3

Consolidated Statements of Cash Flows - HECO - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net income	$ 219,772,000	$ 203,664,000	$ 167,187,000
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation of property, plant and equipment	229,858,000	214,036,000	200,658,000
Other amortization	48,255,000	41,593,000	21,340,000
Deferred income taxes	(15,085,000)	(9,368,000)	37,835,000
Allowance for equity funds used during construction	(11,987,000)	(10,877,000)	(12,483,000)
Other	10,822,000	(4,219,000)	(3,324,000)
Changes in assets and liabilities
Decrease (increase) in fuel oil stock	(11,493,000)	7,054,000	(20,794,000)
Decrease (increase) in regulatory assets	71,262,000	9,252,000	(17,256,000)
Change in prepaid and accrued income taxes, tax credits and revenue taxes	(27,538,000)	29,429,000	20,685,000
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability	(4,482,000)	20,871,000	882,000
Change in other assets and liabilities	(34,724,000)	15,488,000	(25,551,000)
Net cash provided by operating activities	512,470,000	499,312,000	420,441,000
Cash flows from investing activities
Capital expenditures	(457,520,000)	(537,369,000)	(495,187,000)
Other, net	13,292,000	14,534,000	7,487,000
Net cash used in investing activities	(541,709,000)	(792,059,000)	(815,299,000)
Cash flows from financing activities
Common stock dividends	(139,463,000)	(134,987,000)	(134,873,000)
Proceeds from issuance of long-term debt	289,349,000	250,000,000	532,325,000
Repayment of long-term debt and funds transferred for repayment of long-term debt	(287,285,000)	(53,887,000)	(465,000,000)
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less	86,718,000	(18,999,000)	67,992,000
Repayment of short-term debt	(50,000,000)	(50,000,000)	(75,000,000)
Other	(1,836,000)	(1,603,000)	(6,349,000)
Net cash used in financing activities	87,716,000	200,074,000	378,287,000
Net decrease in cash and equivalents	58,477,000	(92,673,000)	(16,571,000)
Cash, cash equivalents and restricted cash, January 1	169,208,000	261,881,000	278,452,000
Cash, cash equivalents and restricted cash, December 31	227,685,000	169,208,000	261,881,000
Less: Restricted cash	(30,872,000)	0	0
Cash and cash equivalents	196,813,000	169,208,000	261,881,000
Hawaiian Electric Company, Inc. and Subsidiaries
Cash flows from operating activities
Net income	158,835,000	145,648,000	121,946,000
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation of property, plant and equipment	215,731,000	203,626,000	192,784,000
Other amortization	29,631,000	26,602,000	8,498,000
Deferred income taxes	(16,284,000)	(7,982,000)	38,037,000
Income tax credits, net	27,259,000	(99,000)	(52,000)
State refundable credit	(8,369,000)	(6,239,000)	(2,251,000)
Allowance for equity funds used during construction	(11,987,000)	(10,877,000)	(12,483,000)
Other	200,000	4,768,000	1,237,000
Changes in assets and liabilities
Decrease (increase) in accounts receivable	20,956,000	(50,917,000)	2,914,000
Decrease (increase) in accrued unbilled revenues	4,511,000	(14,684,000)	(15,361,000)
Decrease (increase) in fuel oil stock	(12,002,000)	6,938,000	(20,443,000)
Increase in materials and supplies	(5,498,000)	(807,000)	(718,000)
Decrease (increase) in regulatory assets	71,262,000	9,252,000	(17,256,000)
Increase in regulatory liabilities	1,953,000	37,358,000	3,602,000
Increase (decrease) in accounts payable	(2,051,000)	24,358,000	25,734,000
Change in prepaid and accrued income taxes, tax credits and revenue taxes	(28,523,000)	25,036,000	29,862,000
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability	(4,448,000)	18,746,000	604,000
Change in other assets and liabilities	(17,220,000)	(17,114,000)	(21,468,000)
Net cash provided by operating activities	423,956,000	393,613,000	335,186,000
Cash flows from investing activities
Capital expenditures	(419,898,000)	(415,264,000)	(376,865,000)
Other, net	11,374,000	10,082,000	4,578,000
Net cash used in investing activities	(408,524,000)	(405,182,000)	(372,287,000)
Cash flows from financing activities
Common stock dividends	(101,252,000)	(103,305,000)	(87,767,000)
Preferred stock dividends of Hawaiian Electric and subsidiaries	(1,995,000)	(1,995,000)	(1,995,000)
Proceeds from issuance of common stock	35,500,000	70,700,000	14,000,000
Proceeds from issuance of long-term debt	280,000,000	100,000,000	315,000,000
Repayment of long-term debt and funds transferred for repayment of long-term debt	(283,546,000)	(50,000,000)	(265,000,000)
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less	38,987,000	(4,999,000)	4,999,000
Proceeds from issuance of short-term debt	75,000,000	25,000,000	0
Repayment of short-term debt	(50,000,000)	0	0
Other	(2,109,000)	(472,000)	(3,905,000)
Net cash used in financing activities	(9,415,000)	34,929,000	(24,668,000)
Net decrease in cash and equivalents	6,017,000	23,360,000	(61,769,000)
Cash, cash equivalents and restricted cash, January 1	35,877,000	12,517,000	74,286,000
Cash, cash equivalents and restricted cash, December 31	41,894,000	35,877,000	12,517,000
Less: Restricted cash	(30,872,000)	0	0
Cash and cash equivalents	$ 11,022,000	$ 35,877,000	$ 12,517,000

Summary of significant accounti

Summary of significant accounting policies	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Summary of significant accounting policies	Note 1 · Summary of significant accounting policies General Hawaiian Electric Industries, Inc. (HEI) is a holding company with direct and indirect subsidiaries principally engaged in electric utility, banking, and renewable/sustainable infrastructure investment businesses operating in the State of Hawaii . HEI owns Hawaiian Electric Company, Inc. (Hawaiian Electric), ASB Hawaii, Inc., an intermediate holding company that owns American Savings Bank, F.S.B. (ASB), and Pacific Current, LLC (Pacific Current). Pacific Current’s significant subsidiaries include Hamakua Energy, LLC (Hamakua Energy) and Mauo, LLC (Mauo). Hawaiian Electric and its wholly owned operating subsidiaries, Hawaii Electric Light Company, Inc. (Hawaii Electric Light) and Maui Electric Company, Limited (Maui Electric), are regulated public electric utilities (collectively, the Utilities) in the business of generating, purchasing, transmitting, distributing and selling electric energy on all major islands in Hawaii other than Kauai. See Note 2 . ASB is a federally chartered savings bank providing a full range of banking services to individual and business customers through its branch system in Hawaii. Hamakua Energy, owns and operates a 60 -megawatt (MW) combined-cycle power plant, which sells the power it produces only to Hawaii Electric Light. Mauo is a commercial-scale, solar-plus-storage project ( 8.6 MW of solar and 42.3 MW of storage) currently under construction on the islands of Oahu and Maui. Basis of presentation. In preparing the consolidated financial statements in conformity with accounting principles generally accepted in the United States of America (GAAP), management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities and the reported amounts of revenues and expenses. Actual results could differ significantly from those estimates. Material estimates that are particularly susceptible to significant change for HEI and its subsidiaries (collectively, the Company) include the amounts reported as fair value for investment securities (ASB only); pension and other postretirement benefit obligations; contingencies and litigation; income taxes; regulatory assets and liabilities (Utilities only); electric utility unbilled revenues (Utilities only); asset retirement obligations (Utilities only); and allowance for loan losses (ASB only). Consolidation. The HEI consolidated financial statements include the accounts of HEI and its subsidiaries. The Hawaiian Electric consolidated financial statements include the accounts of Hawaiian Electric and its subsidiaries. When HEI or Hawaiian Electric has a controlling financial interest in another entity (usually, majority voting interest), that entity is consolidated. Investments in companies over which the Company or the Utilities have the ability to exercise significant influence, but not control, are accounted for using the equity method. The consolidated financial statements exclude variable interest entities (VIEs) when the Company or the Utilities are not the primary beneficiaries. In general, significant intercompany amounts are eliminated in consolidation (see Note 2 for exceptions). Cash and cash equivalents. The Utilities consider cash on hand, deposits in banks, money market accounts, certificates of deposit, short-term commercial paper of non-affiliates and liquid investments (with original maturities of three months or less) to be cash and cash equivalents. The Company considers the same items to be cash and cash equivalents as well as ASB’s deposits with the Federal Home Loan Bank (FHLB), federal funds sold (excess funds that ASB loans to other banks overnight at the federal funds rate) and securities purchased under resale agreements with original maturities of three months or less. Additionally, ASB is required by the Federal Reserve System to maintain noninterest-bearing cash reserves equal to a percentage of certain deposits. The reserve requirement for ASB at December 31, 2019 and 2018 was $26.2 million and $28.1 million , respectively. Restricted cash. The Utilities consider funds on deposit with trustees, which represent the undrawn proceeds from the issuance of special purpose revenue bonds to be restricted cash because these funds are available only to finance (or reimburse payment of) approved capital expenditures. At December 31, 2019 and 2018 , total restricted cash of Utilities was $30.9 million and nil , respectively (see Note 6 ). Property, plant and equipment. Property, plant and equipment are reported at cost. Self-constructed electric utility plant includes engineering, supervision, administrative and general costs and an allowance for the cost of funds used during the construction period. These costs are recorded in construction in progress and are transferred to utility plant when construction is completed and the facilities are either placed in service or become useful for public utility purposes. Costs for betterments that make utility plant more useful, more efficient, of greater durability or of greater capacity are also capitalized. Upon the retirement or sale of electric utility plant, generally no gain or loss is recognized. The cost of the plant retired is charged to accumulated depreciation. Amounts collected from customers for cost of removal are included in regulatory liabilities. See discussion regarding “Utility projects” in Note 3 . Depreciation. Depreciation is computed primarily using the straight-line method over the estimated lives of the assets being depreciated. Electric utility plant additions in the current year are depreciated beginning January 1 of the following year in accordance with rate-making. Electric utility plant has lives ranging from 16 to 88 years for production plant, from 10 to 79 years for transmission and distribution plant and from 5 to 65 years for general plant. The Utilities’ composite annual depreciation rate, which includes a component for cost of removal, was 3.2% in 2019 , 2018 and 2017 . Retirement benefits. Pension and other postretirement benefit costs are charged primarily to expense and electric utility plant (in the case of the Utilities). Funding for the Company’s qualified pension plans (Plans) is based on actuarial assumptions adopted by the Pension Investment Committee administering the Plans. The participating employers contribute amounts to a master pension trust for the Plans in accordance with the funding requirements of the Employee Retirement Income Security Act of 1974, as amended (ERISA), including changes promulgated by the Pension Protection Act of 2006, and considering the deductibility of contributions under the Internal Revenue Code. The Company generally funds at least the net periodic pension cost during the year, subject to ERISA minimum and Internal Revenue Code limits and targeted funded status. Certain health care and/or life insurance benefits are provided to eligible retired employees and the employees’ beneficiaries and covered dependents. The Company generally funds the net periodic postretirement benefit costs other than pensions (except for executive life) for postretirement benefits other than pensions (OPEB), while maximizing the use of the most tax-advantaged funding vehicles, subject to cash flow requirements and reviews of the funded status with the consulting actuary. Environmental expenditures. The Company and the Utilities are subject to numerous federal and state environmental statutes and regulations. In general, environmental contamination treatment costs are charged to expense. Environmental costs are capitalized if the costs extend the life, increase the capacity, or improve the safety or efficiency of property; the costs mitigate or prevent future environmental contamination; or the costs are incurred in preparing the property for sale. Environmental costs are either capitalized or charged to expense when environmental assessments and/or remedial efforts are probable and the cost can be reasonably estimated. The Utilities review their sites and measure the liability quarterly by assessing a range of reasonably likely costs of each identified site using currently available information, including existing technology, presently enacted laws and regulations, experience gained at similar sites, and the probable level of involvement and financial condition of other potentially responsible parties. Income taxes. Deferred income tax assets and liabilities are established for the temporary differences between the financial reporting bases and the tax bases of the Company’s and the Utilities’ assets and liabilities at federal and state tax rates expected to be in effect when such deferred tax assets or liabilities are realized or settled. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Valuation allowances are established when necessary to reduce deferred income tax assets to the amount expected to be realized. HEI and the Utilities’ investment tax credits are deferred and amortized over the estimated useful lives of the properties to which the credits relate (and for the Utilities, this treatment is in accordance with Accounting Standards Codification (ASC) Topic 980, “Regulated Operations”). The Utilities are included in the consolidated income tax returns of HEI. However, income tax expense has been computed for financial statement purposes as if each utility filed a separate income tax return and Hawaiian Electric filed a consolidated Hawaiian Electric income tax return. Governmental tax authorities could challenge a tax return position taken by the Company. The Company and the Utilities use a “more-likely-than-not” recognition threshold and measurement standard for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. Fair value measurements. Fair value estimates are estimates of the price that would be received to sell an asset, or paid upon the transfer of a liability, in an orderly transaction between market participants at the measurement date. The fair value estimates are generally determined based on assumptions that market participants would use in pricing the asset or liability and are based on market data obtained from independent sources. However, in certain cases, the Company and the Utilities use their own assumptions about market participant assumptions based on the best information available in the circumstances. These valuations are estimates at a specific point in time, based on relevant market information, information about the financial instrument and judgments regarding future expected loss experience, economic conditions, risk characteristics of various financial instruments and other factors. These estimates do not reflect any premium or discount that could result if the Company or the Utilities were to sell its entire holdings of a particular financial instrument at one time. Because no active trading market exists for a portion of the Company’s and the Utilities’ financial instruments, fair value estimates cannot be determined with precision. Changes in the underlying assumptions used, including discount rates and estimates of future cash flows, could significantly affect the estimates. In addition, the tax ramifications related to the realization of the unrealized gains and losses could have a significant effect on fair value estimates, but have not been considered in making such estimates. The Company and the Utilities group their financial assets measured at fair value in three levels outlined as follows: Level 1: Inputs to the valuation methodology are quoted prices, unadjusted, for identical assets or liabilities in active markets. A quoted price in an active market provides the most reliable evidence of fair value and is used to measure fair value whenever available. Level 2: Inputs to the valuation methodology include quoted prices for similar assets or liabilities in active markets; inputs to the valuation methodology include quoted prices for identical or similar assets or liabilities in markets that are not active; or inputs to the valuation methodology that are derived principally from or can be corroborated by observable market data by correlation or other means. Level 3: Inputs to the valuation methodology are unobservable and significant to the fair value measurement. Level 3 assets and liabilities include financial instruments whose value is determined using discounted cash flow methodologies, as well as instruments for which the determination of fair value requires significant management judgment or estimation. Classification in the hierarchy is based upon the lowest level input that is significant to the fair value measurement of the asset or liability. For instruments classified in Level 1 and 2 where inputs are primarily based upon observable market data, there is less judgment applied in arriving at the fair value. For instruments classified in Level 3, management judgment is more significant due to the lack of observable market data. Fair value is also used on a nonrecurring basis to evaluate certain assets for impairment or for disclosure purposes. Examples of nonrecurring uses of fair value include mortgage servicing rights accounted for by the amortization method, loan impairments for certain loans, real estate acquired in settlement of loans, goodwill and asset retirement obligations (AROs). Earnings per share (HEI only). Basic earnings per share (EPS) is computed by dividing net income for common stock by the weighted-average number of common shares outstanding for the period. Diluted EPS is computed similarly, except that dilutive common shares for stock compensation is added to the denominator. There were no shares of antidilutive securities outstanding during the years ended December 31, 2019, 2018 and 2017. Impairment of long-lived assets and long-lived assets to be disposed of. The Company and the Utilities review long-lived assets and certain identifiable intangibles for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to future undiscounted net cash flows expected to be generated by the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. Assets to be disposed of are reported at the lower of the carrying amount or fair value, less costs to sell. Recent accounting pronouncements. Leases . In February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-02, “Leases (Topic 842),” which requires that lessees recognize a liability to make lease payments (the lease liability) and a right-of-use (ROU) asset, representing its right to use the underlying asset for the lease term, for all leases (except short-term leases) at the commencement date. For finance leases, a lessee is required to recognize interest on the lease liability separately from amortization of the ROU asset in the consolidated statements of income. For operating leases, a lessee is required to recognize a single lease cost, calculated so that the cost of the lease is allocated over the lease term on a generally straight-line basis. The Company adopted ASU No. 2016-02 on January 1, 2019 and used the effective date as the date of initial application. Consequently, financial information for dates and periods before January 1, 2019 will not be updated and the disclosures required under the new standard will not be provided (i.e., the Company will continue to report prior comparative periods presented in the financial statements under Accounting Standards Codification (ASC) 840, including the required disclosures under ASC 840). The most significant effect of the new standard relates to the recognition of new ROU assets and lease liabilities on the Company’s balance sheet for purchase power agreements and real estate operating leases. On adoption, the Company recognized additional lease liabilities of approximately $257 million for the Company and approximately $236 million for the Utilities ( $215 million related to PPAs), based on the present value of the remaining minimum rental payments, with corresponding ROU assets for existing operating leases, under current leasing standards. In determining the lease liability upon transition, the Company used the incremental borrowing rates as of the adoption date based on the remaining lease term and remaining lease payments. See Note 8 for more information. Credit losses . In June 2016, the FASB issued ASU No. 2016-13, “ Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments ,” which is intended to improve financial reporting by requiring timelier recording of credit losses on loans and other financial instruments held by financial institutions and other organizations . ASU No. 2016-13 requires the measurement of all expected credit losses for financial assets held at the reporting date (based on historical experience, current conditions and reasonable and supportable forecasts) and enhanced disclosures to help financial statement users better understand significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. In addition, ASU No. 2016-13 amends the accounting for credit losses on available-for-sale (AFS) debt securities and purchased financial assets with credit deterioration. The other-than-temporary impairment model of accounting for credit losses on AFS debt securities will be replaced with an estimate of expected credit losses only when the fair value is below the amortized cost of the asset. The length of time the fair value of an AFS debt security has been below the amortized cost will no longer impact the determination of whether a credit loss exists. The AFS debt security model will also require the use of an allowance to record the estimated losses (and subsequent recoveries). The Company and Utilities will adopt ASU No. 2016-13 using an effective date of January 1, 2020 and will apply the guidance using a modified retrospective basis with the cumulative effect of initially applying the amendments to be recognized in retained earnings as of January 1, 2020. The allowance for credit losses (ACL) is a material estimate of the Company. As a result of the change from an incurred loss model to a methodology that considers the credit loss over the expected life of the loan, the Company expects to record, upon completing its final analysis, an adjustment between $18 million to $22 million to increase the ACL, with a corresponding adjustment to reduce retained earnings as of January 1, 2020. The ACL is based on the composition, characteristics and quality of the loans and off balance sheet credit exposures as well as the prevailing economic conditions as of the adoption date. The increase to the ACL for the loan portfolio will result in a decrease to retained earnings and regulatory capital amounts and ratios. However, ASB expects to remain well capitalized under the regulatory framework after the adoption of ASU No. 2016-13. Based on the credit quality of the Company’s existing held-to-maturity and AFS investment securities portfolio, the Company will not recognize an ACL at adoption for those investments. The adoption of the new standard did not have a material impact to the Utilities’ customer and other accounts receivables and accrued unbilled revenue. Compensation-retirement benefits-defined benefit plans . In August 2018, the FASB issued ASU No. 2018-14, “Compensation-Retirement Benefits-Defined Benefit Plans-General (Subtopic 715-20): Disclosure Framework-Changes to the Disclosure Requirements for Defined Benefit Plans,” which makes minor changes to the disclosure requirements for employers that sponsor defined benefit pension and/or other postretirement benefit plans. The new guidance eliminates requirements for certain disclosures that are no longer considered cost beneficial and requires new ones that the FASB considers pertinent. ASU No. 2018-14 is effective for fiscal years ending after December 15, 2020 . The Company early adopted ASU No. 2018-14, effective for the year ended December 31, 2019, and applied the amended disclosure requirements to all periods presented. See Note 10 for additional information regarding the Company’s employee benefit plans. Codification Improvements . In April 2019, the FASB issued ASU No. 2019-04, “Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments,” which is intended to clarify certain issues related to the accounting for financial instruments. • With respect to Topic 326, Financial Instruments - Credit Losses , ASU No. 2019-04 allows entities to measure the allowance for credit losses on accrued interest receivable balances separately from other components of the amortized cost basis of associated financial assets, or to make an accounting policy election not to measure an allowance for credit losses on accrued interest receivable amounts if an entity writes off the uncollectible accrued interest receivable balance in a timely manner and makes certain disclosures. ASU No. 2019-04 also allows an entity to make an accounting policy election regarding the presentation and disclosure of accrued interest receivables and the related allowance for credit losses for those accrued interest receivables. ASU No. 2019-04 also clarifies certain issues related to transfers between classifications or categories for loans and debt securities, recoveries, variable interest rates and prepayments, vintage disclosures, and contractual extensions and renewal options. • With respect to Topic 815, Derivatives and Hedging , ASU No. 2019-04 provides amendments, among others, that address partial-term fair value hedges, fair value hedge basis adjustments, and certain transition requirements. • With respect to Topic 825, Financial Instruments , ASU No. 2019-04 clarifies the scope of the guidance and disclosure requirements with respect to recognizing and measuring financial instruments. The amended guidance in ASU No. 2019-04 is effective for fiscal years and interim periods beginning after December 15, 2019, with early adoption permitted. The Company adopted ASU No. 2019-04 in the first quarter of 2020 and the impact of the ASU on the Company’s consolidated financial statements was not material. Reclassifications. Certain reclassifications have been made to prior years’ financial statements to conform to the 2019 presentation, which did not affect previously reported results of operations. Electric utility Regulation by the Public Utilities Commission of the State of Hawaii (PUC). The Utilities are regulated by the PUC and account for the effects of regulation under FASB ASC Topic 980, “Regulated Operations.” As a result, the Utilities’ financial statements reflect assets, liabilities, revenues and expenses based on current cost-based rate-making regulations (see Note 3—“Regulatory assets and liabilities”). Their continued accounting under ASC Topic 980 generally requires that rates are established by an independent, third-party regulator; rates are designed to recover the costs of providing service; and it is reasonable to assume that rates can be charged to, and collected from, customers. The rate schedules of the Utilities include energy costs recovery clauses (ECRCs) under which electric rates are adjusted for changes in the weighted-average price paid for fuel oil and certain components of purchased power, and the relative amounts of company-generated power and purchased power. The rate schedules also include purchased power adjustment clauses (PPACs) under which the remaining purchase power expenses are recovered through surcharge mechanisms. The amounts collected through the ECRCs and PPACs are required to be reconciled quarterly. Accounts receivable. Accounts receivable are recorded at the invoiced amount. The Utilities generally assess a late payment charge on balances unpaid from the previous month. The allowance for doubtful accounts is the Utilities’ best estimate of the amount of probable credit losses in the Utilities’ existing accounts receivable. At December 31, 2019 and 2018 , the allowance for customer accounts receivable, accrued unbilled revenues and other accounts receivable was $1.4 million and $1.5 million , respectively. Electric utility revenues. Revenues related to electric service are generally recorded when service is rendered and include revenues applicable to energy consumed in the accounting period but not yet billed to the customers. The Utilities also record revenue under a decoupling mechanism. See “ Decoupling” discussion in Note 3 - Electric Utility segment. Repairs and maintenance costs. Repairs and maintenance costs for overhauls of generating units are generally expensed as they are incurred. Allowance for funds used during construction (AFUDC). AFUDC is an accounting practice whereby the costs of debt and equity funds used to finance plant construction are credited on the statement of income and charged to construction in progress on the balance sheet. If a project under construction is delayed for an extended period of time, AFUDC on the delayed project may be stopped after assessing the causes of the delay and probability of recovery. The weighted-average AFUDC rate was 7.4% in 2019 , 7.3% in 2018 and 7.7% in 2017 , and reflected quarterly compounding. Bank (HEI only) Investment securities. Investments in debt securities are classified as held-to-maturity (HTM), trading or available-for-sale (AFS). ASB determines the appropriate classification at the time of purchase. Debt securities that ASB intends to and has the ability to hold to maturity are classified as HTM securities and reported at amortized cost. Marketable debt securities that are bought and held principally for the purpose of selling them in the near term are classified as trading securities and reported at fair value, with unrealized gains and losses included in earnings. Marketable debt securities not classified as either HTM or trading securities are classified as AFS and reported at fair value. Unrealized gains and losses for AFS securities are excluded from earnings and reported on a net basis in accumulated other comprehensive income (AOCI) until realized. Interest income is recorded on an accrual basis. Discounts and premiums on securities are accreted or amortized into interest income using the interest method over the remaining contractual lives of the agency obligation securities and the estimated lives of the mortgage-backed securities adjusted for anticipated prepayments. ASB uses actual prepayment experience and estimates of future prepayments to determine the constant effective yield necessary to apply the interest method of income recognition. The discounts and premiums on the agency obligations portfolio are accreted or amortized on a prospective basis using expected contractual cash flows. The discounts and premiums on the mortgage-backed securities portfolio are accreted or amortized on a retrospective basis using changes in anticipated prepayments. This method requires a retrospective adjustment of the effective yield each time ASB changes the estimated life as if the new estimate had been known since the original acquisition date of the securities. Estimates of future prepayments are based on the underlying collateral characteristics and historic or projected prepayment behavior of each security. The specific identification method is used in determining realized gains and losses on the sales of securities. For securities that are not trading securities, individual securities are assessed for impairment at least on a quarterly basis, and more frequently when economic or market conditions warrant. A security is impaired if the fair value of the security is less than its carrying value at the financial statement date. When a security is impaired, ASB determines whether this impairment is temporary or other-than-temporary. If ASB does not expect to recover the entire amortized cost basis of the security or there is a change in the expected cash flows, an OTTI exists. If ASB intends to sell the security, or will more likely than not be required to sell the security before recovery of its amortized cost, the OTTI must be recognized in earnings. If ASB does not intend to sell the security, and it is not more likely than not that ASB will be required to sell the security before recovery of its amortized cost, the OTTI must be separated into the amount representing the credit loss and the amount related to all other factors. The amount of OTTI related to the credit loss is recognized in earnings, while the remaining OTTI is recognized in AOCI. Based on ASB’s evaluation as of December 31, 2019 , 2018 and 2017 , there was no indicated impairment as ASB expects to collect the contractual cash flows for these investments. Stock in Federal Home Loan Bank (FHLB) is carried at cost and is reviewed at least quarterly for impairment, with valuation adjustments recognized in noninterest income. Loans . ASB carries loans at amortized cost less the allowance for loan losses, loan origination fees (net of direct loan origination costs), commitment fees and purchase premiums and discounts. Interest on loans is credited to income as it is earned. Discounts and premiums are accreted or amortized over the life of the loans using the interest method. Loan origination fees (net of direct loan origination costs) are deferred and recognized as an adjustment in yield over periods not exceeding the contractual life of the loan using the interest method or taken into income when the loan is paid off or sold. Nonrefundable commitment fees (net of direct loan origination costs, if applicable) received for commitments to originate or purchase loans are deferred and, if the commitment is exercised, recognized as an adjustment of yield over the life of the loan using the interest method. Nonrefundable commitment fees received for which the commitment expires unexercised are recognized as income upon expiration of the commitment. Loans held for sale are stated at the lower of cost or estimated fair value on an aggregate basis. Premiums, discounts and net deferred loan fees are not amortized while a loan is classified as held for sale. A sale is recognized only when the consideration received is other than beneficial interests in the assets sold and control over the assets is transferred irrevocably to the buyer. Gains or losses on sales of loans are recognized at the time of sale and are determined by the difference between the net sales proceeds and the allocated basis of the loans sold. Allowance for loan losses. ASB maintains an allowance for loan losses to absorb losses inherent in its loan portfolio. The level of allowance for loan losses is based on a continuing assessment of existing risks in the loan portfolio, historical loss experience, changes in collateral values and current conditions (e.g., economic conditions, real estate market conditions and interest rate environment). The allowance for loan losses is allocated to loan types using both a formula-based approach applied to groups of loans and an analysis of certain individual loans for impairment. The formula-based approach emphasizes loss factors primarily derived from actual historical default and loss rates, which are combined with an assessment of certain qualitative factors to determine the allowance amounts allocated to the various loan categories. Adverse changes in any of these factors could result in higher charge-offs and provision for loan losses. ASB disaggregates its portfolio loans into portfolio segments for purposes of determining the allowance for loan losses. Commercial, commercial real estate, and commercial construction loans are defined as non-homogeneous loans and ASB utilizes a risk rating system for evaluating the credit quality of the loans. Non-homogeneous loans are also categorized into the regulatory asset quality classifications—Pass, Special Mention, Substandard, Doubtful, and Loss based on credit quality. ASB utilizes a numerical-bas

Segment financial information

Segment financial information	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
Segment financial information	Note 2 · Segment financial information The electric utility and bank segments are strategic business units of the Company that offer different products and services and operate in different regulatory environments. The accounting policies of the segments are the same as those described for the Company in the summary of significant accounting policies, except as otherwise indicated and except that federal and state income taxes for each segment are calculated on a “stand-alone” basis. HEI evaluates segment performance based on net income. Each segment accounts for intersegment sales and transfers as if the sales and transfers were to third parties (i.e., at current market prices). Intersegment revenues consist primarily of Hamakua Energy revenues, interest, rent and preferred stock dividends. Electric utility Hawaiian Electric and its wholly owned operating subsidiaries, Hawaii Electric Light and Maui Electric, are public electric utilities in the business of generating, purchasing, transmitting, distributing and selling electric energy on all major islands in Hawaii other than Kauai, and are regulated by the PUC. The utility subsidiaries are aggregated within the electric utility segment because they: (1) are involved in the business of supplying electric energy in the same geographical location (i.e., the State of Hawaii), (2) have similar production processes that comprise electric generation, (3) serve similar customers within their franchise territories (e.g., residential, commercial and industrial customers), (4) use similar electric grids to distribute the energy to their customers, (5) are regulated by the PUC and undergo similar rate-making processes, (6) have similar economic characteristics and (7) perform financial reporting oversight and management of the business at the consolidated level. Bank ASB is a federally chartered savings bank that provides a full range of banking services to individual and business customers through its branch system in Hawaii. ASB is subject to examination and comprehensive regulation by the Office of the Comptroller of the Currency (OCC) and the Federal Deposit Insurance Corporation (FDIC), and is subject to reserve requirements established by the Board of Governors of the Federal Reserve System. Other “Other” includes amounts for the holding companies (HEI and ASB Hawaii, Inc.), Pacific Current, and other subsidiaries not qualifying as reportable segments, and intercompany eliminations. Pacific Current. Pacific Current was formed in September 2017 to focus on investing in non-regulated renewable energy and sustainable infrastructure in the State of Hawaii to help achieve the state’s sustainability goals. Significant investments of Pacific Current made through its subsidiaries, Hamakua Energy, LLC and Mauo, LLC, include: Hamakua power plant . On November 24, 2017, Hamakua Energy, LLC acquired Hamakua Energy Partners, L.P.’s 60 -MW combined cycle power plant and other assets from affiliates of ArcLight Capital Partners, a private equity firm. The plant sells all the power it produces to Hawaii Electric Light under an existing power purchase agreement (PPA) that expires in 2030. Solar + Storage Power Purchase Agreement (PPA) . On February 2, 2018, Mauo, LLC executed definitive agreements to acquire a solar-plus-storage PPA for a multi-site, commercial-scale project that will provide 8.6 MW of solar capacity and 42.3 MWH of storage capacity on the islands of Maui and Oahu. The PPA has a 15 -year term with an option to extend for an additional five years . The system is currently being constructed by a third party contractor under an Engineering, Procurement and Construction (EPC) contract that was contemporaneously negotiated and executed by Mauo, LLC. The EPC contract provides a fixed price for the purchase of the completed system, a project completion schedule and performance obligations designed to match the requirements of the PPA. Mauo, LLC is funding the construction of the project with a construction facility that will be repaid at the commercial operation date (ultimately with cash from investment tax credits, state renewable tax credits, non-recourse project debt, and equity). There are five separate project sites, which are expected to be placed into service during 2020. Segment financial information was as follows: (in thousands) Electric utility Bank Other Total 2019 Revenues from external customers $ 2,545,865 $ 328,570 $ 166 $ 2,874,601 Intersegment revenues (eliminations) 77 — (77 ) — Revenues 2,545,942 328,570 89 2,874,601 Depreciation and amortization 245,362 28,675 4,076 278,113 Interest expense, net 70,842 18,440 20,057 109,339 Income (loss) before income taxes 197,140 112,034 (37,765 ) 271,409 Income taxes (benefit) 38,305 23,061 (9,729 ) 51,637 Net income (loss) 158,835 88,973 (28,036 ) 219,772 Preferred stock dividends of subsidiaries 1,995 — (105 ) 1,890 Net income (loss) for common stock 156,840 88,973 (27,931 ) 217,882 Capital expenditures 419,898 24,175 13,447 457,520 Assets (at December 31, 2019) 6,388,682 7,233,017 123,552 13,745,251 2018 Revenues from external customers $ 2,546,472 $ 314,275 $ 102 $ 2,860,849 Intersegment revenues (eliminations) 53 — (53 ) — Revenues 2,546,525 314,275 49 2,860,849 Depreciation and amortization 230,228 21,443 3,958 255,629 Interest expense, net 73,348 15,539 15,329 104,216 Income (loss) before income taxes 180,426 106,578 (32,543 ) 254,461 Income taxes (benefit) 34,778 24,069 (8,050 ) 50,797 Net income (loss) 145,648 82,509 (24,493 ) 203,664 Preferred stock dividends of subsidiaries 1,995 — (105 ) 1,890 Net income (loss) for common stock 143,653 82,509 (24,388 ) 201,774 Capital expenditures 1 415,264 72,666 18,840 537,369 Assets (at December 31, 2018) 5,967,503 7,027,894 108,654 13,104,051 2017 Revenues from external customers $ 2,257,455 $ 297,640 $ 530 $ 2,555,625 Intersegment revenues (eliminations) 111 — (111 ) — Revenues 2,257,566 297,640 419 2,555,625 Depreciation and amortization 201,282 19,416 1,300 221,998 Interest expense, net 69,637 12,156 9,335 91,128 Income (loss) before income taxes 205,145 98,716 (27,281 ) 276,580 Income taxes (benefit) 83,199 31,719 (5,525 ) 109,393 Net income (loss) 121,946 66,997 (21,756 ) 167,187 Preferred stock dividends of subsidiaries 1,995 — (105 ) 1,890 Net income (loss) for common stock 119,951 66,997 (21,651 ) 165,297 Capital expenditures 1 376,865 53,272 317 495,187 Assets (at December 31, 2017) 5,630,613 6,798,659 104,888 12,534,160 1 Contributions in aid of construction balances are included in capital expenditures. Intercompany electricity sales of the Utilities to ASB and “other” segments are not eliminated because those segments would need to purchase electricity from another source if it were not provided by the Utilities and the profit on such sales is nominal. Bank fees that ASB charges the Utilities and “other” segments are not eliminated because those segments would pay fees to another financial institution if they were to bank with another institution and the profit on such fees is nominal. Hamakua Energy’s sales to Hawaii Electric Light (a regulated affiliate) are eliminated in consolidation.

Electric utility segment

Electric utility segment	12 Months Ended
	Dec. 31, 2019
Electric utility subsidiary
Electric utility segment	Note 3 · Electric utility segment Regulatory assets and liabilities. Regulatory assets represent deferred costs and accrued decoupling revenues which are expected to be recovered through rates over PUC-authorized periods. Generally, the Utilities do not earn a return on their regulatory assets; however, they have been allowed to recover interest on certain regulatory assets and to include certain regulatory assets in rate base. Regulatory liabilities represent amounts included in rates and collected from ratepayers for costs expected to be incurred in the future, or amounts collected in excess of costs incurred that are refundable to customers. For example, the regulatory liability for cost of removal in excess of salvage value represents amounts that have been collected from ratepayers for costs that are expected to be incurred in the future to retire utility plant. Generally, the Utilities include regulatory liabilities in rate base or are required to apply interest to certain regulatory liabilities. In the table below, noted in parentheses are the original PUC authorized amortization or recovery periods and, if different, the remaining amortization or recovery periods as of December 31, 2019 are noted. Regulatory assets were as follows: December 31 2019 2018 (in thousands) Retirement benefit plans (balance primarily varies with plans’ funded statuses) $ 554,485 $ 624,126 Income taxes (1-55 years) 102,612 114,076 Decoupling revenue balancing account and RAM (1-2 years) — 49,560 Unamortized expense and premiums on retired debt and equity issuances (1-20 years; 1-19 years remaining) 10,228 10,065 Vacation earned, but not yet taken (1 year) 12,535 10,820 Other (1-39 years remaining) 35,220 24,779 Total regulatory assets $ 715,080 $ 833,426 Included in: Current assets $ 30,710 $ 71,016 Long-term assets 684,370 762,410 Total regulatory assets $ 715,080 $ 833,426 Regulatory liabilities were as follows: December 31 2019 2018 (in thousands) Cost of removal in excess of salvage value (1-60 years) $ 521,977 $ 491,006 Income taxes (1-55 years) 386,990 413,339 Decoupling revenue balancing account and RAM (1-2 years) 16,370 — Retirement benefit plans (balance primarily varies with plans’ funded statuses) 21,707 19,129 Other (1-19 years remaining) 25,266 26,762 Total regulatory liabilities $ 972,310 $ 950,236 Included in: Current liabilities $ 30,724 $ 17,977 Long-term liabilities 941,586 932,259 Total regulatory liabilities $ 972,310 $ 950,236 The regulatory asset and liability relating to retirement benefit plans was recorded as a result of pension and OPEB tracking mechanisms adopted by the PUC in rate case decisions for the Utilities in 2007 (see Note 10 ). Major customers. The Utilities received 11% ( $281 million ), 11% ( $273 million ) and 11% ( $239 million ) of their operating revenues from the sale of electricity to various federal government agencies in 2019 , 2018 and 2017 , respectively. Cumulative preferred stock. The following series of cumulative preferred stock are redeemable only at the option of the respective company at the following prices in the event of voluntary liquidation or redemption: December 31, 2019 Voluntary liquidation price Redemption price Series C, D, E, H, J and K (Hawaiian Electric) $ 20 $ 21 I (Hawaiian Electric) 20 20 G (Hawaii Electric Light) 100 100 H (Maui Electric) 100 100 Hawaiian Electric is obligated to make dividend, redemption and liquidation payments on the preferred stock of each of its subsidiaries if the respective subsidiary is unable to make such payments, but this obligation is subordinated to Hawaiian Electric’s obligation to make payments on its own preferred stock. Related-party transactions. HEI charged the Utilities $ 6.0 million , $5.9 million and $6.2 million for general management and administrative services in 2019 , 2018 and 2017 , respectively. The amounts charged by HEI to its subsidiaries for services provided by HEI employees are allocated primarily on the basis of time expended in providing such services. For the years ended December 31, 2019 and December 31, 2018 , Hamakua Energy, LLC (an indirect subsidiary of HEI) sold energy and capacity to Hawaii Electric Light (subsidiary of Hawaiian Electric and indirect subsidiary of HEI) under a PPA in the amount of $68 million and $56 million , respectively. Hawaiian Electric’s short-term borrowings from HEI totaled nil at December 31, 2019 and 2018 . Borrowings among the Utilities are eliminated in consolidation. Interest charged by HEI to Hawaiian Electric was not material for the years ended December 31, 2019 and 2018 . HECO Capital Trust III. Trust III, a wholly-owned unconsolidated subsidiary of Hawaiian Electric, was created and exists for the exclusive purposes of (i) issuing in March 2004 2,000,000 6.50% Cumulative Quarterly Income Preferred Securities, Series 2004 (2004 Trust Preferred Securities) ( $50 million aggregate liquidation preference) to the public and trust common securities ( $1.5 million aggregate liquidation preference) to Hawaiian Electric, (ii) investing the proceeds of these trust securities in 2004 Debentures issued by Hawaiian Electric in the principal amount of $31.5 million and issued by Hawaii Electric Light and Maui Electric each in the principal amount of $10 million , (iii) making distributions on these trust securities and (iv) engaging in only those other activities necessary or incidental thereto. On May 15, 2019, Trust III redeemed $50 million of its outstanding 2004 Trust Preferred Securities and $1.5 million of trust common securities. Subsequently a Certificate of Cancellation of Statutory Trust was filed with the Delaware Secretary of State in order to cancel the Trust III, which became effective on June 10, 2019. For the year-to-date period ending on the Trust’s cancellation date on June 10, 2019, Trust III’s income statement consisted of $1.2 million of interest income received from the 2004 Debentures; $1.2 million of distributions to holders of the Trust Preferred Securities; and $37,000 of common dividends on the trust common securities to Hawaiian Electric. Unconsolidated variable interest entities. Power purchase agreements . As of December 31, 2019 , the Utilities had four PPAs for firm capacity (excluding the PGV PPA as Puna Geothermal Venture (PGV) has been offline since May 2018 due to lava flow on Hawaii Island) and other PPAs with independent power producers (IPPs) and Schedule Q providers (i.e., customers with cogeneration and/or power production facilities who buy power from or sell power to the Utilities), none of which are currently required to be consolidated as VIEs. Pursuant to the current accounting standards for VIEs, the Utilities are deemed to have a variable interest in Kalaeloa Partners, L.P. (Kalaeloa), AES Hawaii, Inc. (AES Hawaii) and Hamakua Energy by reason of the provisions of the PPA that the Utilities have with the three IPPs. However, management has concluded that the Utilities are not the primary beneficiary of Kalaeloa, AES Hawaii and Hamakua Energy because the Utilities do not have the power to direct the activities that most significantly impact the three IPPs’ economic performance nor the obligation to absorb their expected losses, if any, that could potentially be significant to the IPPs. Thus, the Utilities have not consolidated Kalaeloa, AES Hawaii and Hamakua Energy in its consolidated financial statements. Hamakua Energy is an indirect subsidiary of Pacific Current, and is consolidated in HEI’s consolidated financial statements. For the other PPAs with IPPs, the Utilities have concluded that the consolidation of the IPPs was not required because either the Utilities do not have variable interests in the IPPs due to the absence of an obligation in the PPAs for the Utilities to absorb any variability of the IPPs, or the IPP was considered a “governmental organization,” and thus excluded from the scope of accounting standards for VIEs. Two IPPs of as-available energy declined to provide the information necessary for Utilities to determine the applicability of accounting standards for VIEs. If information is ultimately received from the IPPs, a possible outcome of future analyses of such information is the consolidation of one or both of such IPPs in the Consolidated Financial Statements. The consolidation of any significant IPP could have a material effect on the Consolidated Financial Statements, including the recognition of a significant amount of assets and liabilities and, if such a consolidated IPP were operating at a loss and had insufficient equity, the potential recognition of such losses. If the Utilities determine they are required to consolidate the financial statements of such an IPP and the consolidation has a material effect, the Utilities would retrospectively apply accounting standards for VIEs to the IPP. Commitments and contingencies. Contingencies . The Utilities are subject in the normal course of business to pending and threatened legal proceedings. Management does not anticipate that the aggregate ultimate liability arising out of these pending or threatened legal proceedings will be material to its financial position. However, the Utilities cannot rule out the possibility that such outcomes could have a material effect on the results of operations or liquidity for a particular reporting period in the future. Power purchase agreements . Purchases from all IPPs were as follows: Years ended December 31 2019 2018 2017 (in millions) Kalaeloa $ 214 $ 216 $ 180 AES Hawaii 139 140 140 HPOWER 76 69 67 Puna Geothermal Venture — 15 38 Hamakua Energy 68 56 35 Wind IPPs 95 107 97 Solar IPPs 36 29 27 Other IPPs 1 5 7 3 Total IPPs $ 633 $ 639 $ 587 1 Includes hydro power and other PPAs As of December 31, 2019 , the Utilities had four firm capacity PPAs for a total of 516.5 megawatts (MW) of firm capacity. Since May 2018, PGV facility with 34.6 MW of firm capacity has been offline due to lava flow on Hawaii Island. The PUC allows rate recovery for energy and firm capacity payments to IPPs under these agreements. Assuming that each of the agreements remains in place for its current term (and as amended) and the minimum availability criteria in the PPAs are met, aggregate minimum fixed capacity charges are expected to be approximately $51 million in 2020 , $38 million each in 2021, 2022 , 2023 and 2024 , and $241 million from 2025 through 2033. In general, the Utilities base their payments under the PPAs upon available capacity and actual energy supplied and they are generally not required to make payments for capacity if the contracted capacity is not available, and payments are reduced, under certain conditions, if available capacity drops below contracted levels. In general, the payment rates for capacity have been predetermined for the terms of the agreements. Energy payments will vary over the terms of the agreements. The Utilities pass on changes in the fuel component of the energy charges to customers through the ECRC in their rate schedules. The Utilities do not operate, or participate in the operation of, any of the facilities that provide power under the agreements. Title to the facilities does not pass to Hawaiian Electric or its subsidiaries upon expiration of the agreements, and the agreements do not contain bargain purchase options for the facilities. Purchase power adjustment clause. The PUC has approved purchased power adjustment clauses (PPACs) for the Utilities. Purchased power capacity, O&M and other non-energy costs previously recovered through base rates are now recovered in the PPACs and, subject to approval by the PUC, such costs resulting from new purchased power agreements can be added to the PPACs outside of a rate case. Purchased energy costs continue to be recovered through the ECRC. Kalaeloa Partners, L.P. Under a 1988 PPA, as amended, Hawaiian Electric is committed to purchase 208 MW of firm capacity from Kalaeloa. Hawaiian Electric and Kalaeloa are currently in negotiations to address the PPA term that ended on May 23, 2016. The PPA automatically extends on a month-to-month basis as long as the parties are still negotiating in good faith. Hawaiian Electric and Kalaeloa have agreed that neither party will terminate the PPA (which has been subject to automatic extension on a month-to-month basis) prior to July 31, 2020, to allow for a negotiated resolution and PUC approval. AES Hawaii, Inc. Under a PPA entered into in March 1988, as amended (through Amendment No. 2) for a period of 30 years ending September 2022, Hawaiian Electric agreed to purchase 180 MW of firm capacity from AES Hawaii. Hawaiian Electric and AES Hawaii have been in dispute over an additional 9 MW of capacity. In February 2018, Hawaiian Electric reached agreement with AES Hawaii on an amendment to the PPA. However, in June 2018, the PUC issued an order suspending review of the amendment pending a DOH decision on AES Hawaii’s request for approval of its Emission Reduction Plan and partnership with Hawaiian Electric. If approved by the PUC, the amendment will resolve AES Hawaii’s claims related to the additional capacity. Hu Honua Bioenergy, LLC (Hu Honua). In May 2012, Hawaii Electric Light signed a PPA, which the PUC approved in December 2013, with Hu Honua for 21.5 MW of renewable, dispatchable firm capacity fueled by locally grown biomass from a facility on the island of Hawaii. Under the terms of the PPA, the Hu Honua plant was scheduled to be in service in 2016. However, Hu Honua encountered construction and litigation delays, which resulted in an amended and restated PPA between Hawaii Electric Light and Hu Honua dated May 5, 2017. In July 2017, the PUC approved the amended and restated PPA, which becomes effective once the PUC’s order is final and non-appealable. In August 2017, the PUC’s approval was appealed by a third party. On May 10, 2019, the Hawaii Supreme Court issued a decision remanding the matter to the PUC for further proceedings consistent with the court’s decision which must include express consideration of Green House Gas emissions that would result from approving the PPA, whether the cost of energy under the PPA is reasonable in light of the potential for GHG emissions, and whether the terms of the PPA are prudent and in the public interest, in light of its potential hidden and long-term consequences. On June 20, 2019, the PUC issued an order reopening the docket for further proceedings. On September 29, 2019, the PUC issued an order setting the procedural schedule for the matter and on December 20, 2019, issued an order modifying the procedural schedule. Pre-hearing matters will be conducted through March 6, 2020. Thereafter, the PUC will set the date for an evidentiary hearing and post-hearing briefing. Hu Honua expected to complete construction of the plant in the fourth quarter of 2019, but has been delayed. Utility projects . Many public utility projects require PUC approval and various permits from other governmental agencies. Difficulties in obtaining, or the inability to obtain, the necessary approvals or permits can result in significantly increased project costs or even cancellation of projects. In the event a project does not proceed, or if it becomes probable the PUC will disallow cost recovery for all or part of a project, or if PUC-imposed caps on project costs are expected to be exceeded, project costs may need to be written off in amounts that could result in significant reductions in Hawaiian Electric’s consolidated net income. Enterprise Resource Planning/Enterprise Asset Management (ERP/EAM) implementation project. On August 11, 2016, the PUC approved the Utilities’ request to commence the ERP/EAM implementation project, subject to certain conditions, including a $77.6 million cap on cost recovery as well as a requirement that the Utilities achieve future cost savings consistent with a minimum of $246 million in ERP/EAM project-related benefits to be delivered to customers over the system’s 12 -year service life. The decision and order (D&O) approved the deferral of certain project costs and allowed the accrual of allowance for funds used during construction (AFUDC), but limited the AFUDC rate to 1.75% . The ERP/EAM Implementation Project went live in October 2018. In the Hawaiian Electric 2017 rate case, a settlement agreement approved by the PUC included authorization for the deferred project costs to accrue a return at 1.75% after the project went into service and until the deferred project costs are included in rate base, and for amortization of the deferred costs to not begin until the amortization expense is incorporated in rates and the unamortized deferred project costs are included in rate base. As of December 31, 2019, the total deferred project costs and accrued carrying costs after the project went into service amounted to $59.3 million. In February 2019, the PUC approved a methodology for passing the future cost saving benefits of the new ERP/EAM system to customers developed by the Utilities in collaboration with the Consumer Advocate. The Utilities filed a benefits clarification document on June 10, 2019, reflecting $150 million in future net O&M expense reductions and cost avoidance, and $96 million in capital cost reductions and tax savings over the 12 -year service life. To the extent the reduction in O&M expense relates to amounts reflected in electric rates, the Utilities would reduce future rates for such amounts. As of December 31, 2019 , the Utilities recorded a total of $2.4 million as a regulatory liability for amounts to be returned to customers for reduction in O&M expense included in rates. On September 13, 2019, the Utilities filed their Semi-Annual Enterprise System Benefits Report for the period January 1 through June 30, 2019. In October 2019, the PUC approved the Utilities and the Consumer Advocate’s Stipulated Performance Metrics and Tracking Mechanism. West Loch PV Project. In November 2019, Hawaiian Electric placed into service a 20 -MW (ac) utility-owned and operated renewable and dispatchable solar facility on property owned by the Department of the Navy. PUC orders resulted in a project cost cap of $67 million and a performance guarantee to provide energy at 9.56 cents/kWh or less to the system. Capital cost recovery under MPIR was approved by the PUC in December 2019 (See “Decoupling” section below for MPIR guidelines and cost recovery discussion.) Project costs incurred as of December 31, 2019 amounted to $51.4 million and generated $13.4 million and $14.0 million in federal and state nonrefundable tax credits, respectively. The tax credits are being deferred and amortized, starting in 2020, over PUC-approved amortization periods. Environmental regulation . The Utilities are subject to environmental laws and regulations that regulate the operation of existing facilities, the construction and operation of new facilities and the proper cleanup and disposal of hazardous waste and toxic substances. Hawaiian Electric, Hawaii Electric Light and Maui Electric, like other utilities, periodically encounter petroleum or other chemical releases associated with current or previous operations. The Utilities report and take action on these releases when and as required by applicable law and regulations. The Utilities believe the costs of responding to such releases identified to date will not have a material effect, individually or in the aggregate, on Hawaiian Electric’s consolidated results of operations, financial condition or liquidity. Former Molokai Electric Company generation site . In 1989, Maui Electric acquired by merger Molokai Electric Company. Molokai Electric Company had sold its former generation site (Site) in 1983 but continued to operate at the Site under a lease until 1985. The EPA has since identified environmental impacts in the subsurface soil at the Site.In cooperation with the Hawaii Department of Health and EPA, Maui Electric further investigated the Site and the Adjacent Parcel to determine the extent of impacts of polychlorinated biphenyls (PCBs), residual fuel oils and other subsurface contaminants. Maui Electric has a reserve balance of $2.7 million as of December 31, 2019 , representing the probable and reasonably estimable undiscounted cost for remediation of the Site and the Adjacent Parcel; however, final costs of remediation will depend on cleanup approach implemented. Pearl Harbor sediment study . In July 2014, the U.S. Navy notified Hawaiian Electric of the Navy’s determination that Hawaiian Electric is a Potentially Responsible Party responsible for the costs of investigation and cleanup of PCBs contamination in sediment in the area offshore of the Waiau Power Plant as part of the Pearl Harbor Superfund Site. Hawaiian Electric was also required by the EPA to assess potential sources and extent of PCB contamination onshore at Waiau Power Plant. As of December 31, 2019 , the reserve account balance recorded by Hawaiian Electric to address the PCB contamination was $ 4.2 million . The reserve balance represents the probable and reasonably estimable undiscounted cost for the onshore investigation and the remediation of PCB contamination in the offshore sediment. The final remediation costs will depend on the potential onshore source control requirements and actual offshore cleanup costs. Asset retirement obligations . AROs represent legal obligations associated with the retirement of certain tangible long-lived assets, are measured as the present value of the projected costs for the future retirement of specific assets and are recognized in the period in which the liability is incurred if a reasonable estimate of fair value can be made. The Utilities’ recognition of AROs have no impact on their earnings. The cost of the AROs is recovered over the life of the asset through depreciation. AROs recognized by the Utilities relate to legal obligations associated with the retirement of plant and equipment, including removal of asbestos and other hazardous materials. The Utilities recorded AROs related to 1) the removal of retired generating units, certain types of transformers and underground storage tanks; 2) the abandonment of fuel pipelines, underground injection and supply wells; and 3) the removal of equipment and restoration of leased land used in connection with Utility-owned renewable and dispatchable generation facilities. Changes to the ARO liability included in “Other liabilities” on Hawaiian Electric’s balance sheet were as follows: (in thousands) 2019 2018 Balance, January 1 $ 8,426 $ 6,035 Accretion expense 312 282 Liabilities incurred 1,594 1,058 Liabilities settled (8 ) (74 ) Revisions in estimated cash flows — 1,125 Balance, December 31 $ 10,324 $ 8,426 The Utilities have not recorded AROs for assets that are expected to operate indefinitely or where the Utilities cannot estimate a settlement date (or range of potential settlement dates). As such, ARO liabilities are not recorded for certain asset retirement activities, including various Utilities-owned generating facilities and certain electric transmission, distribution and telecommunications assets resulting from easements over property not owned by the Utilities. Regulatory proceedings. Decoupling . Decoupling is a regulatory model that is intended to provide the Utilities with financial stability and facilitate meeting the State of Hawaii’s goals to transition to a clean energy economy and achieve an aggressive renewable portfolio standard. The decoupling mechanism has the following major components: (1) monthly revenue balancing account (RBA) revenues or refunds for the difference between PUC-approved target revenues and recorded adjusted revenues, which delinks revenues from kilowatthour sales, (2) RAM revenues for escalation in certain O&M expenses and rate base changes, (3) MPIR component, (4) performance incentive mechanisms (PIMs), and (5) an earnings sharing mechanism, which would provide for a reduction of revenues between rate cases in the event the utility exceeds the return on average common equity (ROACE) allowed in its most recent rate case. Under the decoupling mechanism, triennial general rate cases are required. Rate adjustment mechanism . The RAM is based on the lesser of: a) an inflationary adjustment for certain O&M expenses and return on investment for certain rate base changes, or b) cumulative annual compounded increase in Gross Domestic Product Price Index applied to annualized target revenues (the RAM Cap). Annualized target revenues reset upon the issuance of an interim or final D&O in a rate case. Each of the Utilities’ RAM revenues was below its respective RAM Cap in 2019. The 2019 RAM also incorporated additional amortization of the regulatory liability associated with certain excess deferred taxes resulting from the Tax Act decrease in tax rates. The reduction in the RAM revenues will be counterbalanced by the lower income tax expense and, therefore, will have no net income impact. Major project interim recovery . On April 27, 2017, the PUC issued an order that provided guidelines for interim recovery of revenues to support major projects placed in service between general rate cases. Projects eligible for recovery through the MPIR adjustment mechanism are major projects (i.e., projects with capital expenditures net of customer contributions in excess of $2.5 million ), including, but not restricted to, renewable energy, energy efficiency, utility scale generation, grid modernization and smaller qualifying projects grouped into programs for review. The MPIR adjustment mechanism provides the opportunity to recover revenues for approved costs of eligible projects placed in service between general rate cases wherein cost recovery is limited by a revenue cap and is not provided by other effective recovery mechanisms. The request for PUC approval must include a business case, and all costs that are allowed to be recovered through the MPIR adjustment mechanism must be offset by any related benefits. The guidelines provide for accrual of revenues approved for recovery upon in-service date to be collected from customers through the annual RBA tariff. Capital projects that are not recovered through the MPIR would be included in the RAM and be subject to the RAM Cap, until the next rate case when the Utilities would request recovery in base rates. The PUC approved recovery of capital costs under the MPIR for Schofield Generating Station, which increased revenues in 2018 by $3.6 million and are being collected in customer bills since June 2019. In February 2019, Hawaiian Electric submitted an MPIR filing of $19.8 million for 2019 (which accrued effective January 1, 2019) that included the 2019 return on project amount (up to the capped amount) in rate base, depreciation and incremental O&M expenses, for collection from June 2020 through May 2021. The PUC approved the Utilities’ requests for MPIR of the cost of the Grid Modernization Strategy Phase 1 project and West Loch PV project in March and December 2019, respectively. On February 7, 2020, the Utilities submitted an MPIR filing totaling $24.2 million for the Schofield Generation Station ( $19.2 million ), West Loch PV project ( $4.5 million ) and Grid Modernization Strategy Phase 1 project ( $0.5 million for all three utilities) for the accrual of revenues effective January 1, 2020, that included the 2020 return on project amount (up to the capped amount) in rate base, depreciation and incremental O&M expenses, for collection from June 2021 through May 2022. Performance incentive mechanisms . The PUC has established the following PIMs. • Service Quality performance incentives are measured on a calendar-year basis. The PIM tariff requires the performance targets, deadbands and the amount of maximum financial incentives used to determine the PIM financial incentive levels for each of the PIMs to be re-determined upon issuance of an interim or final order in a general rate case for each utility. • Service Reliability Performance measured by System Average Interruption Duration and Frequency Indexes (penalties only). Target performance is based on each utility’s historical 10 -year average performance with a deadband of one standard deviation. The maximum penalty for each performance index is 20 basis points applied to the common equity share of each respective utility’s approved rate base (or maximum penalties of approximately $6.7 million - for both indices in total for the three utilities). • Call Center Performance measured by the percentage of calls answered within 30 seconds. Target performance is based on the annual average performance for each utility for the most recent 8 quarters with a deadband of 3% above and below the target. The maximum penalty or reward is 8 basis points applied to the common equity share of each respective utility’s approved rate base (or maximum penalties or rewards of approximately $1.3 million - in total for the three utilities). • In December 2018, the Utilities accrued $2.1 million in estimated penalties for service reliability, net of call center performance rewards, for 2018. As a result of a PUC order denying the exclusion of the impact of a specific project on the service reliability performance, in May 2019, Hawaiian Electric accrued an additional $1.3 million in service reliability penalties related to 2018. The net service quality performance penalties related to 2018 were reflected in the 2019 annual decoupling filing and will reduce customer rates in the period June 1, 2019 through May 31, 2020. • In December 2019, the Utilities accrued $ 0.3 million in estimated rewards for call center performance, net of service reliability penalties, for 2019. The net service quality performance rewards related to 2019 will be reflected in the 2020 annual decoupling filing and will increase customer rates in the period June 1, 2020 through May 31, 2021. • Procurement of low-cost variable renewable resources through the request for proposal process in 2018 measured by comparison of the procurement price to target prices. The incentive is a percentage of the savings determined by comparing procured price to a target of 11.5 cents per kilowatt-hour for renewable projects with storage capability and 9.5 cents per kilowatt-hour for energy-only renewable projects. For PPAs filed by December 31, 2018 and subsequently approved by the PUC, the incentive is 20% of the savings, with a cap of $3.5 million for the three utilities in total. For PPAs filed in January, February, and March 2019 and subsequently approved by the PUC, scaled incentives are 15% , 10% and 5% , respectively, of the savings for PPAs, with a cap of $3 million for the three utilities in total. There are no penalties. On March 25, 2019, the PUC approved six contracts, which were filed by December 31, 2018 and qualified for incentives. A seventh contract, which was filed in February 2019 and approved in August 2019, also qualified for incentives. Half of the incentive is earned upon PUC approval of the contract and the other half is eligible to be earned in the year following the in-service date of the projects. The Utilities accrued $1.7 million in incentives in March 2019, which were reflected in the 2019 annual decoupling filing and will be recovered in rates in the period June 1, 2019 through May 31, 2020. On October 9, 2019, the PUC issued an order establishing PIMs for the Utilities with regards to the Variable Renewable Dispatchable Generation and Energy Storage requests for proposals (RFPs) as well as the Delivery of Grid Services via Customer-sited Distributed Energy Resources RFPs, that were issued on August 22, 2019 for Oahu, Maui and Hawaii island. The order establishes pricing thresholds, timelines to complete contracting, and other performance criteria for the performance incentive eligibility. The PIMs provide incentives only without penalties. The earliest the Utilities would be eligible for a PIM pursuant to this order is upon PUC approval of executed contracts resulting from the Phase 2 RFPs. The order requires contracts under the Grid Service RFP be filed for approval by May 2020, and by September 2020 under the Renewable RFPs. There is no set time period for approval. The Utilities filed a motion for reconsideration and/or clarification regarding the order on October 21, 2019, relating to certain design aspects and eligibility criteria for the PIMs. Annual decoupling filings . The net annual incremental amounts approved to be collected (refunded) from June 1, 2019 through May 31, 2020 are as follows: (in millions) Hawaiian Electric Hawaii Electric Light Maui Electric Total 2019 Annual incremental RAM adjus

Bank segment (HEI only)

Bank segment (HEI only)	12 Months Ended
	Dec. 31, 2019
Bank Segment Disclosure [Abstract]
Bank segment (HEI only)	Note 4 · Bank segment (HEI only) Selected financial information American Savings Bank, F.S.B. Statements of Income and Comprehensive Income Data Years ended December 31 2019 2018 2017 (in thousands) Interest and dividend income Interest and fees on loans $ 233,632 $ 220,463 $ 207,255 Interest and dividends on investment securities 32,922 37,762 28,823 Total interest and dividend income 266,554 258,225 236,078 Interest expense Interest on deposit liabilities 16,830 13,991 9,660 Interest on other borrowings 1,610 1,548 2,496 Total interest expense 18,440 15,539 12,156 Net interest income 248,114 242,686 223,922 Provision for loan losses 23,480 14,745 10,901 Net interest income after provision for loan losses 224,634 227,941 213,021 Noninterest income Fees from other financial services 19,275 18,937 22,796 Fee income on deposit liabilities 20,877 21,311 22,204 Fee income on other financial products 6,507 7,052 7,205 Bank-owned life insurance 7,687 5,057 5,539 Mortgage banking income 4,943 1,493 2,201 Gain on sale of real estate 10,762 — — Gains on sale of investment securities, net 653 — — Other income, net 2,074 2,200 1,617 Total noninterest income 72,778 56,050 61,562 Noninterest expense Compensation and employee benefits 103,009 98,387 94,931 Occupancy 21,272 17,073 16,699 Data processing 15,306 14,268 13,280 Services 10,239 10,847 10,994 Equipment 8,760 7,186 7,232 Office supplies, printing and postage 5,512 6,134 6,182 Marketing 4,490 3,567 3,501 FDIC insurance 1,204 2,713 2,904 Other expense 15,586 17,238 20,144 Total noninterest expense 185,378 177,413 175,867 Income before income taxes 112,034 106,578 98,716 Income taxes 23,061 24,069 31,719 Net income 88,973 82,509 66,997 Other comprehensive income (loss), net of taxes 29,406 (7,119 ) (3,139 ) Comprehensive income $ 118,379 $ 75,390 $ 63,858 Reconciliation to amounts per HEI Consolidated Statements of Income*: Years ended December 31 2019 2018 2017 (in thousands) Interest and dividend income $ 266,554 $ 258,225 $ 236,078 Noninterest income 72,778 56,050 61,562 Less: Gain on sale of real estate (10,762 ) — — *Revenues-Bank 328,570 314,275 297,640 Total interest expense 18,440 15,539 12,156 Provision for loan losses 23,480 14,745 10,901 Noninterest expense 185,378 177,413 175,867 Less: Retirement defined benefits credit (expense)—other than service costs 472 (1,657 ) (820 ) Add: Gain on sale of real estate (10,762 ) — — *Expenses-Bank 217,008 206,040 198,104 *Operating income-Bank 111,562 108,235 99,536 Add back: Retirement defined benefits expense (credit)—other than service costs (472 ) 1,657 820 Income before income taxes $ 112,034 $ 106,578 $ 98,716 Balance Sheets Data December 31 2019 2018 (in thousands) Assets Cash and due from banks $ 129,770 $ 122,059 Interest-bearing deposits 48,628 4,225 Investment securities Available-for-sale, at fair value 1,232,826 1,388,533 Held-to-maturity, at amortized cost (fair value of $143,467 and $142,057 at December 31, 2019 and 2018, respectively) 139,451 141,875 Stock in Federal Home Loan Bank, at cost 8,434 9,958 Loans held for investment 5,121,176 4,843,021 Allowance for loan losses (53,355 ) (52,119 ) Net loans 5,067,821 4,790,902 Loans held for sale, at lower of cost or fair value 12,286 1,805 Other 511,611 486,347 Goodwill 82,190 82,190 Total assets $ 7,233,017 $ 7,027,894 Liabilities and shareholder’s equity Deposit liabilities–noninterest-bearing $ 1,909,682 $ 1,800,727 Deposit liabilities–interest-bearing 4,362,220 4,358,125 Other borrowings 115,110 110,040 Other 146,954 124,613 Total liabilities 6,533,966 6,393,505 Commitments and contingencies Common stock 1 1 Additional paid in capital 349,453 347,170 Retained earnings 358,259 325,286 Accumulated other comprehensive loss, net of tax benefits Net unrealized gains (losses) on securities $ 2,481 $ (24,423 ) Retirement benefit plans (11,143 ) (8,662 ) (13,645 ) (38,068 ) Total shareholder’s equity 699,051 634,389 Total liabilities and shareholder’s equity $ 7,233,017 $ 7,027,894 December 31 2019 2018 (in thousands) Other assets Bank-owned life insurance $ 157,465 $ 151,172 Premises and equipment, net 204,449 214,415 Accrued interest receivable 19,365 20,140 Mortgage servicing rights 9,101 8,062 Low-income housing investments 66,302 67,626 Real estate acquired in settlement of loans, net — 406 Other 54,929 24,526 $ 511,611 $ 486,347 Other liabilities Accrued expenses $ 45,822 $ 54,084 Federal and state income taxes payable 14,996 2,012 Cashier’s checks 23,647 26,906 Advance payments by borrowers 10,486 10,183 Other 52,003 31,428 $ 146,954 $ 124,613 Bank-owned life insurance is life insurance purchased by ASB on the lives of certain key employees, with ASB as the beneficiary. The insurance is used to fund employee benefits through tax-free income from increases in the cash value of the policies and insurance proceeds paid to ASB upon an insured’s death. The decrease in premises and equipment, net was due to the sale of two building facilities. Investment securities. The major components of investment securities were as follows: Gross unrealized losses Gross unrealized gains Gross unrealized Estimated fair value Less than 12 months 12 months or longer (dollars in thousands) Amortized cost Number of issues Fair value Amount Number of issues Fair value Amount December 31, 2019 Available-for-sale U.S. Treasury and federal agency obligations $ 117,255 $ 652 $ (120 ) $ 117,787 2 $ 4,110 $ (11 ) 3 $ 27,637 $ (109 ) Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies 1,024,892 6,000 (4,507 ) 1,026,385 19 152,071 (819 ) 75 318,020 (3,688 ) Corporate bonds 58,694 1,363 — 60,057 — — — — — — Mortgage revenue bonds 28,597 — — 28,597 — — — — — — $ 1,229,438 $ 8,015 $ (4,627 ) $ 1,232,826 21 $ 156,181 $ (830 ) 78 $ 345,657 $ (3,797 ) Held-to-maturity Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies $ 139,451 $ 4,087 $ (71 ) $ 143,467 1 $ 12,986 $ (71 ) — $ — $ — $ 139,451 $ 4,087 $ (71 ) $ 143,467 1 $ 12,986 $ (71 ) — $ — $ — Gross unrealized losses Gross unrealized gains Gross unrealized Estimated fair value Less than 12 months 12 months or longer (dollars in thousands) Amortized cost Number of issues Fair value Amount Number of issues Fair value Amount December 31, 2018 Available-for-sale U.S. Treasury and federal agency obligations $ 156,694 $ 62 $ (2,407 ) $ 154,349 5 $ 25,882 $ (208 ) 19 $ 118,405 $ (2,199 ) Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies 1,192,169 789 (31,542 ) 1,161,416 22 129,011 (1,330 ) 145 947,890 (30,212 ) Corporate bonds 49,398 103 (369 ) 49,132 6 23,175 (369 ) — — — Mortgage revenue bond 23,636 — — 23,636 — — — — — — $ 1,421,897 $ 954 $ (34,318 ) $ 1,388,533 33 $ 178,068 $ (1,907 ) 164 $ 1,066,295 $ (32,411 ) Held-to-maturity Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies $ 141,875 $ 1,446 $ (1,264 ) $ 142,057 3 $ 29,814 $ (400 ) 2 $ 31,505 $ (864 ) $ 141,875 $ 1,446 $ (1,264 ) $ 142,057 3 $ 29,814 $ (400 ) 2 $ 31,505 $ (864 ) ASB does not believe that the investment securities that were in an unrealized loss position as of December 31, 2019 , represent an OTTI. Total gross unrealized losses were primarily attributable to change in market conditions. On a quarterly basis the investment securities are evaluated for changes in financial condition of the issuer. Based upon ASB’s evaluation, all securities held within the investment portfolio continue to be investment grade by one or more agencies. The contractual cash flows of the U.S. Treasury, federal agency obligations and agency mortgage-backed securities are backed by the full faith and credit guaranty of the United States government or an agency of the government. ASB does not intend to sell the securities before the recovery of its amortized cost basis and there have been no adverse changes in the timing of the contractual cash flows for the securities. ASB did not recognize OTTI for 2019 , 2018 and 2017 . U.S. Treasury, federal agency obligations, corporate bonds, and mortgage revenue bonds have contractual terms to maturity. Mortgage-backed securities have contractual terms to maturity, but require periodic payments to reduce principal. In addition, expected maturities will differ from contractual maturities because borrowers have the right to prepay the underlying mortgages. The contractual maturities of investment securities were as follows: Amortized Fair December 31, 2019 Cost value (in thousands) Available-for-sale Due in one year or less $ 60,200 $ 60,249 Due after one year through five years 75,694 77,225 Due after five years through ten years 53,225 53,540 Due after ten years 15,427 15,427 204,546 206,441 Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies 1,024,892 1,026,385 Total available-for-sale securities $ 1,229,438 $ 1,232,826 Held-to-maturity Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies $ 139,451 $ 143,467 Total held-to-maturity securities $ 139,451 $ 143,467 The proceeds, gross gains and losses from sales of available-for-sale securities were as follows: Years ended December 31 2019 2018 2017 (in millions) Proceeds $ 19.8 $ — $ — Gross gains 0.7 — — Gross losses — — — Interest income from taxable and non-taxable investment securities were as follows: Years ended December 31 2019 2018 2017 (in thousands) Taxable $ 31,847 $ 37,153 $ 28,398 Non-taxable 1,074 609 425 $ 32,921 $ 37,762 $ 28,823 ASB pledged securities with a market value of approximately $546 million as of December 31, 2019 and 2018 , as collateral for public funds and other deposits, automated clearinghouse transactions with Bank of Hawaii, borrowing at the discount window of the Federal Reserve Bank of San Francisco, and deposits in ASB’s bankruptcy account with the Federal Reserve Bank of San Francisco. As of December 31, 2019 and 2018 , securities with a carrying value of $130 million and $92 million , respectively, were pledged as collateral for securities sold under agreements to repurchase. Stock in FHLB . As of December 31, 2019 and 2018 , ASB’s stock in FHLB was carried at cost ( $8.4 million and $10.0 million , respectively) because it can only be redeemed at par and it is a required investment based on measurements of ASB’s capital, assets and borrowing levels. Quarterly and as conditions warrant, ASB reviews its investment in the stock of the FHLB for impairment. ASB evaluated its investment in FHLB stock for OTTI as of December 31, 2019 , consistent with its accounting policy. ASB did not recognize an OTTI loss for 2019 , 2018 and 2017 based on its evaluation of the underlying investment. Future deterioration in the FHLB’s financial position and/or negative developments in any of the factors considered in ASB’s impairment evaluation may result in future impairment losses. Loans. The components of loans were summarized as follows: December 31 2019 2018 (in thousands) Real estate: Residential 1-4 family $ 2,178,135 $ 2,143,397 Commercial real estate 824,830 748,398 Home equity line of credit 1,092,125 978,237 Residential land 14,704 13,138 Commercial construction 70,605 92,264 Residential construction 11,670 14,307 Total real estate 4,192,069 3,989,741 Commercial 670,674 587,891 Consumer 257,921 266,002 Total loans 5,120,664 4,843,634 Less: Deferred fees and discounts 512 (613 ) Allowance for loan losses (53,355 ) (52,119 ) Total loans, net $ 5,067,821 $ 4,790,902 ASB’s policy is to require private mortgage insurance on all real estate loans when the loan-to-value ratio of the property exceeds 80% of the lower of the appraised value or purchase price at origination. For non-owner occupied residential property purchases, the loan-to-value ratio may not exceed 75% of the lower of the appraised value or purchase price at origination. ASB services real estate loans for investors (principal balance of $1.3 billion , $ 1.2 billion and $ 1.2 billion as of December 31, 2019 , 2018 and 2017 , respectively), which are not included in the accompanying balance sheets data. ASB reports fees earned for servicing such loans as income when the related mortgage loan payments are collected and charges loan servicing cost to expense as incurred. As of December 31, 2019 and 2018 , ASB had pledged loans with an amortized cost of approximately $2.9 billion and $ 2.7 billion , respectively, as collateral to secure advances from the FHLB. As of December 31, 2019 and 2018 , the aggregate amount of loans to directors and executive officers of ASB and its affiliates and any related interests (as defined in Federal Reserve Board (FRB) Regulation O) of such individuals, was $24.1 million and $24.0 million , respectively. As of December 31, 2019 and 2018 , $18.0 million and $18.3 million of the loan balances, respectively, were to related interests of individuals who are directors of ASB. All such loans were made at ASB’s normal credit terms. Allowance for loan losses. As discussed in Note 1 , ASB must maintain an allowance for loan losses that is adequate to absorb estimated probable credit losses associated with its loan portfolio. The allowance for loan losses (balances and changes) and financing receivables were as follows: (in thousands) Residential 1-4 family Commercial Home equity Residential land Commercial construction Residential construction Commercial Consumer Total December 31, 2019 Allowance for loan losses: Beginning balance $ 1,976 $ 14,505 $ 6,371 $ 479 $ 2,790 $ 4 $ 9,225 $ 16,769 $ 52,119 Charge-offs (26 ) — (144 ) (4 ) — — (6,811 ) (21,677 ) (28,662 ) Recoveries 854 — 17 229 — — 2,351 2,967 6,418 Provision (424 ) 548 678 (255 ) (693 ) (1 ) 5,480 18,147 23,480 Ending balance $ 2,380 $ 15,053 $ 6,922 $ 449 $ 2,097 $ 3 $ 10,245 $ 16,206 $ 53,355 Ending balance: individually evaluated for impairment $ 898 $ 2 $ 322 $ — $ — $ — $ 1,015 $ 454 $ 2,691 Ending balance: collectively evaluated for impairment $ 1,482 $ 15,051 $ 6,600 $ 449 $ 2,097 $ 3 $ 9,230 $ 15,752 $ 50,664 Financing Receivables: Ending balance $ 2,178,135 $ 824,830 $ 1,092,125 $ 14,704 $ 70,605 $ 11,670 $ 670,674 $ 257,921 $ 5,120,664 Ending balance: individually evaluated for impairment $ 15,600 $ 1,048 $ 12,073 $ 3,091 $ — $ — $ 8,418 $ 507 $ 40,737 Ending balance: collectively evaluated for impairment $ 2,162,535 $ 823,782 $ 1,080,052 $ 11,613 $ 70,605 $ 11,670 $ 662,256 $ 257,414 $ 5,079,927 December 31, 2018 Allowance for loan losses: Beginning balance $ 2,902 $ 15,796 $ 7,522 $ 896 $ 4,671 $ 12 $ 10,851 $ 10,987 $ 53,637 Charge-offs (128 ) — (353 ) (18 ) — — (2,722 ) (17,296 ) (20,517 ) Recoveries 74 — 257 179 — — 2,136 1,608 4,254 Provision (872 ) (1,291 ) (1,055 ) (578 ) (1,881 ) (8 ) (1,040 ) 21,470 14,745 Ending balance $ 1,976 $ 14,505 $ 6,371 $ 479 $ 2,790 $ 4 $ 9,225 $ 16,769 $ 52,119 Ending balance: individually evaluated for impairment $ 876 $ 7 $ 701 $ 6 $ — $ — $ 628 $ 4 $ 2,222 Ending balance: collectively evaluated for impairment $ 1,100 $ 14,498 $ 5,670 $ 473 $ 2,790 $ 4 $ 8,597 $ 16,765 $ 49,897 Financing Receivables: Ending balance $ 2,143,397 $ 748,398 $ 978,237 $ 13,138 $ 92,264 $ 14,307 $ 587,891 $ 266,002 $ 4,843,634 Ending balance: individually evaluated for impairment $ 16,494 $ 915 $ 14,800 $ 2,059 $ — $ — $ 5,340 $ 89 $ 39,697 Ending balance: collectively evaluated for impairment $ 2,126,903 $ 747,483 $ 963,437 $ 11,079 $ 92,264 $ 14,307 $ 582,551 $ 265,913 $ 4,803,937 December 31, 2017 Allowance for loan losses: Beginning balance $ 2,873 $ 16,004 $ 5,039 $ 1,738 $ 6,449 $ 12 $ 16,618 $ 6,800 $ 55,533 Charge-offs (826 ) — (14 ) (210 ) — — (4,006 ) (11,757 ) (16,813 ) Recoveries 157 — 308 482 — — 1,852 1,217 4,016 Provision 698 (208 ) 2,189 (1,114 ) (1,778 ) — (3,613 ) 14,727 10,901 Ending balance $ 2,902 $ 15,796 $ 7,522 $ 896 $ 4,671 $ 12 $ 10,851 $ 10,987 $ 53,637 Ending balance: individually evaluated for impairment $ 1,248 $ 65 $ 647 $ 47 $ — $ — $ 694 $ 29 $ 2,730 Ending balance: collectively evaluated for impairment $ 1,654 $ 15,731 $ 6,875 $ 849 $ 4,671 $ 12 $ 10,157 $ 10,958 $ 50,907 Financing Receivables: Ending balance $ 2,118,047 $ 733,106 $ 913,052 $ 15,797 $ 108,273 $ 14,910 $ 544,828 $ 223,564 $ 4,671,577 Ending balance: individually evaluated for impairment $ 18,284 $ 1,016 $ 8,188 $ 1,265 $ — $ — $ 4,574 $ 66 $ 33,393 Ending balance: collectively evaluated for impairment $ 2,099,763 $ 732,090 $ 904,864 $ 14,532 $ 108,273 $ 14,910 $ 540,254 $ 223,498 $ 4,638,184 Credit quality . ASB performs an internal loan review and grading on an ongoing basis. The review provides management with periodic information as to the quality of the loan portfolio and effectiveness of its lending policies and procedures. The objectives of the loan review and grading procedures are to identify, in a timely manner, existing or emerging credit trends so that appropriate steps can be initiated to manage risk and avoid or minimize future losses. Loans subject to grading include commercial, commercial real estate and commercial construction loans. Each commercial and commercial real estate loan is assigned an Asset Quality Rating (AQR) reflecting the likelihood of repayment or orderly liquidation of that loan transaction pursuant to regulatory credit classifications: Pass, Special Mention, Substandard, Doubtful, and Loss. The AQR is a function of the probability of default model rating, the loss given default, and possible non-model factors which impact the ultimate collectability of the loan such as character of the business owner/guarantor, interim period performance, litigation, tax liens and major changes in business and economic conditions. Pass exposures generally are well protected by the current net worth and paying capacity of the obligor or by the value of the asset or underlying collateral. Special Mention loans have potential weaknesses that, if left uncorrected, could jeopardize the liquidation of the debt. Substandard loans have well-defined weaknesses that jeopardize the liquidation of the debt and are characterized by the distinct possibility that ASB may sustain some loss. An asset classified Doubtful has the weaknesses of those classified Substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. An asset classified Loss is considered uncollectible and has such little value that its continuance as a bankable asset is not warranted. The credit risk profile by internally assigned grade for loans was as follows: December 31 2019 2018 (in thousands) Commercial real estate Commercial construction Commercial Total Commercial real estate Commercial construction Commercial Total Grade: Pass $ 756,747 $ 68,316 $ 621,657 $ 1,446,720 $ 658,288 $ 89,974 $ 547,640 $ 1,295,902 Special mention 4,451 — 29,921 34,372 32,871 — 11,598 44,469 Substandard 63,632 2,289 19,096 85,017 57,239 2,290 28,653 88,182 Doubtful — — — — — — — — Loss — — — — — — — — Total $ 824,830 $ 70,605 $ 670,674 $ 1,566,109 $ 748,398 $ 92,264 $ 587,891 $ 1,428,553 The credit risk profile based on payment activity for loans was as follows: (in thousands) 30-59 days past due 60-89 days past due Greater than 90 days Total past due Current Total financing receivables Recorded investment> 90 days and accruing December 31, 2019 Real estate: Residential 1-4 family $ 2,588 $ 290 $ 1,808 $ 4,686 $ 2,173,449 $ 2,178,135 $ — Commercial real estate — — — — 824,830 824,830 — Home equity line of credit 813 — 2,117 2,930 1,089,195 1,092,125 — Residential land — — 25 25 14,679 14,704 — Commercial construction — — — — 70,605 70,605 — Residential construction — — — — 11,670 11,670 — Commercial 1,077 311 172 1,560 669,114 670,674 — Consumer 4,386 3,257 2,907 10,550 247,371 257,921 — Total loans $ 8,864 $ 3,858 $ 7,029 $ 19,751 $ 5,100,913 $ 5,120,664 $ — December 31, 2018 Real estate: Residential 1-4 family $ 3,757 $ 2,773 $ 2,339 $ 8,869 $ 2,134,528 $ 2,143,397 $ — Commercial real estate — — — — 748,398 748,398 — Home equity line of credit 1,139 681 2,720 4,540 973,697 978,237 — Residential land 9 — 319 328 12,810 13,138 — Commercial construction — — — — 92,264 92,264 — Residential construction — — — — 14,307 14,307 — Commercial 315 281 548 1,144 586,747 587,891 — Consumer 5,220 3,166 2,702 11,088 254,914 266,002 — Total loans $ 10,440 $ 6,901 $ 8,628 $ 25,969 $ 4,817,665 $ 4,843,634 $ — The credit risk profile based on nonaccrual loans, accruing loans 90 days or more past due, and TDR loans was as follows: Nonaccrual loans Accruing loans 90 days or more past due Troubled debt restructured loans not included in nonaccrual loans December 31 2019 2018 2019 2018 2019 2018 (in thousands) Real estate: Residential 1-4 family $ 11,395 $ 12,037 $ — $ — $ 9,869 $ 10,194 Commercial real estate 195 — — — 853 915 Home equity line of credit 6,638 6,348 — — 10,376 11,597 Residential land 448 436 — — 2,644 1,622 Commercial construction — — — — — — Residential construction — — — — — — Commercial 5,947 4,278 — — 2,614 1,527 Consumer 5,113 4,196 — — 57 62 Total $ 29,736 $ 27,295 $ — $ — $ 26,413 $ 25,917 The total carrying amount and the total unpaid principal balance of impaired loans were as follows: December 31 2019 2018 (in thousands) Recorded investment Unpaid principal balance Related allowance Recorded investment Unpaid principal balance Related allowance With no related allowance recorded Real estate: Residential 1-4 family $ 6,817 $ 7,207 $ — $ 7,822 $ 8,333 $ — Commercial real estate 195 200 — — — — Home equity line of credit 1,984 2,135 — 2,743 3,004 — Residential land 3,091 3,294 — 2,030 2,228 — Commercial construction — — — — — — Residential construction — — — — — — Commercial 1,948 2,285 — 3,722 4,775 — Consumer 2 2 — 32 32 — 14,037 15,123 — 16,349 18,372 — With an allowance recorded Real estate: Residential 1-4 family 8,783 8,835 898 8,672 8,875 876 Commercial real estate 853 853 2 915 915 7 Home equity line of credit 10,089 10,099 322 12,057 12,086 701 Residential land — — — 29 29 6 Commercial construction — — — — — — Residential construction — — — — — — Commercial 6,470 6,470 1,015 1,618 1,618 628 Consumer 505 505 454 57 57 4 26,700 26,762 2,691 23,348 23,580 2,222 Total Real estate: Residential 1-4 family 15,600 16,042 898 16,494 17,208 876 Commercial real estate 1,048 1,053 2 915 915 7 Home equity line of credit 12,073 12,234 322 14,800 15,090 701 Residential land 3,091 3,294 — 2,059 2,257 6 Commercial construction — — — — — — Residential construction — — — — — — Commercial 8,418 8,755 1,015 5,340 6,393 628 Consumer 507 507 454 89 89 4 $ 40,737 $ 41,885 $ 2,691 $ 39,697 $ 41,952 $ 2,222 ASB’s average recorded investment of, and interest income recognized from, impaired loans were as follows: December 31 2019 2018 2017 (in thousands) Average Interest Average Interest Average Interest With no related allowance recorded Real estate: Residential 1-4 family $ 8,169 $ 907 $ 8,595 $ 445 $ 9,440 $ 316 Commercial real estate 16 — — — 91 11 Home equity line of credit 2,020 84 2,206 75 1,976 101 Residential land 2,662 129 1,532 40 1,094 117 Commercial construction — — — — — — Residential construction — — — — — — Commercial 4,534 276 3,275 28 2,776 54 Consumer 21 4 22 — 1 — 17,422 1,400 15,630 588 15,378 599 With an allowance recorded Real estate: Residential 1-4 family 8,390 359 8,878 363 9,818 493 Commercial real estate 886 37 982 42 1,241 54 Home equity line of credit 11,319 567 10,617 440 5,045 251 Residential land 27 — 37 3 1,308 97 Commercial construction — — — — — — Residential construction — — — — — — Commercial 6,990 132 1,789 122 3,691 723 Consumer 360 24 57 4 57 3 27,972 1,119 22,360 974 21,160 1,621 Total Real estate: Residential 1-4 family 16,559 1,266 17,473 808 19,258 809 Commercial real estate 902 37 982 42 1,332 65 Home equity line of credit 13,339 651 12,823 515 7,021 352 Residential land 2,689 129 1,569 43 2,402 214 Commercial construction — — — — — — Residential construction — — — — — — Commercial 11,524 408 5,064 150 6,467 777 Consumer 381 28 79 4 58 3 $ 45,394 $ 2,519 $ 37,990 $ 1,562 $ 36,538 $ 2,220 * Since loan was classified as impaired. Troubled debt restructurings. A loan modification is deemed to be a TDR when the borrower is determined to be experiencing financial difficulties and ASB grants a concession it would not otherwise consider. When a borrower experiencing financial difficulty fails to make a required payment on a loan or is in imminent default, ASB takes a number of steps to improve the collectability of the loan and maximize the likelihood of full repayment. At times, ASB may modify or restructure a loan to help a distressed borrower improve its financial position to eventually be able to fully repay the loan, provided the borrower has demonstrated both the willingness and the ability to fulfill the modified terms. TDR loans are considered an alternative to foreclosure or liquidation with the goal of minimizing losses to ASB and maximizing recovery. ASB may consider various types of concessions in granting a TDR including maturity date extensions, extended amortization of principal, temporary deferral of principal payments, and temporary interest rate reductions. ASB rarely grants principal forgiveness in its TDR modifications. Residential loan modifications generally involve interest rate reduction, extending the amortization period, or capitalizing certain delinquent amounts owed not to exceed the original loan balance. Land loans at origination are typically structured as a three -year term, interest-only monthly payment with a balloon payment due at maturity. Land loan TDR modifications typically involve extending the maturity date up to five five years and converting the payments from interest-only to principal and interest monthly, at the same or higher interest rate. Commercial loan modifications generally involve extensions of maturity dates, extending the amortization period, and temporary deferral or reduction of principal payments. ASB generally does not reduce the interest rate on commercial loan TDR modifications. Occasionally, additional collateral and/or guaranties are obtained. All TDR loans are classified as impaired and are segregated and reviewed separately when assessing the adequacy of the allowance for loan losses based on the appropriate method of measuring impairment: (1) present value of expected future cash flows discounted at the loan’s effective original contractual rate, (2) fair value of collateral less cost to sell or (3) observable market price. The financial impact of the calculated impairment amount is an increase to the allowance associated with the modified loan. When available information confirms that specific loans or portions thereof are uncollectible (confirmed losses), these amounts are charged off against the allowance for loan losses. Loan modifications that occurred during 2019 , 2018 , and 2017 were as follows: Years ended December 31, 2019 December 31, 2018 (dollars in thousands) Number of contracts Outstanding (as of period end) 1 Related allowance (as of period end) Number of contracts Outstanding (as of period end) 1 Related allowance (as of period end) Real estate: Residential 1-4 family 11 $ 1,770 $ 190 3 $ 566 $ 26 Commercial real estate — — — — — — Home equity line of credit 3 442 73 53 6,659 578 Residential land 3 1,086 — 2 1,338 — Commercial construction — — — — — — Residential construction — — — — — — Commercial 8 5,523 417 12 2,165 211 Consumer — — — — — — 25 $ 8,821 $ 680 70 $ 10,728 $ 815 Year ended December 31, 2017 (dollars in thousands) Number of contracts Outstanding (as of period end) 1 Related allowance (as of period end) Real estate: Residential 1-4 family 3 $ 469 $ 65 Commercial real estate — — — Home equity line of credit 44 2,791 545 Residential land 1 92 — Commercial construction — — — Residential construction — — — Commercial 8 525 250 Consumer 1 58 29 57 $ 3,935 $ 889 1 The period end balances reflect all paydowns and charge-offs since the modification period. TDRs fully paid off, charged-off, or foreclosed upon by period end are not included. Loans modified in TDRs that experienced a payment default of 90 days or more in 2019 , 2018 , and 2017 and for which the payment default occurred within one year of the modification, were as follows: Years ended December 31 2019 2018 2017 (dollars in thousands) Number of contracts Recorded investment Number of contracts Recorded investment Number of Recorded Troubled debt restructurings that subsequently defaulted Real estate: Residential 1-4 family — $ — — $ — 1 $ 222 Commercial real estate — — — — — — Home equity line of credit — — 1 81 — — Residential land — — — — — — Commercial construction — — — — — — Residential construction — — — — — — Commercial — — 1 246 — — Consumer — — — — — — — $ — 2 $ 327 1 $ 222 If loans modified in a TDR subsequently default, ASB evaluates the loan for further impairment. Based on its evaluation, adjustments may be made in the allocation of the allowance or partial charge-offs may be taken to further write-down the carrying value of the loan. Commitments to lend additional funds to borrowers whose loan terms have been modified in a TDR were nil at December 31, 2019 and 2018 . The Company had $3.5 million and $4.2 million of consumer mortgage loans collateralized by residential real estate property that were in the process of foreclosure at December 31, 2019 and 2018 , respectively. Mortgage servicing rights (MSRs). In its mortgage banking business, ASB sells residential mortgage loans to government-sponsored entities and other parties, who may issue securities backed by pools of such loans. ASB retains no beneficial interests in these loans other than the servicing rights of certain loans sold. ASB received $277.1 million , $112.2 million and $128.0 million of proceeds from the sale of residential mortgages in 2019 , 2018 , and 2017 , respectively, and recognized gains on such sales of $4.9 million , $1.5 million , and $2.2 million in 2019 , 2018 , and 2017 , respectively. Repurchased mortgage loans were nil for 2019 , 2018 and 2017 . The repurchase reserve was $0.1 million as of December 31, 2019, 2018 and 2017. Mortgage servicing fees, a component of other income, net, were $3.0 million for the years ended December 31, 2019 , 2018 , and 2017 . Changes in the carrying value of MSRs were as follows: (in thousands) Gross 1 Accumulated amortization 1 Valuation allowance Net December 31, 2019 $ 21,543 $ (12,442 ) $ — $ 9,101 December 31, 2018 $ 18,556 $ (10,494 ) $ — $ 8,062 1 Reflects impact of loans paid in full. Changes related to MSRs were as follows: (in thousands) 2019 2018 2017 Mortgage servicing rights Balance, January 1 $ 8,062 $ 8,639 $ 9,373 Amount capitalized 2,987 1,045 1,239 Amortization (1,948 ) (1,622 ) (1,973 ) Sale of mortgage servicing rights — — — Other-than-temporary impairment — — — Carrying amount before valuation allowance, December 31 9,101 8,062 8,639 Valuation allowance for mortgage servicing rights Balance, January 1 — — — Provision (recovery) — — — Other-than-temporary impairment — — — Balance, December 31 — — — Net carrying value of mortgage servicing rights $ 9,101 $ 8,062 $ 8,639 The estimated aggregate amortization expenses of MSRs for 2020 , 2021 , 2022 , 2023 and 2024 are $1.5 million , $1.2 million , $1.1 million , $0.9 million and $0.8 million , respectively. ASB capitalizes MSRs acquired upon the sale of mortgage loans with servicing rights retained. On a monthly basis, ASB compares the net carrying value of the MSRs to its fair value to determine if there are any changes to the valuation allowance and/or other-than-temporary impairment for the MSRs. ASB uses a present value cash flow model to estimate the fair value of MSRs. Impairment is recognized through a valuation allowance for each stratum when the carrying amount exceeds fair value, with any associated provision recorded as a component of loan servicing fees included in “Revenues - bank” in the consolidated statements of income. A direct write-down is recorded when the recoverability of the valuation allowance is deemed to be unrecoverable. Key assumptions used in estimating the fair value of ASB’s MSRs used in the impairment analysis were as follows: December 31 2019 2018 (dollars in thousands) Unpaid principal balance $ 1,276,437 $ 1,188,514 Weighted average note rate 3.96 % 3.98 % Weighted average discount rate 9.3 % 10.0 % Weighted average prepayment speed 11.4 % 6.5 % The sensitivity analysis of fair value of MSRs to hypothetical adverse changes of 25 and 50 basis points in certain key

Short-term borrowings

Short-term borrowings	12 Months Ended
	Dec. 31, 2019
Short-term Debt [Abstract]
Short-term borrowings	Note 5 · Short-term borrowings Commercial paper and bank term loan. As of December 31, 2019 and 2018 , HEI had $97 million and $49 million of commercial paper outstanding, with a weighted-average interest rate of 2.3% and 2.9% , respectively. As of December 31, 2019 and 2018 , Hawaiian Electric had $39 million of and no commercial paper outstanding, respectively. Additionally, on December 23, 2019, Hawaiian Electric entered into a 364 -day, $100 million term loan credit agreement that matures on December 21, 2020. The term loan credit agreement includes substantially the same financial covenant and customary representations and warranties, affirmative and negative covenants, and events of default (the occurrence of which may result in the loan outstanding becoming immediately due and payable) consistent with those in Hawaiian Electric’s existing, amended revolving unsecured credit agreement. Hawaiian Electric drew the first $50 million on December 23, 2019 and has until March 23, 2020, to draw the remaining $50 million , if needed. The weighted-average interest rate of Hawaiian Electric’s outstanding commercial paper and bank term loan as of December 31, 2019 was 2.3% . As of December 31, 2019 and 2018 , HEI had three letters of credit outstanding in the aggregate amount of $6 million and $ 7 million , respectively, on behalf of Hamakua Energy. Credit agreements. HEI and Hawaiian Electric each entered into a separate agreement with a syndicate of eight financial institutions (the HEI Facility and Hawaiian Electric Facility, respectively, and together, the Credit Facilities), effective July 3, 2017, to amend and restate their respective previously existing revolving unsecured credit agreements. The $150 million HEI Facility and $200 million Hawaiian Electric Facility both terminate on June 30, 2022. As of December 31, 2019 and December 31, 2018 , no amounts were outstanding under the Credit Facilities. None of the facilities are collateralized. Under the Credit Facilities, draws would generally bear interest, based on each company’s respective current long-term credit ratings, at the “Adjusted LIBO Rate,” as defined in the agreement, plus 1.375% and annual fees on undrawn commitments, excluding swingline borrowings, of 20 basis points. The Credit Facilities contain provisions for pricing adjustments in the event of a long-term ratings change based on the respective Credit Facilities’ ratings-based pricing grid, which includes the ratings by Fitch, Moody’s and S&P. Certain modifications were made to incorporate some updated terms and conditions customary for facilities of this type. The Credit Facilities continue to contain customary conditions that must be met in order to draw on them, including compliance with covenants (such as covenants preventing HEI’s/Hawaiian Electric’s subsidiaries from entering into agreements that restrict the ability of the subsidiaries to pay dividends to, or to repay borrowings from, HEI/Hawaiian Electric; and a covenant in Hawaiian Electric’s facility restricting Hawaiian Electric’s ability, as well as the ability of any of its subsidiaries, to guarantee additional indebtedness of the subsidiaries if such additional debt would cause the subsidiary’s “Consolidated Subsidiary Funded Debt to Capitalization Ratio” to exceed 65% ). Under the HEI Facility, it is an event of default if HEI fails to maintain an unconsolidated “Capitalization Ratio” (funded debt) of 50% or less or if HEI no longer owns Hawaiian Electric or ASB. Under the Hawaiian Electric Facility, it is an event of default if Hawaiian Electric fails to maintain a “Consolidated Capitalization Ratio” (equity) of at least 35% , or if Hawaiian Electric is no longer owned by HEI. The Credit Facilities will be maintained to support each company’s respective short-term commercial paper program, but may be drawn on to meet each company’s respective working capital needs and general corporate purposes.

Long-term debt

Long-term debt	12 Months Ended
	Dec. 31, 2019
Long-term Debt, Unclassified [Abstract]
Long-term debt	Note 6 · Long-term debt December 31 2019 2018 (dollars in thousands) Long-term debt of Utilities, net of unamortized debt issuance costs 1 $ 1,497,667 $ 1,418,802 HEI 2.99% term loan, due 2022 150,000 150,000 HEI 5.67% senior notes, due 2021 50,000 50,000 HEI 3.99% senior notes, due 2023 50,000 50,000 HEI 4.58% senior notes, due 2025 50,000 50,000 HEI 4.72% senior notes, due 2028 100,000 100,000 Hamakua Energy 4.02% notes, due 2030, secured by real and personal property of Hamakua Energy, LLC 59,699 63,438 Mauo LIBOR + 1.375% loan, due 2022 9,349 — Less unamortized debt issuance costs (2,350 ) (2,599 ) $ 1,964,365 $ 1,879,641 1 See components of “Total long-term debt” and unamortized debt issuance costs in Hawaiian Electric and subsidiaries’ Consolidated Statements of Capitalization. As of December 31, 2019 , the aggregate principal payments required on the Company’s long-term debt for 2020 through 2024 are $102 million in 2020 , $54 million in 2021 , $213 million in 2022 , $154 million in 2023 and $5 million in 2024 . As of December 31, 2019 , the aggregate payments of principal required on the Utilities’ long-term debt for 2020 through 2024 are $96 million in 2020 , nil in 2021 , $52 million in 2022 , $100 million in 2023 and nil in 2024 . The HEI term loans and senior notes contain customary representation and warranties, affirmative and negative covenants and events of default (the occurrence of which may result in some or all of the notes then outstanding becoming immediately due and payable). The HEI term loans and senior notes also contain provisions requiring the maintenance by HEI of certain financial ratios generally consistent with those in HEI’s existing, amended revolving unsecured credit agreement. Upon a change of control or certain dispositions of assets (as defined in the Master Note Purchase Agreements dated March 24, 2011 and October 4, 2018), HEI is required to offer to prepay the senior notes. The Utilities’ senior notes contain customary representations and warranties, affirmative and negative covenants, and events of default (the occurrence of which may result in some or all of the notes of each and all of the utilities then outstanding becoming immediately due and payable) and provisions requiring the maintenance by Hawaiian Electric, and each of Hawaii Electric Light and Maui Electric, of certain financial ratios generally consistent with those in Hawaiian Electric’s existing, amended revolving unsecured credit agreement. Changes in long-term debt. Mauo . In June 2018, Mauo, LLC, an indirect subsidiary of Pacific Current, LLC, entered into an unsecured $50.5 million construction loan facility in connection with the construction of the solar-plus-storage PPA project. In October 2019, the loan was amended to extend the maturity date to March 31, 2022 and to revise certain other defined terms. The loan bears interest at LIBOR plus 1.375% . As of December 31, 2019 , $9 million was outstanding under the facility. The loan is guaranteed by HEI and contains restrictive covenants that are substantially the same as the financial covenants contained in HEI’s senior credit facility, as amended. Hawaiian Electric . On May 13, 2019, the Utilities issued, through a private placement pursuant to separate Note Purchase Agreements (the Note Purchase Agreements), the following unsecured notes bearing taxable interest (the Unsecured Notes): Series 2019A Aggregate principal amount $50 million Fixed coupon interest rate 4.21% Maturity date May 15, 2034 Principal amount by company: Hawaiian Electric $30 million Hawaii Electric Light $10 million Maui Electric $10 million The Unsecured Notes include substantially the same financial covenants and customary conditions as Hawaiian Electric’s credit agreement. Hawaiian Electric is also a party as guarantor under the Note Purchase Agreements entered into by Hawaii Electric Light and Maui Electric. The Unsecured Notes may be prepaid in whole or in part at any time at the prepayment price of the principal amount plus a “Make-Whole Amount,” as defined in the Note Purchase Agreements. On May 15, 2019, proceeds from the sale were applied to redeem the Utilities’ 2004 junior subordinated deferrable interest debentures at par value: 2004 Junior subordinated deferrable interest debentures redeemed Aggregate principal amount $51.5 million Fixed coupon interest rate 6.50% Maturity date May 15, 2034 Principal amount by company: Hawaiian Electric $31.5 million Hawaii Electric Light $10 million Maui Electric $10 million On July 18, 2019, the Department of Budget and Finance of the State of Hawaii (DBF) for the benefit of Hawaiian Electric and Hawaii Electric Light, issued, at par: Refunding Series 2019 Special Purpose Revenue Bonds Aggregate principal amount $150 million Fixed coupon interest rate 3.20% Maturity date July 1, 2039 DBF loaned the proceeds to: Hawaiian Electric $90 million Hawaii Electric Light $60 million On July 26, 2019, proceeds from the sale were applied to redeem at par, bonds previously issued by the DBF for the benefit of Hawaiian Electric and Hawaii Electric Light: Series 2009 Special Purpose Revenue Bonds Redeemed Aggregate principal amount $150 million Fixed coupon interest rate 6.50% Maturity date July 1, 2039 Principal amount by company: Hawaiian Electric $90 million Hawaii Electric Light $60 million On October 10, 2019, the DBF for the benefit of Hawaiian Electric, Hawaii Electric Light and Maui Electric, issued, at par: Series 2019 Special Purpose Revenue Bonds Aggregate principal amount $80 million Fixed coupon interest rate 3.50% Maturity date October 1, 2049 DBF loaned the proceeds to: Hawaiian Electric $70 million Hawaii Electric Light $2.5 million Maui Electric $7.5 million Proceeds from the Series 2019 Special Purpose Revenue Bonds will be used only to finance capital expenditures, including reimbursements to the Companies for previously incurred approved capital expenditures. The undrawn funds are deposited with a trustee and earn interest at market rates. As of December 31, 2019 , Hawaiian Electric and Hawaii Electric Light had $30.8 million and $0.1 million of undrawn funds remaining with the trustee, respectively. Maui Electric received all bond proceeds at closing and had no undrawn funds as of December 31, 2019 . Undrawn funds are included in restricted cash in the consolidated balance sheets. (See Note 1 ). On December 31, 2019 , Hawaiian Electric and Maui Electric wired approximately $84 million to pay off the Series 2012B senior note ( $62 million for Hawaiian Electric, $20 million for Maui Electric, and approximately $2 million

Shareholders' equity

Shareholders' equity	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Shareholders' equity	Note 7 · Shareholders’ equity Reserved shares. As of December 31, 2019 , HEI had reserved a total of 18.5 million shares of common stock for future issuance under the HEI Dividend Reinvestment and Stock Purchase Plan (DRIP), the Hawaiian Electric Industries Retirement Savings Plan (HEIRSP), the HEI 2011 Nonemployee Director Stock Plan, the ASB 401(k) Plan and the 2010 Executive Incentive Plan. Accumulated other comprehensive income/(loss). Changes in the balances of each component of accumulated other comprehensive income/(loss) (AOCI) were as follows: HEI Consolidated Hawaiian Electric Consolidated (in thousands) Net unrealized gains (losses) on securities Unrealized gains (losses) on derivatives Retirement benefit plans AOCI Unrealized gains (losses) on derivatives Retirement benefit plans AOCI Balance, December 31, 2016 $ (7,931 ) $ (454 ) $ (24,744 ) $ (33,129 ) $ (454 ) $ 132 $ (322 ) Current period other comprehensive income (loss) and reclassifications, net of taxes (4,370 ) 454 2,544 (1,372 ) 454 (1,142 ) (688 ) Reclass of AOCI for tax rate reduction impact 1 (2,650 ) — (4,790 ) (7,440 ) — (209 ) (209 ) Balance, December 31, 2017 (14,951 ) — (26,990 ) (41,941 ) — (1,219 ) (1,219 ) Current period other comprehensive income (loss) and reclassifications, net of taxes (9,472 ) (436 ) 1,239 (8,669 ) — 1,318 1,318 Balance, December 31, 2018 (24,423 ) (436 ) (25,751 ) (50,610 ) — 99 99 Current period other comprehensive income (loss) and reclassifications, net of taxes 26,904 (1,177 ) 4,844 30,571 — (1,378 ) (1,378 ) Balance, December 31, 2019 $ 2,481 $ (1,613 ) $ (20,907 ) $ (20,039 ) $ — $ (1,279 ) $ (1,279 ) 1 The Company and the Utilities adopted ASU No. 2018-02 as of the beginning of the fourth quarter of 2017 and elected to reclassify the income tax effects of the Tax Act from AOCI to retained earnings. Other than this reclassification to retained earnings, the Company and the Utilities release the income tax effects in AOCI from AOCI when the specific AOCI items (e.g., on a security-by-security basis for ASB’s gains/losses on investment securities) are included in net income. Reclassifications out of AOCI were as follows: Amount reclassified from AOCI Affected line item in the Statement of Income/Balance Sheet Years ended December 31 2019 2018 2017 (in thousands) HEI consolidated Net realized gains on securities included in net income $ (478 ) $ — $ — Revenues-bank (gains on sale of investment securities, net) Derivatives qualifying as cash flow hedges: Window forward contracts — — 454 Property, plant and equipment-electric utilities (2017) Retirement benefit plans: Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost 10,107 21,015 15,737 See Note 10 for additional details Impact of D&Os of the PUC included in regulatory assets (16,177 ) 8,325 (78,724 ) See Note 10 for additional details Total reclassifications $ (6,548 ) $ 29,340 $ (62,533 ) Hawaiian Electric consolidated Derivatives qualifying as cash flow hedges Window forward contracts $ — $ — $ 454 Property, plant and equipment (2017) Retirement benefit plans: Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost 9,550 19,012 14,477 See Note 10 for additional details Impact of D&Os of the PUC included in regulatory assets (16,177 ) 8,325 (78,724 ) See Note 10 for additional details Total reclassifications $ (6,627 ) $ 27,337 $ (63,793 )

Leases (Notes)

Leases (Notes)	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Leases	Note 8 · Leases The Company adopted ASU No. 2016-02 and related amendments on January 1, 2019, and used the effective date as the date of initial application. The Company elected the practical expedient package under which the Company did not reassess its prior conclusions about whether any expired or existing contracts are or contain leases, whether there is a change in lease classification for any expired or existing leases under the new standard, or whether there were initial direct costs for any existing leases that would be treated differently under the new standard. The Company elected the short-term lease recognition exemption for all of its leases that qualify, and accordingly, does not recognize lease liabilities and ROU assets for all leases that have lease terms that are 12 months or less. The amounts related to short-term leases are not material. The Company elected the practical expedient to not separate lease and non-lease components for its real estate and equipment and fossil fuel and renewable energy PPAs . The Company elected the practical expedient to not assess all existing land easements that were not previously accounted for in accordance with ASC 840. The Company leases certain real estate and equipment for various terms under long-term operating lease agreements. The agreements expire at various dates through 2054 and provide for renewal options up to 10 years . The periods associated with the renewal options are excluded for the purpose of determining the lease term unless the exercise of the renewable option is reasonably certain. In the normal course of business, it is expected that many of these agreements will be replaced by similar agreements. Certain real estate leases require the Company to pay for operating expenses such as common area maintenance, real estate taxes and insurance, which are recognized as variable lease expense when incurred and are not included in the measurement of the lease liability. Additionally, the Utilities contract with independent power producers to supply energy under long-term power purchase agreements. Certain PPAs are treated as operating leases under the new standard because the Company elected the practical expedient package under which prior conclusions about lease identification were not reassessed. The fixed capacity payments under the PPAs are included in the lease liability, while the variable lease payments (e.g., payments based on kWh) are excluded from the lease liability. Several as-available PPAs have variable-only payment terms based on production. For PPAs with no minimum lease payments, the Utilities do not recognize any lease liabilities or ROU assets, and the related costs are reported as variable lease costs. In August 2019, Hawaiian Electric entered into a lease agreement for a total office space of approximately 195,000 square feet in downtown Honolulu to lower costs and bring together office workers currently in separate leased buildings. The lease consists of two different phases with commencement dates of January 2020 and January 2021, respectively, and is an operating lease for a term of 12 years with various options to extend up to 10 years . Annual base rent expense for each phase is approximately $1.9 million and $1.7 million , respectively, and the operating lease liability recorded upon commencement of the first phase of the lease was $21 million and the operating lease liability to be recorded upon commencement of the second phase is approximately $19 million . In addition to the annual base rent payments that are included in the lease liability, there are additional payments for operating expenses, which are recognized as variable lease cost when incurred. These payments are related to operating expenses, such as common area maintenance, various taxes and insurance. Under the terms of the lease, Hawaiian Electric is entitled to receive up to $5.0 million and $4.6 million in reimbursements for various office improvements for each phase, respectively. The amounts are to be included as a reduction to the initial measurement of the ROU asset on each respective commencement date, and will be subsequently adjusted if the actual reimbursements are different from the initial amounts previously recognized. The Utilities’ lease payments for each operating lease agreement were discounted using its estimated unsecured borrowing rates for the appropriate term, reduced for the estimated impact of collateral, which is a reduction of approximately 15 basis points. ASB’s lease payments for each operating lease agreement were discounted using Federal Home Loan Bank of Des Moines (FHLB) fixed rate advance rates, which are collateralized, for the appropriate term. The FHLB is ASB’s primary wholesale funding source and can provide collateralized borrowing rates for various terms starting at overnight borrowings to 30 -year borrowing terms. Amounts related to the Company’s total lease cost and cash flows arising from lease transaction are as follows: HEI consolidated Hawaiian Electric consolidated Year ended December 31, 2019 Other leases PPAs classified as leases Total Other leases PPAs classified as leases Total (dollars in thousands) Operating lease cost $ 10,265 $ 63,319 $ 73,584 $ 4,955 $ 63,319 $ 68,274 Variable lease cost 13,034 192,138 205,172 10,272 192,138 202,410 Total lease cost $ 23,299 $ 255,457 $ 278,756 $ 15,227 $ 255,457 $ 270,684 Other information Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases $ 10,447 $ 62,594 $ 73,041 $ 5,768 $ 62,594 $ 68,362 Weighted-average remaining lease term—operating leases (in years) 6.5 2.8 3.5 4.5 2.8 2.9 Weighted-average discount rate—operating leases 3.50 % 4.08 % 3.96 % 4.11 % 4.08 % 4.08 % The following table summarizes the maturity of our operating lease liabilities as of December 31, 2019 : HEI consolidated Hawaiian Electric consolidated (in millions) Other leases PPAs classified as leases Total Other leases PPAs classified as leases Total 2020 $ 12 $ 63 $ 75 $ 7 $ 63 $ 70 2021 10 63 73 5 63 68 2022 6 42 48 3 42 45 2023 5 — 5 2 — 2 2024 4 — 4 1 — 1 Thereafter 9 — 9 2 — 2 Total lease payments 46 168 214 20 168 188 Less: Imputed interest (5 ) (9 ) (14 ) (2 ) (9 ) (11 ) Total present value of lease payments 1 $ 41 $ 159 $ 200 $ 18 $ 159 $ 177 1 The fixed capacity payment related to the existing PPA with PGV, which will expire on December 31, 2027, is not included as a lease liability as of December 31, 2019 as the facility has been offline since May 2018 due to lava flow on Hawaii Island. The annual capacity payment is approximately $7 million . The lease liability will be remeasured when PGV is back in service. The future minimum lease obligations under operating leases in effect as of December 31, 2018, having a term in excess of one year as determined prior to the adoption of ASC 842 are as follows: HEI consolidated Hawaiian Electric consolidated (in millions) Other leases PPAs classified as leases Total Other leases PPAs classified as leases Total 2019 $ 11 $ 63 $ 74 $ 6 $ 63 $ 69 2020 9 63 72 6 63 69 2021 8 63 71 5 63 68 2022 5 42 47 2 42 44 2023 4 — 4 2 — 2 Thereafter 12 — 12 3 — 3 Total lease payments $ 49 $ 231 $ 280 $ 24 $ 231 $ 255 HEI’s consolidated operating lease expense prior to the adoption of ASC 842 was $21 million and $20 million in 2018 and 2017, respectively. The Utilities’ operating lease expense prior to the adoption of ASC 842 was $11 million

Revenues

Revenues	12 Months Ended
	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Revenues	Note 9 · Revenues Revenue from contracts with customers. The revenues subject to Topic 606 include the Utilities’ electric energy sales revenue and the ASB’s transaction fees, as further described below. Electric Utilities . Electric energy sales . Electric energy sales represent revenues from the generation and transmission of electricity to customers under tariffs approved by the PUC. Transaction pricing for electricity is determined and approved by the PUC for each rate class and includes revenues from the base electric charges, which are composed of (1) the customer, demand, energy, and minimum charges, and (2) the power factor, service voltage, and other adjustments as provided in each rate and rate rider schedule. The Utilities satisfy performance obligations over time, i.e., the Utilities generate and transfer control of the electricity over time as the customer simultaneously receives and consumes the benefits provided by the Utilities’ performance. Payments from customers are generally due within 30 days from the end of the billing period. As electric bills to customers reflect the amount that corresponds directly with the value of the Utilities’ performance to date, the Utilities have elected to use the right to invoice practical expedient, which entitles them to recognize revenue in the amount they have the right to invoice. The Utilities’ revenues include amounts for recovery of various Hawaii state revenue taxes. Revenue taxes are generally recorded as an expense in the year the related revenues are recognized. For 2019, 2018 and 2017, the Utilities’ revenues include recovery of revenue taxes of approximately $226 million , $226 million and $202 million , respectively, which amounts are in “Taxes, other than income taxes” expense. However, the Utilities pay revenue taxes to the taxing authorities based on (1) the prior year’s billed revenues (in the case of public service company taxes and PUC fees) in the current year or (2) the current year’s cash collections from electric sales (in the case of franchise taxes) after year end. As of December 31, 2019 and 2018, the Utilities had recorded $132 million and $130 million , respectively, in “Taxes accrued, including revenue taxes” on the Utilities’ consolidated balance sheet for amounts previously collected from customers or accrued for public service company taxes and PUC fees, net of amounts paid to the taxing authorities. Such amounts will be used to pay public service company taxes and PUC fees owed for the following year. Bank . Bank fees. Bank fees are primarily transaction-based and are recognized when the transaction has occurred and the performance obligation satisfied. From time to time, customers will request a fee waiver and ASB may grant reversals of fees. Revenues are not recorded for the estimated amount of fee reversals for each period. Under the new standard, certain fees paid to third parties that were previously recognized as a component of noninterest expense are now netted with fee income. The change in presentation will have no effect on the reported amount of operating income. Fees from other financial services - These fees primarily include debit card interchange income and fees, automated teller machine fees, credit card interchange income and fees, check ordering fees, wire fees, safe deposit rental fees, corporate/business fees, merchant income, online banking fees and international banking fees. Amounts paid to third parties for payment network expenses are included in this financial statement caption in ASB’s Statements of Income and Comprehensive Income Data (in Revenues—Bank financial statement caption of HEI’s Consolidated Statements of Income). Previously, these expenses were recorded in the other expense financial statement caption of ASB’s Statements of Income and Comprehensive Income Data (in Expenses—Bank financial statement caption of HEI’s Consolidated Statements of Income). Fee income on deposit liabilities - These fees primarily include “not sufficient funds” fees, monthly deposit account service charge fees, commercial account analysis fees and other deposit fees. Fee income on other financial products - These fees primarily include commission income from the sales of annuity, mutual fund, and life insurance products. In 2017, ASB began offering a fee-based, managed account product in which income is based on a percentage of assets under management. ASB satisfies its performance obligations under the managed account arrangement over time, and consequently, fees for assets under management are recognized over time as the customer simultaneously receives and consumes the benefit of asset management services. Fees recognized to date from the managed account product were minimal. Revenues from other sources. Revenues from other sources not subject to Topic 606 are accounted for as follows: Electric Utilities . Regulatory revenues . Regulatory revenues primarily consist of revenues from decoupling mechanism, cost recovery surcharges and the Tax Act adjustments. Decoupling mechanism - Under the decoupling mechanism, the Utilities are allowed to recover or obligated to refund the difference between actual revenue and the target revenue as determined by the PUC, collect revenue adjustment mechanism and major project interim recovery revenues, and recover or refund performance incentive mechanism penalties or rewards. These adjustments will be reflected in tariffs in future periods. Under the decoupling tariff approved in 2011, the prior year accrued RBA revenues and the annual RAM amount are billed from June 1 of each year through May 31 of the following year, which is within 24 months following the end of the year in which they are recorded as required by the accounting standard for alternative revenue programs. Cost recovery surcharges - For the timely recovery of additional costs incurred, and reconciliation of costs and expenses included in tariffed rates, the Utilities recognize revenues under surcharge mechanisms approved by the PUC. These will be reflected in tariffs in future periods (e.g., ECRC and PPAC). Tax Act adjustments - These represent adjustments to revenues for the amounts included in tariffed revenues that will be returned to customers as a result of the Tax Act. Since revenue adjustments discussed above resulted from either agreements with the PUC or change in tax law, rather than contracts with customers, they are not subject to the scope of Topic 606. Also, see Notes 1 , 3 and 12 of the Consolidated Financial Statements. The Utilities have elected to present these revenue adjustments on a gross basis, which results in the amounts being billed to customers presented in revenues from contracts with customers and the amortization of the related regulatory asset/liability as revenues from other sources. Depending on whether the previous deferral balance being amortized was a regulatory asset or regulatory liability, and depending on the size and direction of the current year deferral of surcharges and/or refunds to customers, it could result in negative regulatory revenue during the year. Utility pole attachment fees . These fees primarily represent revenues from third-party companies for their access to and shared use of Utilities-owned poles through licensing agreements. As the shared portion of the utility pole is functionally dependent on the rest of the structure, no distinct goods appear to exist. Therefore, these fees are not subject to the scope of Topic 606, but recognized in accordance with ASC Topic 610, Other Income . Bank . Interest and dividend income . Interest and fees on loans are recognized in accordance with ASC Topic 310, Receivables , including the related allowance for loan losses. Interest and dividends on investment securities are recognized in accordance with ASC Topic 320, Investments-Debt and Equity Securities. See Notes 1 and 4 of the Consolidated Financial Statements. Other bank noninterest income . Other bank noninterest income primarily consists of mortgage banking income and bank-owned life insurance income. Mortgage banking income - Mortgage banking income consists primarily of realized and unrealized gains on sale of loans accounted for pursuant to ASC Topic 860, Transfers and Servicing . Interest rate lock commitments and forward loan sales are considered derivatives and are accounted pursuant to ASC Topic 815, Derivatives and Hedging . Bank-Owned Life Insurance (BOLI) - The recognition of BOLI cash surrender value does not represent a contract with a customer and is accounted for in accordance with Emerging Issues Task Force Issue 06-05, Accounting for Purchases of Life Insurance-Determining the Amount that Could be Realized in Accordance with FASB Technical Bulletin No. 85-4, Accounting for Purchases of Life Insurance . Revenue disaggregation. The following tables disaggregate revenues by major source, timing of revenue recognition, and segment: Year ended December 31, 2019 Year ended December 31, 2018 (in thousands) Electric utility Bank Other Total Electric utility Bank Other Total Revenues from contracts with customers Electric energy sales - residential $ 807,652 $ — $ — $ 807,652 $ 801,846 $ — $ — $ 801,846 Electric energy sales - commercial 846,110 — — 846,110 853,672 — — 853,672 Electric energy sales - large light and power 905,308 — — 905,308 894,770 — — 894,770 Electric energy sales - other 16,296 — — 16,296 17,243 — — 17,243 Bank fees — 46,659 — 46,659 — 47,300 — 47,300 Total revenues from contracts with customers 2,575,366 46,659 — 2,622,025 2,567,531 47,300 — 2,614,831 Revenues from other sources Regulatory revenue (54,101 ) — — (54,101 ) (37,687 ) — — (37,687 ) Bank interest and dividend income — 266,554 — 266,554 — 258,225 — 258,225 Other bank noninterest income — 15,357 — 15,357 — 8,750 — 8,750 Other 24,677 — 89 24,766 16,681 — 49 16,730 Total revenues from other sources (29,424 ) 281,911 89 252,576 (21,006 ) 266,975 49 246,018 Total revenues $ 2,545,942 $ 328,570 $ 89 $ 2,874,601 $ 2,546,525 $ 314,275 $ 49 $ 2,860,849 Timing of revenue recognition Services/goods transferred at a point in time $ — $ 46,659 $ — $ 46,659 $ — $ 47,300 $ — $ 47,300 Services/goods transferred over time 2,575,366 — — 2,575,366 2,567,531 — — 2,567,531 Total revenues from contracts with customers $ 2,575,366 $ 46,659 $ — $ 2,622,025 $ 2,567,531 $ 47,300 $ — $ 2,614,831 There are no material contract assets or liabilities associated with revenues from contracts with customers existing at December 31, 2018 or December 31, 2019 . Accounts receivable and unbilled revenues related to contracts with customers represent an unconditional right to consideration since all performance obligations have been satisfied. These amounts are disclosed as accounts receivable and unbilled revenues, net on HEI’s consolidated balance sheets and customer accounts receivable, net and accrued unbilled revenues, net on Hawaiian Electric’s consolidated balance sheets. As of December 31, 2019 , the Company had no material remaining performance obligations due to the nature of the Company’s contracts with its customers. For the Utilities, performance obligations are fulfilled as electricity is delivered to customers. For ASB, fees are recognized when a transaction is completed.

Retirement benefits

Retirement benefits	12 Months Ended
	Dec. 31, 2019
Retirement Benefits [Abstract]
Retirement benefits	Note 10 · Retirement benefits Defined benefit plans. Substantially all of the employees of HEI and the Utilities participate in the Retirement Plan for Employees of Hawaiian Electric Industries, Inc. and Participating Subsidiaries (HEI Pension Plan). Substantially all of the employees of ASB participated in the American Savings Bank Retirement Plan (ASB Pension Plan) until it was frozen on December 31, 2007. The HEI Pension Plan and the ASB Pension Plan (collectively, the Plans) are qualified, noncontributory defined benefit pension plans and include, in the case of the HEI Pension Plan, benefits for utility union employees determined in accordance with the terms of the collective bargaining agreements between the Utilities and the union. The Plans are subject to the provisions of ERISA. In addition, some current and former executives and directors of HEI and its subsidiaries participate in noncontributory, nonqualified plans (collectively, Supplemental Plans). In general, benefits are based on the employees’ or directors’ years of service and compensation. The continuation of the Plans and the Supplemental Plans and the payment of any contribution thereunder are not assumed as contractual obligations by the participating employers. The Supplemental Plan for directors has been frozen since 1996. The ASB Pension Plan was frozen as of December 31, 2007. The HEI Supplemental Executive Retirement Plan and ASB Supplemental Executive Retirement, Disability, and Death Benefit Plan (noncontributory, nonqualified, defined benefit plans) were frozen as of December 31, 2008. No participants have accrued any benefits under these plans after the respective plan’s freeze and the plans will be terminated at the time all remaining benefits have been paid. Each participating employer reserves the right to terminate its participation in the applicable plans at any time, and HEI and ASB reserve the right to terminate their respective plans at any time. If a participating employer terminates its participation in the Plans, the interest of each affected participant would become 100% vested to the extent funded. Upon the termination of the Plans, assets would be distributed to affected participants in accordance with the applicable allocation provisions of ERISA and any excess assets that exist would be paid to the participating employers. Participants’ benefits in the Plans are covered up to certain limits under insurance provided by the Pension Benefit Guaranty Corporation. Postretirement benefits other than pensions. HEI and the Utilities provide eligible employees health and life insurance benefits upon retirement under the Postretirement Welfare Benefits Plan for Employees of Hawaiian Electric Company, Inc. and participating employers (Hawaiian Electric Benefits Plan). Eligibility of employees and dependents is based on eligibility to retire at termination, the retirement date and the date of hire. The plan was amended in 2011, changing eligibility for certain bargaining unit employees hired prior to May 1, 2011, based on new minimum age and service requirements effective January 1, 2012, per the collective bargaining agreement, and certain management employees hired prior to May 1, 2011 based on new eligibility minimum age and service requirements effective January 1, 2012. The minimum age and service requirements for management and bargaining unit employees hired May 1, 2011 and thereafter have increased and their dependents are not eligible to receive postretirement benefits. Employees may be eligible to receive benefits from the HEI Pension Plan but may not be eligible for postretirement welfare benefits if the different eligibility requirements are not met. The executive death benefit plan was frozen on September 10, 2009 for participants at benefit levels as of that date. The Company’s and Utilities’ cost for OPEB has been adjusted to reflect the plan amendments, which reduced benefits and created prior service credits to be amortized over average future service of affected participants. The amortization of the prior service credit will reduce benefit until the various credit bases are fully recognized. Each participating employer reserves the right to terminate its participation in the Hawaiian Electric Benefits Plan at any time. Balance sheet recognition of the funded status of retirement plans. Employers must recognize on their balance sheets the funded status of defined benefit pension and other postretirement benefit plans with an offset to AOCI in shareholders’ equity (using the projected benefit obligation (PBO) and accumulated postretirement benefit obligation (APBO), to calculate the funded status). The PUC allowed the Utilities to adopt pension and OPEB tracking mechanisms in previous rate cases. The amount of the net periodic pension cost (NPPC) and net periodic benefits costs (NPBC) to be recovered in rates is established by the PUC in each rate case. Under the Utilities’ tracking mechanisms, any actual costs determined in accordance with GAAP that are over/under amounts allowed in rates are charged/credited to a regulatory asset/liability. The regulatory asset/liability for each utility will then be amortized over 5 years beginning with the respective utility’s next rate case. Accordingly, all retirement benefit expenses (except for executive life and nonqualified pension plan expenses, which amounted to $1.1 million and $1.0 million in 2019 and 2018 , respectively) determined in accordance with GAAP will be recovered. Under the tracking mechanisms, amounts that would otherwise be recorded in AOCI (excluding amounts for executive life and nonqualified pension plans), net of taxes, as well as other pension and OPEB charges, are allowed to be reclassified as a regulatory asset, as those costs will be recovered in rates through the NPPC and NPBC in the future. The Utilities have reclassified to a regulatory asset/(liability) charges for retirement benefits that would otherwise be recorded in AOCI (amounting to the elimination of a potential charge to AOCI of $(21.8) million pretax and $11.2 million pretax for 2019 and 2018 , respectively). Under the pension tracking mechanism, the Utilities are required to make contributions to the pension trust in the amount of the actuarially calculated NPPC, except when limited by the ERISA minimum contribution requirements or the maximum contributions imposed by the Internal Revenue Code. Contributions in excess of the calculated NPPC are recorded in a separate regulatory asset. In 2018, the pension tracking mechanism was modified to allow prior year contributions made in excess of NPPC to satisfy future contributions, when the ERISA minimum required contribution is less than NPPC. The Utilities reduced their 2018 contribution for this modification. The OPEB tracking mechanisms generally require the Utilities to make contributions to the OPEB trust in the amount of the actuarially calculated NPBC, (excluding amounts for executive life), except when limited by material, adverse consequences imposed by federal regulations. Future decisions in rate cases could further impact funding amounts. Defined benefit pension and other postretirement benefit plans information. The changes in the obligations and assets of the Company’s and Utilities’ retirement benefit plans and the changes in AOCI (gross) for 2019 and 2018 and the funded status of these plans and amounts related to these plans reflected in the Company’s and Utilities’ consolidated balance sheet as of December 31, 2019 and 2018 were as follows: 2019 2018 (in thousands) Pension benefits Other benefits Pension benefits Other benefits HEI consolidated Benefit obligation, January 1 $ 1,991,384 $ 188,666 $ 2,094,356 $ 212,601 Service cost 62,135 2,209 68,987 2,721 Interest cost 84,267 8,004 77,374 7,933 Actuarial losses (gains) 224,421 25,998 (171,226 ) (25,977 ) Participants contributions — 2,351 — 2,505 Benefits paid and expenses (83,924 ) (11,589 ) (78,107 ) (11,117 ) Benefit obligation, December 31 2,278,283 215,639 1,991,384 188,666 Fair value of plan assets, January 1 1,479,067 173,693 1,618,703 193,995 Actual return on plan assets 354,072 35,525 (101,406 ) (11,846 ) Employer contributions 48,629 — 38,496 — Participants contributions — 2,351 — 2,505 Benefits paid and expenses (82,568 ) (10,738 ) (76,726 ) (10,961 ) Fair value of plan assets, December 31 1,799,200 200,831 1,479,067 173,693 Accrued benefit asset (liability), December 31 $ (479,083 ) $ (14,808 ) $ (512,317 ) $ (14,973 ) Other assets $ 19,396 $ — $ 10,930 $ — Defined benefit pension and other postretirement benefit plans liability (498,479 ) (14,808 ) (523,247 ) (14,973 ) Accrued benefit asset (liability), December 31 $ (479,083 ) $ (14,808 ) $ (512,317 ) $ (14,973 ) AOCI debit, January 1 (excluding impact of PUC D&Os) $ 536,920 $ 1,962 $ 527,830 $ 1,474 Recognized during year – prior service credit 42 1,806 42 1,805 Recognized during year – net actuarial (losses) gains (15,479 ) 13 (30,084 ) (95 ) Occurring during year – net actuarial losses (gains) (17,662 ) 2,829 39,132 (1,222 ) AOCI debit before cumulative impact of PUC D&Os, December 31 503,821 6,610 536,920 1,962 Cumulative impact of PUC D&Os (474,628 ) (7,458 ) (498,944 ) (4,929 ) AOCI debit/(credit), December 31 $ 29,193 $ (848 ) $ 37,976 $ (2,967 ) Net actuarial loss $ 503,813 $ 11,707 $ 536,954 $ 8,865 Prior service cost (gain) 8 (5,097 ) (34 ) (6,903 ) AOCI debit before cumulative impact of PUC D&Os, December 31 503,821 6,610 536,920 1,962 Cumulative impact of PUC D&Os (474,628 ) (7,458 ) (498,944 ) (4,929 ) AOCI debit/(credit), December 31 29,193 (848 ) 37,976 (2,967 ) Income taxes (benefits) (7,677 ) 219 (10,023 ) 765 AOCI debit/(credit), net of taxes (benefits), December 31 $ 21,516 $ (629 ) $ 27,953 $ (2,202 ) As of December 31, 2019 and 2018, the other postretirement benefit plans shown in the table above had ABOs in excess of plan assets. 2019 2018 (in thousands) Pension benefits Other benefits Pension benefits Other benefits Hawaiian Electric consolidated Benefit obligation, January 1 $ 1,837,653 $ 181,162 $ 1,928,648 $ 204,644 Service cost 60,461 2,191 67,359 2,704 Interest cost 77,851 7,673 71,294 7,628 Actuarial losses (gains) 212,310 25,123 (158,258 ) (25,330 ) Participants contributions — 2,311 — 2,472 Benefits paid and expenses (77,060 ) (11,382 ) (71,535 ) (10,958 ) Transfers (311 ) (5 ) 145 2 Benefit obligation, December 31 2,110,904 207,073 1,837,653 181,162 Fair value of plan assets, January 1 1,343,113 170,862 1,468,403 190,814 Actual return on plan assets 326,204 34,928 (91,836 ) (11,625 ) Employer contributions 47,808 — 37,550 — Participants contributions — 2,311 — 2,472 Benefits paid and expenses (76,581 ) (10,532 ) (71,060 ) (10,801 ) Other (127 ) (5 ) 56 2 Fair value of plan assets, December 31 1,640,417 197,564 1,343,113 170,862 Accrued benefit liability, December 31 $ (470,487 ) $ (9,509 ) $ (494,540 ) $ (10,300 ) Other liabilities (short-term) (518 ) (715 ) (512 ) (669 ) Defined benefit pension and other postretirement benefit plans liability (469,969 ) (8,794 ) (494,028 ) (9,631 ) Accrued benefit liability, December 31 $ (470,487 ) $ (9,509 ) $ (494,540 ) $ (10,300 ) AOCI debit, January 1 (excluding impact of PUC D&Os) $ 502,189 $ 1,551 $ 493,464 $ 839 Recognized during year – prior service credit (cost) (7 ) 1,803 (8 ) 1,803 Recognized during year – net actuarial losses (14,658 ) — (27,302 ) (98 ) Occurring during year – net actuarial losses (gains) (9,446 ) 2,376 36,035 (993 ) AOCI debit before cumulative impact of PUC D&Os, December 31 478,078 5,730 502,189 1,551 Cumulative impact of PUC D&Os (474,628 ) (7,458 ) (498,944 ) (4,929 ) AOCI debit/(credit), December 31 $ 3,450 $ (1,728 ) $ 3,245 $ (3,378 ) Net actuarial loss $ 478,069 $ 10,815 $ 502,173 $ 8,439 Prior service cost (gain) 9 (5,085 ) 16 (6,888 ) AOCI debit before cumulative impact of PUC D&Os, December 31 478,078 5,730 502,189 1,551 Cumulative impact of PUC D&Os (474,628 ) (7,458 ) (498,944 ) (4,929 ) AOCI debit/(credit), December 31 3,450 (1,728 ) 3,245 (3,378 ) Income taxes (benefits) (888 ) 445 (836 ) 870 AOCI debit/(credit), net of taxes (benefits), December 31 $ 2,562 $ (1,283 ) $ 2,409 $ (2,508 ) As of December 31, 2019 and 2018 , the other postretirement benefit plan shown in the table above had ABOs in excess of plan assets. Pension benefits . In 2019, investment returns were higher than assumed rates and together with updates to mortality assumptions projected generationally, improved the funded position. Actuarial losses due to demographic experience, including assumption changes, the most significant of which was the decrease in the discount rate used to measure PBO compared to the prior year, partially offset the improvement in funded position. In 2018, actuarial gains due to demographic experience, including assumption changes, the most significant of which was the increase in the discount rate used to measure PBO and updates to mortality assumptions projected generationally improved funded position but investment losses more than offset any improvement resulting in a deterioration in the funded position. Other benefits . In 2019, investment returns were higher than assumed rates, which improved funded position and predominately offset the actuarial losses due to demographic experience, including assumption changes, the most significant of which was the decrease in the discount rate used to measure APBO. Updates to the per capita claims costs also contributed to a deterioration in the funded position. In 2018, actuarial gains due to demographic experience, including assumption changes, the most significant of which was the increase in the discount rate used to measure APBO along with updates to mortality assumptions projected generationally and per capita claims costs improved funded position beyond the deterioration caused by investment losses. The dates used to determine retirement benefit measurements for the defined benefit plans and OPEB were December 31 of 2019 , 2018 and 2017 . For purposes of calculating NPPC and NPBC, the Company and the Utilities have determined the market-related value of retirement benefit plan assets by calculating the difference between the expected return and the actual return on the fair value of the plan assets, then amortizing the difference over future years – 0% in the first year and 25% in each of years two through five – and finally adding or subtracting the unamortized differences for the past four years from fair value. The method includes a 15% range restriction around the fair value of such assets (i.e., 85% to 115% of fair value). A primary goal of the plans is to achieve long-term asset growth sufficient to pay future benefit obligations at a reasonable level of risk. The investment policy target for defined benefit pension and OPEB plans reflects the philosophy that long-term growth can best be achieved by prudent investments in equity securities while balancing overall fund and pension liability volatility by an appropriate allocation to fixed income securities. In order to reduce the level of portfolio risk and volatility in returns, efforts have been made to diversify the plans’ investments by asset class, geographic region, market capitalization and investment style. The asset allocation of defined benefit retirement plans to equity and fixed income securities (excluding cash) and related investment policy targets and ranges were as follows: Pension benefits 1 Other benefits 2 Investment policy Investment policy December 31 2019 2018 Target Range 2019 2018 Target Range Assets held by category Equity securities 71 % 69 % 70 % 65-75 71 % 70 % 70 % 65-75 Fixed income securities 29 31 30 25-35 29 30 30 25-35 100 % 100 % 100 % 100 % 100 % 100 % 1 Asset allocation (excluding cash) is applicable to only HEI and the Utilities. As of December 31, 2019 and 2018 , nearly all of ASB’s pension assets were invested in fixed income securities. 2 Asset allocation (excluding cash) is applicable to only HEI and the Utilities. ASB does not fund its other benefits. Assets held in various trusts for the retirement benefit plans are measured at fair value on a recurring basis and were as follows: Pension benefits Other benefits Fair value measurements using Fair value measurements using (in millions) December 31 Quoted prices in active markets for identical assets Significant other observable inputs Significant unobservable inputs December 31 Level 1 Level 2 Level 3 2019 Equity securities $ 470 $ 470 $ — $ — $ 61 $ 61 $ — $ — Equity index and exchange-traded funds 610 610 — — 69 69 — — Equity investments at net asset value (NAV) 78 — — — 11 — — — Total equity investments 1,158 1,080 — — 141 130 — — Fixed income securities and public mutual funds 353 123 230 — 52 49 2 — Fixed income investments at NAV 245 — — — 4 — — — Total fixed income investments 598 123 230 — 56 49 2 — Cash equivalents at NAV 39 — — — 4 — — — Total 1,795 $ 1,203 $ 230 $ — 201 $ 179 $ 2 $ — Cash, receivables and payables, net 4 — Fair value of plan assets $ 1,799 $ 201 2018 Equity securities $ 507 $ 507 $ — $ — $ 65 $ 65 $ — $ — Equity index and exchange-traded funds 348 348 — — 42 42 — — Equity investments at NAV 65 — — — 10 — — — Total equity investments 920 855 — — 117 107 — — Fixed income securities and public mutual funds 310 123 187 — 47 45 2 — Fixed income investments at NAV 208 — — — 4 — — — Total fixed income investments 518 123 187 — 51 45 2 — Cash equivalents at NAV 36 — — — 5 — — — Total 1,474 $ 978 $ 187 $ — 173 $ 152 $ 2 $ — Cash, receivables and payables, net 5 1 Fair value of plan assets $ 1,479 $ 174 Pension benefits Other benefits Measured at net asset value December 31 Redemption frequency Redemption notice period December 31 Redemption frequency Redemption notice period (in millions) 2019 Non U.S. equity funds (a) $ 78 Daily-Monthly 5-30 days $ 11 Daily-Monthly 5-30 days Fixed income investments (b) 245 Monthly 15 days 4 Monthly 15 days Cash equivalents (c) 39 Daily 0-1 day 4 Daily 0-1 day $ 362 $ 19 2018 Non U.S. equity funds (a) $ 65 Daily-Monthly 5-30 days $ 10 Daily-Monthly 5-30 days Fixed income investments (b) 208 Monthly 15 days 4 Monthly 15 days Cash equivalents (c) 36 Daily 0-1 day 5 Daily 0-1 day $ 309 $ 19 None of the investments presented in the tables above have unfunded commitments. (a) Represents investments in funds that primarily invest in non-U.S., emerging markets equities. Redemption frequency for pension benefits assets as of December 31, 2019 were: daily, 60% and monthly, 40% , and as of December 31, 2018 were daily, 32% and monthly, 68% . Redemption frequency for other benefits assets as of December 31, 2019 were: daily, 59% and monthly, 41% and as of December 31, 2018 were: daily, 27% and monthly, 73% . (b) Represents investments in fixed income securities invested in a US-dollar denominated fund that seeks to exceed the Barclays Capital Long Corporate A or better Index through investments in US-dollar denominated fixed income securities and commingled vehicles. (c) Represents investments in cash equivalent funds. This class includes funds that invest primarily in securities issued or guaranteed by the U.S. government or its agencies or instrumentalities. For pension benefits, the fund may also invest in fixed income securities of investment grade issuers. The fair values of the investments shown in the table above represent the Company’s best estimates of the amounts that would be received upon sale of those assets in an orderly transaction between market participants at that date. Those fair value measurements maximize the use of observable inputs. However, in situations where there is little, if any, market activity for the asset at the measurement date, the fair value measurement reflects the Company’s judgments about the assumptions that market participants would use in pricing the asset. Those judgments are developed by the Company based on the best information available in the circumstances. The fair value of investments measured at net asset value presented in the tables above are intended to permit reconciliation to the fair value of plan assets amounts. The Company used the following valuation methodologies for assets measured at fair value. There have been no changes in the methodologies used at December 31, 2019 and 2018 . Equity securities, equity index and exchange-traded funds, U.S. Treasury fixed income securities and public mutual funds (Level 1) . Equity securities, equity index and exchange-traded funds, U.S. Treasury fixed income securities and public mutual funds are valued at the closing price reported on the active market on which the individual securities or funds are traded. Fixed income securities (Level 2) . Fixed income securities, other than those issued by the U.S. Treasury, are valued based on yields currently available on comparable securities of issuers with similar credit ratings. The following weighted-average assumptions were used in the accounting for the plans: Pension benefits Other benefits December 31 2019 2018 2017 2019 2018 2017 Benefit obligation Discount rate 3.61 % 4.31 % 3.74 % 3.52 % 4.34 % 3.72 % Rate of compensation increase 3.5 3.5 3.5 NA NA NA Net periodic pension/benefit cost (years ended) Discount rate 4.31 3.74 4.26 4.34 3.72 4.22 Expected return on plan assets 1 7.25 7.50 7.50 7.25 7.50 7.50 Rate of compensation increase 2 3.5 3.5 3.5 NA NA NA NA Not applicable 1 HEI’s and Utilities’ plan assets only. For 2019, 2018 and 2017, ASB’s expected return on plan assets was 4.51% , 3.94% and 4.46% , respectively. 2 The Company and the Utilities use a graded rate of compensation increase assumption based on age. The rate provided above is an average across all future years of service for the current population. The Company and the Utilities based their selection of an assumed discount rate for 2020 NPPC and NPBC and December 31, 2019 disclosure on a cash flow matching analysis that utilized bond information provided by Bloomberg for all non-callable, high quality bonds (generally rated Aa or better) as of December 31, 2019 . In selecting the expected rate of return on plan assets for 2020 NPPC and NPBC: a) HEI and the Utilities considered economic forecasts for the types of investments held by the plans (primarily equity and fixed income investments), the Plans’ asset allocations, industry and corporate surveys and the past performance of the plans’ assets in selecting 7.25% and b) ASB considered its liability driven investment strategy in selecting 3.69% , which is consistent with the assumed discount rate as of December 31, 2019 with a 20 basis point active manager premium. For 2019, retirement benefit plans’ assets of HEI and the Utilities had a net return of 24.3% . As of December 31, 2019 , the assumed health care trend rates for 2020 and future years were as follows: medical, 7% , grading down to 5% for 2028 and thereafter; dental, 5% ; and vision, 4% . As of December 31, 2018 , the assumed health care trend rates for 2019 and future years were as follows: medical, 7.25% , grading down to 5% for 2028 and thereafter; dental, 5% ; and vision, 4% . The components of NPPC and NPBC were as follows: Pension benefits Other benefits (in thousands) 2019 2018 2017 2019 2018 2017 HEI consolidated Service cost $ 62,135 $ 68,987 $ 64,906 $ 2,209 $ 2,721 $ 3,374 Interest cost 84,267 77,374 81,185 8,004 7,933 9,453 Expected return on plan assets (111,989 ) (108,953 ) (102,745 ) (12,356 ) (12,908 ) (12,326 ) Amortization of net prior service gain (42 ) (42 ) (55 ) (1,806 ) (1,805 ) (1,793 ) Amortization of net actuarial losses 15,479 30,084 26,496 (13 ) 95 1,130 Net periodic pension/benefit cost 49,850 67,450 69,787 (3,962 ) (3,964 ) (162 ) Impact of PUC D&Os 48,143 25,828 (18,004 ) 3,258 3,842 1,211 Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) $ 97,993 $ 93,278 $ 51,783 $ (704 ) $ (122 ) $ 1,049 Hawaiian Electric consolidated Service cost $ 60,461 $ 67,359 $ 63,059 $ 2,191 $ 2,704 $ 3,353 Interest cost 77,851 71,294 74,632 7,673 7,628 9,115 Expected return on plan assets (104,632 ) (102,368 ) (95,892 ) (12,180 ) (12,713 ) (12,147 ) Amortization of net prior service (gain) cost 7 8 8 (1,803 ) (1,803 ) (1,804 ) Amortization of net actuarial losses 14,658 27,302 24,392 — 98 1,102 Net periodic pension/benefit cost 48,345 63,595 66,199 (4,119 ) (4,086 ) (381 ) Impact of PUC D&Os 48,143 25,828 (18,004 ) 3,258 3,842 1,211 Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) $ 96,488 $ 89,423 $ 48,195 $ (861 ) $ (244 ) $ 830 The Company recorded pension expense of $59 million , $59 million and $33 million and OPEB expense of $(0.1) million , nil and $1.0 million in 2019 , 2018 and 2017 , respectively, and charged the remaining amounts primarily to electric utility plant. The Utilities recorded pension expense of $57 million , $55 million and $30 million and OPEB (income) expense of $(0.3) million , $(0.1) million and $0.8 million in 2019 , 2018 and 2017 , respectively, and charged the remaining amounts primarily to electric utility plant. Additional information on the defined benefit pension plans’ accumulated benefit obligations (ABOs), which do not consider projected pay increases (unlike the PBOs shown in the table above), and pension plans with ABOs and PBOs in excess of plan assets were as follows: HEI consolidated Hawaiian Electric consolidated December 31 2019 2018 2019 2018 (in billions) Defined benefit plans - ABOs $ 2.0 $ 1.7 $ 1.8 $ 1.6 Defined benefit plans with ABO in excess of plan assets ABOs 1.9 1.6 1.8 1.6 Fair value of plan assets 1.7 1.4 1.6 1.3 Defined benefit plans with PBOs in excess of plan assets PBOs 2.2 1.9 2.1 1.8 Fair value of plan assets 1.7 1.4 1.6 1.3 HEI consolidated . The Company estimates that the cash funding for the qualified defined benefit pension plans in 2020 will be $69 million , which should fully satisfy the minimum required contributions to those plans, including requirements of the Utilities’ pension tracking mechanisms and the Plan’s funding policy. The Company’s current estimate of contributions to its other postretirement benefit plans in 2020 is nil . As of December 31, 2019 , the benefits expected to be paid under all retirement benefit plans in 2020 , 2021 , 2022 , 2023 , 2024 and 2025 through 2029 amount to $91 million , $95 million , $99 million , $103 million , $107 million and $593 million , respectively. Hawaiian Electric consolidated . The Utilities estimate that the cash funding for the qualified defined benefit pension plan in 2020 will be $68 million , which should fully satisfy the minimum required contributions to that Plan, including requirements of the pension tracking mechanisms and the Plan’s funding policy. The Utilities’ current estimate of contributions to its other postretirement benefit plans in 2020 is nil . As of December 31, 2019 , the benefits expected to be paid under all retirement benefit plans in 2020 , 2021 , 2022 , 2023 , 2024 and 2025 through 2029 amounted to $84 million , $87 million , $90 million , $93 million , $97 million and $544 million , respectively. Defined contribution plans information. For 2019 , 2018 and 2017 , the Company’s expenses for its defined contribution plans under the HEIRSP and the ASB 401(k) Plan were $7 million , $7 million and $7 million , respectively, and cash contributions were $7 million , $7 million and $6 million , respectively. The Utilities’ expenses and cash contributions for its defined contribution plan under the HEIRSP for 2019 , 2018 and 2017 were $3 million , $2 million and $2 million , respectively.

Share-based compensation

Share-based compensation	12 Months Ended
	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Share-based compensation	Note 11 · Share-based compensation Under the 2010 Equity and Incentive Plan, as amended, HEI can issue shares of common stock as incentive compensation to selected employees in the form of stock options, stock appreciation rights (SARs), restricted shares, restricted stock units, performance shares and other share-based and cash-based awards. The 2010 Equity and Incentive Plan (original EIP) was amended and restated effective March 1, 2014 (EIP) and an additional 1.5 million shares were added to the shares available for issuance under these programs. As of December 31, 2019 , approximately 3.2 million shares remained available for future issuance under the terms of the EIP, assuming recycling of shares withheld to satisfy minimum statutory tax liabilities relating to EIP awards, including an estimated 0.7 million shares that could be issued upon the vesting of outstanding restricted stock units and the achievement of performance goals for awards outstanding under long-term incentive plans (assuming that such performance goals are achieved at maximum levels). Restricted stock units awarded under the 2010 Equity and Incentive Plan in 2019 , 2018 , 2017 and 2016 will vest and be issued in unrestricted stock in four equal annual increments on the anniversaries of the grant date and are forfeited to the extent they have not become vested for terminations of employment during the vesting period, except that pro-rata vesting is provided for terminations due to death, disability and retirement. Restricted stock units expense has been recognized in accordance with the fair-value-based measurement method of accounting. Dividend equivalent rights are accrued quarterly and are paid at the end of the restriction period when the associated restricted stock units vest. Stock performance awards granted under the 2019-2021, 2018-2020 and 2017-2019 long-term incentive plans (LTIP) entitle the grantee to shares of common stock with dividend equivalent rights once service conditions and performance conditions are satisfied at the end of the three -year performance period. LTIP awards are forfeited for terminations of employment during the performance period, except that pro-rata participation is provided for terminations due to death, disability and retirement based upon completed months of service after a minimum of 12 months of service in the performance period. Compensation expense for the stock performance awards portion of the LTIP has been recognized in accordance with the fair-value-based measurement method of accounting for performance shares. Under the 2011 Nonemployee Director Stock Plan (2011 Director Plan), HEI can issue shares of common stock as compensation to nonemployee directors of HEI, Hawaiian Electric and ASB. On June 26, 2019, an additional 300,000 shares were made available for issuance under the 2011 Director Plan. As of December 31, 2019 , there were 310,263 shares remaining available for future issuance under the 2011 Director Plan. Share-based compensation expense and the related income tax benefit were as follows: (in millions) 2019 2018 2017 HEI consolidated Share-based compensation expense 1 $ 10.0 $ 7.8 $ 5.4 Income tax benefit 1.4 1.1 1.9 Hawaiian Electric consolidated Share-based compensation expense 1 3.2 2.7 1.9 Income tax benefit 0.6 0.5 0.7 1 For 2019, 2018 and 2017, the Company has not capitalized any share-based compensation. Stock awards. HEI granted HEI common stock to nonemployee directors under the 2011 Director Plan as follows: (dollars in millions) 2019 2018 2017 Shares granted 36,344 38,821 35,770 Fair value $ 1.6 $ 1.3 $ 1.2 Income tax benefit 0.4 0.3 0.5 The number of shares issued to each nonemployee director of HEI, Hawaiian Electric and ASB is determined based on the closing price of HEI common stock on the grant date. Restricted stock units. Information about HEI’s grants of restricted stock units was as follows: 2019 2018 2017 Shares (1) Shares (1) Shares (1) Outstanding, January 1 200,358 $ 33.05 197,047 $ 31.53 220,683 $ 29.57 Granted 96,565 37.82 93,853 34.12 97,873 33.47 Vested (76,813 ) 32.61 (75,683 ) 30.56 (92,147 ) 28.88 Forfeited (12,469 ) 34.20 (14,859 ) 32.35 (29,362 ) 31.57 Outstanding, December 31 207,641 $ 35.36 200,358 $ 33.05 197,047 $ 31.53 Total weighted-average grant-date fair value of shares granted (in millions) $ 3.7 $ 3.2 $ 3.3 (1) Weighted-average grant-date fair value per share based on the average price of HEI common stock on the date of grant. For 2019 , 2018 and 2017 , total restricted stock units and related dividends that vested had a fair value of $3.2 million , $2.7 million and $3.5 million , respectively, and the related tax benefits were $0.5 million , $0.4 million and $1.1 million , respectively. As of December 31, 2019 , there was $4.8 million of total unrecognized compensation cost related to the nonvested restricted stock units. The cost is expected to be recognized over a weighted-average period of 2.5 years . Long-term incentive plan payable in stock. The 2017-2019, 2018-2020 and 2019-2021 LTIPs provide for performance awards under the EIP of shares of HEI common stock based on the satisfaction of performance goals, including a market condition goal. The number of shares of HEI common stock that may be awarded is fixed on the date the grants are made, subject to the achievement of specified performance levels and calculated dividend equivalents. The potential payout varies from 0% to 200% of the number of target shares, depending on the achievement of the goals. The market condition goal is based on HEI’s total shareholder return (TSR) compared to the Edison Electric Institute Index over the relevant three -year period. The other performance condition goals relate to earnings per share (EPS) growth, return on average common equity (ROACE), Hawaiian Electric’s net income growth, ASB’s efficiency ratio, and Pacific Current’s EBITDA growth and return on average invested capital. LTIP linked to TSR . Information about HEI’s LTIP grants linked to TSR was as follows: 2019 2018 2017 Shares (1) Shares (1) Shares (1) Outstanding, January 1 65,578 $ 38.81 32,904 $ 39.51 83,106 $ 22.95 Granted 35,215 41.07 37,832 38.21 37,204 39.51 Vested (issued or unissued and cancelled) — — — — (83,106 ) 22.95 Forfeited (4,391 ) 39.19 (5,158 ) 38.84 (4,300 ) 39.51 Outstanding, December 31 96,402 $ 39.62 65,578 $ 38.81 32,904 $ 39.51 Total weighted-average grant-date fair value of shares granted (in millions) $ 1.4 $ 1.4 $ 1.5 (1) Weighted-average grant-date fair value per share determined using a Monte Carlo simulation model. The grant date fair values of the shares were determined using a Monte Carlo simulation model utilizing actual information for the common shares of HEI and its peers for the period from the beginning of the performance period to the grant date and estimated future stock volatility and dividends of HEI and its peers over the remaining three -year performance period. The expected stock volatility assumptions for HEI and its peer group were based on the three-year historic stock volatility, and the annual dividend yield assumptions were based on dividend yields calculated on the basis of daily stock prices over the same three -year historical period. The following table summarizes the assumptions used to determine the fair value of the LTIP awards linked to TSR and the resulting fair value of LTIP awards granted: 2019 2018 2017 Risk-free interest rate 2.48 % 2.29 % 1.46 % Expected life in years 3 3 3 Expected volatility 15.8 % 17.0 % 20.1 % Range of expected volatility for Peer Group 15.0% to 73.2% 15.1% to 26.2% 15.4% to 26.0% Grant date fair value (per share) $ 41.07 $ 38.20 $ 39.51 For 2017 , total vested LTIP awards linked to TSR and related dividends had a fair value of $1.9 million and the related tax benefits were $0.7 million . There were no share-based LTIP awards linked to TSR with a vesting date in 2018 or 2019. As of December 31, 2019 , there was $1.4 million of total unrecognized compensation cost related to the nonvested performance awards payable in shares linked to TSR. The cost is expected to be recognized over a weighted-average period of 1.5 years . LTIP awards linked to other performance conditions . Information about HEI’s LTIP awards payable in shares linked to other performance conditions was as follows: 2019 2018 2017 Shares (1) Shares (1) Shares (1) Outstanding, January 1 276,169 $ 33.80 131,616 $ 33.47 109,816 $ 25.18 Granted 140,855 37.78 151,328 34.12 148,818 33.47 Vested — — — — (109,816 ) 25.18 Increase above target (cancelled) 4,314 33.53 13,858 33.49 — — Forfeited (17,570 ) 34.66 (20,633 ) 33.80 (17,202 ) 33.48 Outstanding, December 31 403,768 $ 35.15 276,169 $ 33.80 131,616 $ 33.47 Total weighted-average grant-date fair value of shares granted (at target performance levels) (in millions) $ 5.3 $ 5.2 $ 5.0 (1) Weighted-average grant-date fair value per share based on the average price of HEI common stock on the date of grant. For 2017 , total vested LTIP awards linked to other performance conditions and related dividends had a fair value of $4.2 million and the related tax benefits were $1.6 million . There were no share-based LTIP awards linked to other performance conditions with a vesting date in 2018 or 2019. As of December 31, 2019 , there was $5.1 million of total unrecognized compensation cost related to the nonvested shares linked to performance conditions other than TSR. The cost is expected to be recognized over a weighted-average period of 1.5 years .

Income taxes

Income taxes	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income taxes	Note 12 · Income taxes The components of income taxes attributable to net income for common stock were as follows: HEI consolidated Hawaiian Electric consolidated Years ended December 31 2019 2018 2017 2019 2018 2017 (in thousands) Federal Current $ 28,736 $ 42,903 $ 61,534 $ 21,751 $ 29,649 $ 36,267 Deferred* (4,353 ) (6,099 ) 33,967 (7,793 ) (5,245 ) 35,229 Deferred tax credits, net** 13,410 (12 ) (20 ) 13,155 (12 ) (20 ) 37,793 36,792 95,481 27,113 24,392 71,476 State Current 10,472 17,361 10,076 5,579 13,210 8,947 Deferred (10,732 ) (3,269 ) 3,868 (8,491 ) (2,737 ) 2,808 Deferred tax credits, net** 14,104 (87 ) (32 ) 14,104 (87 ) (32 ) 13,844 14,005 13,912 11,192 10,386 11,723 Total $ 51,637 $ 50,797 $ 109,393 $ 38,305 $ 34,778 $ 83,199 * The 2018 deferred income tax expense includes the final adjustment to reduce the provisional amount recorded in 2017 pursuant to Staff Accounting Bulletin No. 118 (SAB No. 118). See “Major tax developments” disclosure below for details of the accounting for the enactment of the Tax Act. ** Represents 2019 federal and state tax credits, primarily related to the West Loch PV project, deferred and amortized starting in 2020. See West Loch PV Project discussion in Note 3. A reconciliation of the amount of income taxes computed at the federal statutory rate to the amount provided in the consolidated statements of income was as follows: HEI consolidated Hawaiian Electric consolidated Years ended December 31 2019 2018 2017 2019 2018 2017 (in thousands) Amount at the federal statutory income tax rate $ 56,996 $ 53,437 $ 96,796 $ 41,399 $ 37,889 $ 71,801 Increase (decrease) resulting from: State income taxes, net of federal income tax benefit 11,658 11,832 9,789 8,703 8,080 7,584 Net deferred tax asset (liability) adjustment related to the Tax Act (9,255 ) (9,540 ) 13,420 (9,255 ) (9,285 ) 9,168 Other, net (7,762 ) (4,932 ) (10,612 ) (2,542 ) (1,906 ) (5,354 ) Total $ 51,637 $ 50,797 $ 109,393 $ 38,305 $ 34,778 $ 83,199 Effective income tax rate 19.0 % 20.0 % 39.6 % 19.4 % 19.3 % 40.6 % The tax effects of book and tax basis differences that give rise to deferred tax assets and liabilities were as follows: HEI consolidated Hawaiian Electric consolidated December 31 2019 2018 2019 2018 (in thousands) Deferred tax assets Regulatory liabilities, excluding amounts attributable to property, plant and equipment $ 100,427 $ 104,868 $ 100,427 $ 104,868 Operating lease liabilities 51,573 — 45,608 — Allowance for bad debts 14,858 14,647 560 659 Other 1 54,028 46,036 41,181 26,522 Total deferred tax assets 220,886 165,551 187,776 132,049 Deferred tax liabilities Property, plant and equipment related 464,312 437,644 458,349 434,831 Operating lease right-of-use assets 51,542 — 45,608 — Regulatory assets, excluding amounts attributable to property, plant and equipment 33,897 37,345 33,897 37,345 Deferred RAM and RBA revenues — 11,278 — 11,278 Retirement benefits 9,684 20,173 13,072 25,430 Other 40,776 31,629 14,001 6,362 Total deferred tax liabilities 600,211 538,069 564,927 515,246 Net deferred income tax liability $ 379,325 $ 372,518 $ 377,151 $ 383,197 1 As of December 31, 2019, HEI consolidated and Hawaiian Electric consolidated have deferred tax assets of $8.7 million and $6.7 million respectively, relating to the benefit of state tax credit carryforwards of $11.7 million and $9 million respectively. These state tax credit carryforwards primarily relate to the West Loch PV project and do not expire. The Company concluded that as of December 31, 2019, a valuation allowance is not required. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences are deductible. Based upon historical taxable income and projections for future taxable income, management believes it is more likely than not the Company and the Utilities will realize substantially all of the benefits of the deferred tax assets. As of December 31, 2019 and 2018 , valuation allowances for deferred tax benefits were nil . The Utilities are included in the consolidated federal and Hawaii income tax returns of HEI and are subject to the provisions of HEI’s tax sharing agreement, which determines each subsidiary’s (or subgroup’s) income tax return liabilities and refunds on a standalone basis as if it filed a separate return (or subgroup consolidated return). The following is a reconciliation of the Company’s liability for unrecognized tax benefits for 2019 , 2018 and 2017 . HEI consolidated Hawaiian Electric consolidated (in millions) 2019 2018 2017 2019 2018 2017 Unrecognized tax benefits, January 1 $ 2.1 $ 4.0 $ 3.8 $ 1.6 $ 3.5 3.8 Additions based on tax positions taken during the year 0.5 0.3 0.9 0.5 0.3 0.4 Reductions based on tax positions taken during the year — — (0.2 ) — — (0.2 ) Additions for tax positions of prior years 0.1 0.1 — 0.1 0.1 — Reductions for tax positions of prior years (0.2 ) (0.1 ) (0.5 ) (0.2 ) (0.1 ) (0.5 ) Lapses of statute of limitations (0.3 ) (2.2 ) — (0.3 ) (2.2 ) — Unrecognized tax benefits, December 31 $ 2.2 $ 2.1 $ 4.0 $ 1.7 $ 1.6 $ 3.5 At December 31, 2019 and 2018 , there were $0.5 million of unrecognized tax benefits, if recognized, would affect the Company’s annual effective tax rate. As of December 31, 2019 and 2018 , the Utilities had no unrecognized tax benefits that, if recognized, would affect the Utilities’ annual effective tax rate. The Company and Utilities believe that the unrecognized tax benefits will not significantly increase or decrease within the next 12 months. HEI consolidated. The Company recognizes interest accrued related to unrecognized tax benefits in “Interest expense-other than on deposit liabilities and other bank borrowings” and penalties, if any, in operating expenses. In 2019 , 2018 and 2017 , the Company recognized approximately $0.1 million , $(0.1) million and $0.2 million in interest expense. The Company had $0.6 million and $0.4 million of interest accrued as of December 31, 2019 and 2018 , respectively. Hawaiian Electric consolidated. The Utilities recognize interest accrued related to unrecognized tax benefits in “Interest expense and other charges, net” and penalties, if any, in operating expenses. In 2019 , 2018 and 2017 , the Utilities recognized approximately $0.1 million in interest expense. The Utilities had $0.4 million and $0.3 million of interest accrued as of December 31, 2019 and 2018 , respectively. As of December 31, 2019 , the disclosures above present the Company’s and the Utilities’ accruals for potential tax liabilities, which involve management’s judgment regarding the likelihood of the benefit being sustained. The final resolution of uncertain tax positions could result in adjustments to recorded amounts. Based on information currently available, the Company and the Utilities believe these accruals have adequately provided for potential income tax issues with federal and state tax authorities, and that the ultimate resolution of tax issues for all open tax periods will not have a material adverse effect on its results of operations, financial condition or liquidity. IRS examinations have been completed and settled through the tax year 2011 and the statute of limitations has expired for years prior to 2016, leaving subsequent years subject to IRS examination. The tax years 2011 and subsequent are still subject to examination by the Hawaii Department of Taxation. Major tax developments. The changes enacted in the 2017 Tax Cuts and Jobs Act continue to impact corporate taxpayers. The following summarizes the provisions that have a major impact on the Company. Lower tax rate . The corporate income tax rate reduction from 35% to 21% lowered the Company’s effective tax rate in 2018 and the subsequent years. For the regulated Utilities, the excess ADIT resulting from the rate change is being returned to customers over various periods determined with the approval of the PUC. Bonus depreciation . The Tax Act allows 100% bonus depreciation through the end of 2022 for qualified property purchased and placed in service after September 27, 2017. The Tax Act provides that property used in the trade or business of a regulated utility (including the furnishing or selling electrical energy) is not qualified property. However, property placed into service after September 27, 2017 are grandfathered under the pre-Tax Act rules allowing 50% bonus depreciation if subject to written binding purchase contracts prior to September 28, 2017. Other applicable provisions . There are a number of other provisions in the Tax Act that have an impact on the Company, including the repeal of the domestic production activities deduction (DPAD), non-deductibility of transportation fringe benefits excluded from employees income, and the increased limitation on the deductibility of executive compensation. SAB No. 118 . On December 22, 2017, the SEC staff issued SAB No. 118 to address the application of GAAP in situations when a registrant does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the Tax Act. The Company applied the guidance in SAB No. 118 when accounting for enactment date effects of the Tax Act in 2017 and throughout 2018. At December 31, 2017, the Company had not completed its re-measurement of deferred tax assets and liabilities as a result of the reduction in the US federal corporate income tax rate to 21% and, in accordance with SAB No. 118, recorded a provisional amount. The Tax Act’s reduction of the corporate tax rate to 21% resulted in a net deferred tax balance that was in excess of the taxes the Company expected to pay or be refunded in the future when the temporary differences that created these deferred taxes reverse. The excess related to the Utilities’ deferred taxes that were identified to be refunded in rates was reclassified to a regulatory liability and is currently being returned to the customers over various periods of time. The remaining excess was written off through deferred tax expense. Consequently, in 2017, the Company recorded a provisional increase in deferred tax expense of $13.4 million ( $9.2 million at the Utilities). In December 2018, the end date of the measurement period for purposes of SAB No. 118 passed, and consequently, the Company (and Utilities) completed its analysis based on available Treasury and legislative guidance relating to the Tax Act. In 2018, the Company re-measured certain deferred tax assets and liabilities based on the rates at which they were expected to reverse in the future. For the period ended December 31, 2018, the net deferred tax liabilities decreased by $13.9 million ( $13.6 million at the Utilities) with the corresponding net adjustment that decreased deferred tax expense by $5.5 million ( $5.2 million at the Utilities) and increased the regulatory liability by $11.3 million . The decrease in deferred tax expense is included as a component of income tax expense and had the effect of decreasing the effective tax rate in 2018 from 22.1% to 20.0% ( 22.2% to 19.3% at the Utilities).

Cash flows

Cash flows	12 Months Ended
	Dec. 31, 2019
Supplemental Cash Flow Elements [Abstract]
Cash flows	Note 13 · Cash flows Years ended December 31 2019 2018 2017 (in millions) Supplemental disclosures of cash flow information HEI consolidated Interest paid to non-affiliates, net of amounts capitalized $ 107 $ 102 $ 83 Income taxes paid (including refundable credits) 56 72 55 Income taxes refunded (including refundable credits) 4 34 1 Hawaiian Electric consolidated Interest paid to non-affiliates, net of amounts capitalized 68 73 63 Income taxes paid (including refundable credits) 55 64 26 Income taxes refunded (including refundable credits) 4 31 — Supplemental disclosures of noncash activities HEI consolidated Unpaid invoices and accruals for capital expenditures, balance, end of period (investing) 64 59 38 Loans transferred from held for investment to held for sale (investing) — 1 41 Common stock issued (gross) for director and executive/management compensation (financing) 1 5 4 11 Obligations to fund low income housing investments, net (investing) 11 12 13 Transfer of retail repurchase agreements to deposit liabilities (financing) — 102 — Hawaiian Electric consolidated Unpaid invoices and accruals for capital expenditures, balance, end of period (investing) 62 44 38 HEI Consolidated and Hawaiian Electric consolidated Electric utility property, plant and equipment Estimated fair value of noncash contributions in aid of construction (investing) 9 14 18 Acquisition of Hawaiian Telcom’s interest in joint poles (investing) — 48 — 1 The amounts shown represent the market value of common stock issued for director and executive/management compensation and withheld to satisfy statutory tax liabilities.

Regulatory restrictions on net

Regulatory restrictions on net assets	12 Months Ended
	Dec. 31, 2019
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Regulatory restrictions on net assets	Note 14 · Regulatory restrictions on net assets The abilities of certain of HEI’s subsidiaries to pay dividends or make other distributions to HEI are subject to contractual and regulatory restrictions. Under the PUC Agreement, in the event that the consolidated common stock equity of the electric utility subsidiaries falls below 35% of the total capitalization of the electric utilities (including the current maturities of long-term debt, but excluding short-term borrowings), the electric utility subsidiaries would, absent PUC approval, be restricted in their payment of cash dividends to 80% of the earnings available for the payment of dividends in the current fiscal year and preceding five years, less the amount of dividends paid during that period. The PUC Agreement also provides that the foregoing dividend restriction shall not be construed as relinquishing any right the PUC may have to review the dividend policies of the electric utility subsidiaries. As of December 31, 2019 , the consolidated common stock equity of HEI’s electric utility subsidiaries was 56% of their total capitalization (as calculated for purposes of the PUC Agreement). As of December 31, 2019 , Hawaiian Electric and its subsidiaries had common stock equity of $2.0 billion of which approximately $825 million was not available for transfer to HEI in the form of dividends, loans or advances without regulatory approval. The ability of ASB to make capital distributions to HEI and other affiliates is restricted under federal law. Subject to a limited exception for stock redemptions that do not result in any decrease in ASB’s capital and would improve ASB’s financial condition, ASB is prohibited from declaring any dividends, making any other capital distributions, or paying a management fee to a controlling person if, following the distribution or payment, ASB would be deemed to be undercapitalized, significantly undercapitalized or critically undercapitalized. ASB is required to notify the FRB and OCC prior to making any capital distribution (including dividends) to HEI (through ASB Hawaii). All dividends are subject to review by the OCC and FRB and receipt of a letter from the FRB communicating the agencies’ non-objection to the payment of any dividend ASB proposes to declare and pay to ASB Hawaii and HEI. Generally, the FRB and OCC may disapprove or deny ASB’s request to make a capital distribution if the proposed distribution will cause ASB to become undercapitalized, or the proposed distribution raises safety and soundness concerns, or the proposed distribution violates a prohibition contained in any statute, regulation or agreement between ASB and the OCC. As of December 31, 2019 , in order to maintain its “well-capitalized” position, ASB could not transfer approximately $487 million of net assets to HEI. HEI and its subsidiaries are also subject to debt covenants, preferred stock resolutions and the terms of guarantees that could limit their respective abilities to pay dividends. The Company does not expect that the regulatory and contractual restrictions applicable to HEI and/or its subsidiaries will significantly affect the operations of HEI or its ability to pay dividends on its common stock.

Significant group concentration

Significant group concentrations of credit risk	12 Months Ended
	Dec. 31, 2019
Risks and Uncertainties [Abstract]
Significant group concentrations of credit risk	Note 15 · Significant group concentrations of credit risk Most of the Company’s business activity is with customers located in the State of Hawaii. The Utilities are regulated operating electric public utilities engaged in the generation, purchase, transmission, distribution and sale of electricity on the islands of Oahu, Hawaii, Maui, Lanai and Molokai in the State of Hawaii. The Utilities provide the only electric public utility service on the islands they serve. The Utilities extend credit to customers, all of whom reside or conduct business in the State of Hawaii. See Note 3 of the Consolidated Financial Statements for a discussion of the Utilities’ major customers. The International Brotherhood of Electrical Workers Local 1260 represents roughly half of the Utilities’ workforce covered by a collective bargaining agreement that expires on October 31, 2021 . Most of ASB’s financial instruments are based in the State of Hawaii, except for the investment securities it owns. Substantially all real estate loans are collateralized by real estate in Hawaii. ASB’s policy is to require mortgage insurance on all real estate loans with a loan to appraisal ratio in excess of 80% at origination. Pacific Current’s investments are in the State of Hawaii since its strategy is focused on investing in non-regulated renewable energy and sustainable infrastructure in the State of Hawaii.

Fair value measurements

Fair value measurements	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Fair value measurements	Note 16 · Fair value measurements Fair value measurement and disclosure valuation methodology. The following are descriptions of the valuation methodologies used for assets and liabilities recorded at fair value and for estimating fair value for financial instruments not carried at fair value: Short-term borrowings—other than bank . The carrying amount of short-term borrowings approximated fair value because of the short maturity of these instruments. Investment securities . The fair value of ASB’s investment securities is determined quarterly through pricing obtained from independent third-party pricing services or from brokers not affiliated with the trade. Non-binding broker quotes are infrequent and generally occur for new securities that are settled close to the month-end pricing date. The third-party pricing vendors ASB uses for pricing its securities are reputable firms that provide pricing services on a global basis and have processes in place to ensure quality and control. The third-party pricing services use a variety of methods to determine the fair value of securities that fall under Level 2 of ASB’s fair value measurement hierarchy. Among the considerations are quoted prices for similar securities in an active market, yield spreads for similar trades, adjustments for liquidity, size, collateral characteristics, historic and generic prepayment speeds, and other observable market factors. To enhance the robustness of the pricing process, ASB will on a quarterly basis compare its standard third-party vendor’s price with that of another third-party vendor. If the prices are within an acceptable tolerance range, the price of the standard vendor will be accepted. If the variance is beyond the tolerance range, an evaluation will be conducted by ASB and a challenge to the price may be made. Fair value in such cases will be based on the value that best reflects the data and observable characteristics of the security. In all cases, the fair value used will have been independently determined by a third-party pricing vendor or non-affiliated broker. The fair value of the mortgage revenue bonds is estimated using a discounted cash flow model to calculate the present value of future principal and interest payments and, therefore is classified within Level 3 of the valuation hierarchy. Loans held for sale . Residential and commercial loans are carried at the lower of cost or market and are valued using market observable pricing inputs, which are derived from third party loan sales and, therefore, are classified within Level 2 of the valuation hierarchy. Loans held for investment . Fair value of loans held for investment is derived using a discounted cash flow approach which includes an evaluation of the underlying loan characteristics. The valuation model uses loan characteristics which includes product type, maturity dates and the underlying interest rate of the portfolio. This information is input into the valuation models along with various forecast valuation assumptions including prepayment forecasts, to determine the discount rate. These assumptions are derived from internal and third party sources. Since the valuation is derived from model-based techniques, ASB includes loans held for investment within Level 3 of the valuation hierarchy. Impaired loans . At the time a loan is considered impaired, it is valued at the lower of cost or fair value. Fair value is determined primarily by using an income, cost or market approach and is normally provided through appraisals. Impaired loans carried at fair value generally receive specific allocations within the allowance for loan losses. For collateral-dependent loans, fair value is commonly based on recent real estate appraisals. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available. Such adjustments typically result in a Level 3 classification of the inputs for determining fair value. Non-real estate collateral may be valued using an appraisal, net book value per the borrower’s financial statements, or aging reports, adjusted or discounted based on management’s historical knowledge, changes in market conditions from the time of the valuation and management’s expertise and knowledge of the client and client’s business, resulting in a Level 3 fair value classification. Generally, impaired loans are evaluated quarterly for additional impairment and adjusted accordingly. Real estate acquired in settlement of loans . Foreclosed assets are carried at fair value (less estimated costs to sell) and are generally based upon appraisals or independent market prices that are periodically updated subsequent to classification as real estate owned. Such adjustments typically result in a Level 3 classification of the inputs for determining fair value. ASB estimates the fair value of collateral-dependent loans and real estate owned using the sales comparison approach. Mortgage servicing rights . MSRs are capitalized at fair value based on market data at the time of sale and accounted for in subsequent periods at the lower of amortized cost or fair value. MSRs are evaluated for impairment at each reporting date. ASB's MSRs are stratified based on predominant risk characteristics of the underlying loans including loan type and note rate. For each stratum, fair value is calculated by discounting expected net income streams using discount rates that reflect industry pricing for similar assets. Expected net income streams are estimated based on industry assumptions regarding prepayment expectations and income and expenses associated with servicing residential mortgage loans for others. Impairment is recognized through a valuation allowance for each stratum when the carrying amount exceeds fair value, with any associated provision recorded as a component of loan servicing fees included in "Revenues - bank" in the consolidated statements of income. A direct write-down is recorded when the recoverability of the valuation allowance is deemed to be unrecoverable. ASB compares the fair value of MSRs to an estimated value calculated by an independent third-party. The third-party relies on both published and unpublished sources of market related assumptions and its own experience and expertise to arrive at a value. ASB uses the third-party value only to assess the reasonableness of its own estimate. Deposit liabilities . The fair value of fixed-maturity certificates of deposit was estimated by discounting the future cash flows using the rates currently offered for FHLB advances of similar remaining maturities. Deposit liabilities are classified in Level 2 of the valuation hierarchy. Other borrowings . For advances and repurchase agreements, fair value is estimated using quantitative discounted cash flow models that require the use of interest rate inputs that are currently offered for advances and repurchase agreements of similar remaining maturities. The majority of market inputs are actively quoted and can be validated through external sources, including broker market transactions and third party pricing services. Long-term debt—other than bank . Fair value of long-term debt of HEI and the Utilities was obtained from third-party financial services providers based on the current rates offered for debt of the same or similar remaining maturities and from discounting the future cash flows using the current rates offered for debt of the same or similar risks, terms, and remaining maturities. Long-term debt-other than bank is classified in Level 2 of the valuation hierarchy. Interest rate lock commitments (IRLCs) . The estimated fair value of commitments to originate residential mortgage loans for sale is based on quoted prices for similar loans in active markets. IRLCs are classified as Level 2 measurements. Forward sales commitments . To be announced (TBA) mortgage-backed securities forward commitments are classified as Level 1, and consist of publicly-traded debt securities for which identical fair values can be obtained through quoted market prices in active exchange markets. The fair values of ASB’s best efforts and mandatory delivery loan sale commitments are determined using quoted prices in the market place that are observable and are classified as Level 2 measurements. The following table presents the carrying or notional amount, fair value, and placement in the fair value hierarchy of the Company’s financial instruments. For stock in Federal Home Loan Bank, the carrying amount is a reasonable estimate of fair value because it can only be redeemed at par. Estimated fair value (in thousands) Carrying or notional amount Quoted prices in active markets for identical assets (Level 1) Significant other observable inputs (Level 2) Significant unobservable inputs Total December 31, 2019 Financial assets HEI consolidated Available-for-sale investment securities $ 1,232,826 $ — $ 1,204,229 $ 28,597 $ 1,232,826 Held-to-maturity investment securities 139,451 — 143,467 — 143,467 Stock in Federal Home Loan Bank 8,434 — 8,434 — 8,434 Loans, net 5,080,107 — 12,295 5,145,242 5,157,537 Mortgage servicing rights 9,101 — — 12,379 12,379 Derivative assets 25,179 — 300 — 300 Financial liabilities HEI consolidated Deposit liabilities 769,825 — 765,976 — 765,976 Short-term borrowings—other than bank 185,710 — 185,710 — 185,710 Other bank borrowings 115,110 — 115,107 — 115,107 Long-term debt, net—other than bank 1,964,365 2,156,927 2,156,927 Derivative liabilities 51,375 33 2,185 — 2,218 Hawaiian Electric consolidated Short-term borrowings 88,987 — 88,987 — 88,987 Long-term debt, net 1,497,667 — 1,670,189 — 1,670,189 December 31, 2018 Financial assets HEI consolidated Available-for-sale investment securities $ 1,388,533 $ — $ 1,364,897 $ 23,636 $ 1,388,533 Held-to-maturity investment securities 141,875 — 142,057 — 142,057 Stock in Federal Home Loan Bank 9,958 — 9,958 — 9,958 Loans, net 4,792,707 — 1,809 4,800,244 4,802,053 Mortgage servicing rights 8,062 — — 13,618 13,618 Derivative assets 10,180 — 91 — 91 Financial liabilities HEI consolidated Deposit liabilities 827,841 — 817,667 — 817,667 Short-term borrowings—other than bank 73,992 — 73,992 — 73,992 Other bank borrowings 110,040 — 110,037 — 110,037 Long-term debt, net—other than bank 1,879,641 — 1,904,261 — 1,904,261 Derivative liabilities 34,132 34 596 — 630 Hawaiian Electric consolidated Short-term borrowings 25,000 — 25,000 — 25,000 Long-term debt, net 1,418,802 — 1,443,968 — 1,443,968 Fair value measurements on a recurring basis. Assets and liabilities measured at fair value on a recurring basis were as follows: December 31 2019 2018 Fair value measurements using Fair value measurements using (in thousands) Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Available-for-sale investment securities (bank segment) Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies $ — $ 1,026,385 $ — $ — $ 1,161,416 $ — U.S. Treasury and federal agency obligations — 117,787 — — 154,349 — Corporate bonds — 60,057 — — 49,132 — Mortgage revenue bonds — — 28,597 — — 23,636 $ — $ 1,204,229 $ 28,597 $ — $ 1,364,897 $ 23,636 Derivative assets Interest rate lock commitments (bank segment) 1 $ — $ 297 $ — $ — $ 91 $ — Forward commitments (bank segment) 1 — 3 — — — — $ — $ 300 $ — $ — $ 91 $ — Derivative liabilities Interest rate lock commitments (bank segment) 1 $ — $ — $ — $ — $ — $ — Forward commitments (bank segment) 1 33 12 — 34 9 — Interest rate swap (Other segment) 2 — 2,173 — — 587 — $ 33 $ 2,185 $ — $ 34 $ 596 $ — 1 Derivatives are carried at fair value in other assets or other liabilities in the balance sheets with changes in value included in mortgage banking income. 2 Derivatives are included in Other liabilities in the balance sheets. There were no transfers of financial assets and liabilities between Level 1 and Level 2 of the fair value hierarchy during the years ended December 31, 2019 and 2018 . The changes in Level 3 assets and liabilities measured at fair value on a recurring basis were as follows: (in thousands) 2019 2018 Mortgage revenue bonds Balance, January 1 $ 23,636 $ 15,427 Principal payments received — — Purchases 4,961 8,209 Unrealized gain (loss) included in other comprehensive income — — Balance, December 31 $ 28,597 $ 23,636 ASB holds two mortgage revenue bonds issued by the Department of Budget and Finance of the State of Hawaii. The Company estimates the fair value by using a discounted cash flow model to calculate the present value of estimated future principal and interest payments. The unobservable input used in the fair value measurement is the weighted average discount rate. As of December 31, 2019 , the weighted average discount rate was 3.41% which was derived by incorporating a credit spread over the one month LIBOR rate. Significant increases (decreases) in the weighted average discount rate could result in a significantly lower (higher) fair value measurement. Fair value measurements on a nonrecurring basis. Certain assets and liabilities are measured at fair value on a nonrecurring basis and therefore are not included in the tables above. These measurements primarily result from assets carried at the lower of cost or fair value or from impairment of individual assets. The carrying value of assets measured at fair value on a nonrecurring basis were as follows: Fair value measurements using (in thousands) Balance Level 1 Level 2 Level 3 December 31, 2019 Loans $ 25 $ — $ — $ 25 December 31, 2018 Loans 77 — — 77 Real estate acquired in settlement of loans 186 — — 186 For 2019 and 2018 , there were no adjustments to fair value for ASB’s loans held for sale. The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a nonrecurring basis: Significant unobservable input value (1) (dollars in thousands) Fair value Valuation technique Significant unobservable input Range Weighted December 31, 2019 Residential land $ 25 Fair value of property or collateral Appraised value less 7% selling cost N/A (2) N/A (2) Total loans $ 25 December 31, 2018 Home equity lines of credit 77 Fair value of property or collateral Appraised value less 7% selling cost N/A (2) N/A (2) Total loans $ 77 Real estate acquired in settlement of loans $ 186 Fair value of property or collateral Appraised value less 7% selling cost N/A (2) N/A (2) (1) Represent percent of outstanding principal balance. (2) N/A - Not applicable. There is one asset in each fair value measurement type. Significant increases (decreases) in any of those inputs in isolation would result in significantly higher (lower) fair value measurements.

Quarterly information (unaudite

Quarterly information (unaudited)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Quarterly information (unaudited)	Note 17 · Quarterly information (unaudited) Selected quarterly information was as follows: Quarters ended Years ended (in thousands, except per share amounts) March 31 June 30 Sept. 30 Dec. 31 December 31 HEI consolidated 2019 Revenues $ 661,615 $ 715,485 $ 771,535 $ 725,966 $ 2,874,601 Operating income 1 77,937 72,634 97,308 100,795 348,674 Net income 1 46,161 42,985 63,890 66,736 219,772 Net income for common stock 1 45,688 42,512 63,419 66,263 217,882 Basic earnings per common share 1,2 0.42 0.39 0.58 0.61 2.00 Diluted earnings per common share 1,3 0.42 0.39 0.58 0.61 1.99 Dividends per common share 0.32 0.32 0.32 0.32 1.28 2018 Revenues $ 645,874 $ 685,277 $ 768,048 $ 761,650 $ 2,860,849 Operating income 71,889 78,799 98,064 84,604 333,356 Net income 40,720 46,527 66,371 50,046 203,664 Net income for common stock 40,247 46,054 65,900 49,573 201,774 Basic earnings per common share 2 0.37 0.42 0.61 0.46 1.85 Diluted earnings per common share 3 0.37 0.42 0.60 0.45 1.85 Dividends per common share 0.31 0.31 0.31 0.31 1.24 Hawaiian Electric consolidated 2019 Revenues $ 578,495 $ 633,784 $ 688,330 $ 645,333 $ 2,545,942 Operating income 56,560 55,694 71,793 70,331 254,378 Net income 32,625 33,073 47,277 45,860 158,835 Net income for common stock 32,126 32,574 46,779 45,361 156,840 2018 Revenues $ 570,427 $ 608,126 $ 687,409 $ 680,563 2,546,525 Operating income 51,369 55,144 74,036 61,112 241,661 Net income 27,974 31,668 50,210 35,796 145,648 Net income for common stock 27,475 31,169 49,712 35,297 143,653 Note: HEI owns all of Hawaiian Electric’s common stock, therefore per share data for Hawaiian Electric is not meaningful. 1 Operating income for the fourth quarter of 2019 includes gains on property sales totaling $10.8 million , and net income and net income for common stock includes $7.9 million (or $0.07 per share (basic and diluted) at ASB’s 26.8% statutory tax rate). 2 The quarterly basic earnings per common share are based upon the weighted-average number of shares of common stock outstanding in each quarter. 3 The quarterly diluted earnings per common share are based upon the weighted-average number of shares of common stock outstanding in each quarter plus the dilutive incremental shares at quarter end.

SCHEDULE I - CONDENSED FINANCIA

SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT	12 Months Ended
	Dec. 31, 2019
Condensed Financial Information Disclosure [Abstract]
SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT	SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT HAWAIIAN ELECTRIC INDUSTRIES, INC. (PARENT COMPANY) CONDENSED BALANCE SHEETS December 31 2019 2018 (dollars in thousands) Assets Cash and cash equivalents $ 953 $ 3,742 Accounts receivable 779 2,604 Notes receivable from subsidiaries 22,598 20,789 Property, plant and equipment, net 2,931 3,456 Deferred income tax assets 10,754 10,147 Other assets and intercompany receivables 21,770 11,963 Investments in subsidiaries, at equity 2,761,802 2,605,038 Total assets $ 2,821,587 $ 2,657,739 Liabilities and shareholders’ equity Liabilities Accounts payable $ 1,509 $ 2,001 Interest payable 3,041 3,476 Notes payable to subsidiaries — 34 Commercial paper 96,723 48,992 Long-term debt, net 399,064 398,874 Retirement benefits liability 29,367 29,565 Other 11,623 12,517 Total liabilities 541,327 495,459 Shareholders’ equity Preferred stock, no par value, authorized 10,000,000 shares; issued: none — — Common stock, no par value, authorized 200,000,000 shares; issued and outstanding: 108,973,328 1,678,257 1,669,267 Retained earnings 622,042 543,623 Accumulated other comprehensive loss (20,039 ) (50,610 ) Total shareholders’ equity 2,280,260 2,162,280 Total liabilities and shareholders’ equity $ 2,821,587 $ 2,657,739 SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT (continued) HAWAIIAN ELECTRIC INDUSTRIES, INC. (PARENT COMPANY) CONDENSED STATEMENTS OF INCOME Years ended December 31 2019 2018 2017 (in thousands) Revenues $ 777 $ 429 $ 798 Equity in net income of subsidiaries 246,005 226,972 187,097 Expenses: Operating, administrative and general 19,195 19,515 16,578 Depreciation of property, plant and equipment 570 597 548 Taxes, other than income taxes 570 509 496 Total expenses 20,335 20,621 17,622 Income before interest expense and income (taxes) benefits 226,447 206,780 170,273 Retirement defined benefits expense—other than service costs 442 674 1,119 Interest expense 17,930 12,664 9,389 Income before income benefits 208,075 193,442 159,765 Income benefits 9,807 8,332 5,532 Net income $ 217,882 $ 201,774 $ 165,297 HAWAIIAN ELECTRIC INDUSTRIES, INC. (PARENT COMPANY) STATEMENTS OF COMPREHENSIVE INCOME STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY Incorporated by reference are HEI and Subsidiaries’ Statements of Consolidated Comprehensive Income and Consolidated Statements of Changes in Shareholders’ Equity in Part II, Item 8. SCHEDULE I — CONDENSED FINANCIAL INFORMATION OF REGISTRANT (continued) HAWAIIAN ELECTRIC INDUSTRIES, INC. (PARENT COMPANY) CONDENSED STATEMENTS OF CASH FLOWS Years ended December 31 2019 2018 2017 (in thousands) Net cash provided by operating activities $ 131,120 $ 135,470 $ 99,600 Cash flows from investing activities Increase in note receivable from subsidiary (1,187 ) (20,596 ) (70,000 ) Decrease in note receivable from subsidiary — — 66,391 Capital expenditures (47 ) (143 ) (317 ) Investments in subsidiaries (38,935 ) (71,970 ) (22,353 ) Other (1,001 ) 140 (177 ) Net cash used in investing activities (41,170 ) (92,569 ) (26,456 ) Cash flows from financing activities Net increase (decrease) in notes payable to subsidiaries with original maturities of three months or less — (30 ) 98 Net increase (decrease) in short-term borrowings with original maturities of three months or less 47,731 (14,000 ) 62,993 Proceeds from issuance of short-term debt — — 125,000 Repayment of short-term debt — (50,000 ) (75,000 ) Proceeds from issuance of long-term debt — 150,000 150,000 Repayment of long-term debt — — (200,000 ) Withheld shares for employee taxes on vested share-based compensation (997 ) (996 ) (3,828 ) Common stock dividends (139,463 ) (134,987 ) (134,873 ) Other (10 ) (848 ) (756 ) Net cash used in financing activities (92,739 ) (50,861 ) (76,366 ) Net decrease in cash and equivalents (2,789 ) (7,960 ) (3,222 ) Cash and cash equivalents, January 1 3,742 11,702 14,924 Cash and cash equivalents, December 31 $ 953 $ 3,742 $ 11,702 NOTES TO CONDENSED FINANCIAL INFORMATION Basis of Presentation The “Notes to Consolidated Financial Statements” in Part II, Item 8 should be read in conjunction with the above HEI (Parent Company) financial statements. All HEI subsidiaries are reflected in the Condensed Financial Statements under the equity method. Income taxes for equity method investments are included in “Equity in net income of subsidiaries.” Long-term debt The components of long-term debt, net, were as follows: December 31 2019 2018 (dollars in thousands) HEI 2.99% term loan, due 2022 $ 150,000 $ 150,000 HEI 5.67% senior note, due 2021 50,000 50,000 HEI 3.99% senior note, due 2023 50,000 50,000 HEI 4.58% senior notes, due 2025 50,000 50,000 HEI 4.72% senior notes, due 2028 100,000 100,000 Less unamortized debt issuance costs (936 ) (1,126 ) Long-term debt, net $ 399,064 $ 398,874 The aggregate payments of principal required within five years after December 31, 2019 on long-term debt are nil in 2020 , $50 million in 2021 , $150 million in 2022 , $50 million in 2023 , nil for 2024 , and $150 million thereafter. Indemnities As of December 31, 2019 , HEI has a General Agreement of Indemnity in favor of both Liberty Mutual Insurance Company (Liberty) and Travelers Casualty and Surety Company of America (Travelers) for losses in connection with any and all bonds, undertakings or instruments of guarantee and any renewals or extensions thereof executed by Liberty or Travelers, including, but not limited to, a $0.6 million self-insured United States Longshore & Harbor bond and a $0.7 million self-insured automobile bond. Income taxes The Company’s financial reporting policy for income tax allocations is based upon a separate entity concept whereby each subsidiary provides income tax expense (or benefits) as if each were a separate taxable entity. The difference between the aggregate separate tax return income tax provisions and the consolidated financial reporting income tax provision is charged or credited to HEI’s separate tax provision. Dividends from HEI subsidiaries In 2019 , 2018 and 2017 , cash dividends received from subsidiaries were $157 million , $154 million and $125 million , respectively. Supplemental disclosures of noncash activities In 2019 , 2018 and 2017 , $2.3 million , $2.3 million and $2.8 million , respectively, of HEI accounts receivable from ASB Hawaii were reduced with a corresponding reduction in HEI notes payable to ASB Hawaii in noncash transactions. In 2019 , 2018 and 2017 , $2.3 million , $2.3 million and $2.8 million , respectively, were contributed as equity by HEI into ASB Hawaii with a corresponding increase in HEI notes payable to ASB Hawaii in noncash transactions. In 2017, $3.6 million of HEI notes receivable from Hamakua Energy, LLC were converted to equity in a noncash transaction. Under the HEI DRIP, common stock dividends reinvested by shareholders in HEI common stock in noncash transactions was immaterial for 2019 , 2018 and 2017 as HEI satisfied the share purchase requirements of the DRIP in 2019 , 2018 and 2017 through open market purchases of its common stock rather than new issuances.

SCHEDULE II - VALUATION AND QUA

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS	12 Months Ended
	Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS	SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS Years ended December 31, 2019 , 2018 and 2017 Col. A Col. B Col. C Col. D Col. E (in thousands) Additions Description Balance at begin- ning of period Charged to costs and expenses Charged to other accounts Deductions Balance at end of period 2019 Allowance for uncollectible accounts – electric utility $ 1,480 $ 2,106 $ 795 (a) $ 3,004 (b) $ 1,377 Allowance for uncollectible interest – bank $ 373 $ — $ (99 ) $ — $ 274 Allowance for losses for loans – bank $ 52,119 $ 23,480 (c) $ 6,418 (a) $ 28,662 (b) $ 53,355 2018 Allowance for uncollectible accounts – electric utility $ 1,178 $ 2,474 $ (4,099 ) (a), (d) $ (1,927 ) (b),(d) $ 1,480 Allowance for uncollectible interest – bank $ 367 $ — $ 6 $ — $ 373 Allowance for losses for loans – bank $ 53,637 $ 14,745 (c) $ 4,254 (a) $ 20,517 (b) $ 52,119 2017 Allowance for uncollectible accounts – electric utility $ 1,121 $ 1,810 $ 785 (a) $ 2,538 (b),(d) $ 1,178 Allowance for uncollectible interest – bank $ 1,834 $ — $ — $ 1,467 $ 367 Allowance for losses for loans – bank $ 55,533 $ 10,901 (c) $ 4,016 (a) $ 16,813 (b) $ 53,637 Deferred tax valuation allowance – HEI $ 38 $ — $ — $ 38 $ — (a) Primarily recoveries. (b) Bad debts charged off. (c) Represents provision for loan losses. (d) Reclass (reversal) of allowance for one customer account into other long term assets in 2018 and 2017 were $(4,934) , and $841

Summary of significant accoun_2

Summary of significant accounting policies (Policies)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Basis of presentation	In preparing the consolidated financial statements in conformity with accounting principles generally accepted in the United States of America (GAAP), management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities and the reported amounts of revenues and expenses. Actual results could differ significantly from those estimates.
Use of estimates	Material estimates that are particularly susceptible to significant change for HEI and its subsidiaries (collectively, the Company) include the amounts reported as fair value for investment securities (ASB only); pension and other postretirement benefit obligations; contingencies and litigation; income taxes; regulatory assets and liabilities (Utilities only); electric utility unbilled revenues (Utilities only); asset retirement obligations (Utilities only); and allowance for loan losses (ASB only).
Consolidation	The HEI consolidated financial statements include the accounts of HEI and its subsidiaries. The Hawaiian Electric consolidated financial statements include the accounts of Hawaiian Electric and its subsidiaries. When HEI or Hawaiian Electric has a controlling financial interest in another entity (usually, majority voting interest), that entity is consolidated. Investments in companies over which the Company or the Utilities have the ability to exercise significant influence, but not control, are accounted for using the equity method. The consolidated financial statements exclude variable interest entities (VIEs) when the Company or the Utilities are not the primary beneficiaries. In general, significant intercompany amounts are eliminated in consolidation
Cash and cash equivalents	The Utilities consider cash on hand, deposits in banks, money market accounts, certificates of deposit, short-term commercial paper of non-affiliates and liquid investments (with original maturities of three months or less) to be cash and cash equivalents. The Company considers the same items to be cash and cash equivalents as well as ASB’s deposits with the Federal Home Loan Bank (FHLB), federal funds sold (excess funds that ASB loans to other banks overnight at the federal funds rate) and securities purchased under resale agreements with original maturities of three months or less.
Restricted cash	The Utilities consider funds on deposit with trustees, which represent the undrawn proceeds from the issuance of special purpose revenue bonds to be restricted cash because these funds are available only to finance (or reimburse payment of) approved capital expenditures.
Property, plant and equipment	Property, plant and equipment are reported at cost. Self-constructed electric utility plant includes engineering, supervision, administrative and general costs and an allowance for the cost of funds used during the construction period. These costs are recorded in construction in progress and are transferred to utility plant when construction is completed and the facilities are either placed in service or become useful for public utility purposes. Costs for betterments that make utility plant more useful, more efficient, of greater durability or of greater capacity are also capitalized. Upon the retirement or sale of electric utility plant, generally no gain or loss is recognized. The cost of the plant retired is charged to accumulated depreciation. Amounts collected from customers for cost of removal are included in regulatory liabilities.
Depreciation	Depreciation is computed primarily using the straight-line method over the estimated lives of the assets being depreciated. Electric utility plant additions in the current year are depreciated beginning January 1 of the following year in accordance with rate-making. Electric utility plant has lives ranging from 16 to 88 years for production plant, from 10 to 79 years for transmission and distribution plant and from 5 to 65 years
Retirement benefits	Pension and other postretirement benefit costs are charged primarily to expense and electric utility plant (in the case of the Utilities). Funding for the Company’s qualified pension plans (Plans) is based on actuarial assumptions adopted by the Pension Investment Committee administering the Plans. The participating employers contribute amounts to a master pension trust for the Plans in accordance with the funding requirements of the Employee Retirement Income Security Act of 1974, as amended (ERISA), including changes promulgated by the Pension Protection Act of 2006, and considering the deductibility of contributions under the Internal Revenue Code. The Company generally funds at least the net periodic pension cost during the year, subject to ERISA minimum and Internal Revenue Code limits and targeted funded status. Certain health care and/or life insurance benefits are provided to eligible retired employees and the employees’ beneficiaries and covered dependents. The Company generally funds the net periodic postretirement benefit costs other than pensions (except for executive life) for postretirement benefits other than pensions (OPEB), while maximizing the use of the most tax-advantaged funding vehicles, subject to cash flow requirements and reviews of the funded status with the consulting actuary.
Environmental expenditures	The Company and the Utilities are subject to numerous federal and state environmental statutes and regulations. In general, environmental contamination treatment costs are charged to expense. Environmental costs are capitalized if the costs extend the life, increase the capacity, or improve the safety or efficiency of property; the costs mitigate or prevent future environmental contamination; or the costs are incurred in preparing the property for sale. Environmental costs are either capitalized or charged to expense when environmental assessments and/or remedial efforts are probable and the cost can be reasonably estimated. The Utilities review their sites and measure the liability quarterly by assessing a range of reasonably likely costs of each identified site using currently available information, including existing technology, presently enacted laws and regulations, experience gained at similar sites, and the probable level of involvement and financial condition of other potentially responsible parties.
Income taxes	Deferred income tax assets and liabilities are established for the temporary differences between the financial reporting bases and the tax bases of the Company’s and the Utilities’ assets and liabilities at federal and state tax rates expected to be in effect when such deferred tax assets or liabilities are realized or settled. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Valuation allowances are established when necessary to reduce deferred income tax assets to the amount expected to be realized. HEI and the Utilities’ investment tax credits are deferred and amortized over the estimated useful lives of the properties to which the credits relate (and for the Utilities, this treatment is in accordance with Accounting Standards Codification (ASC) Topic 980, “Regulated Operations”). The Utilities are included in the consolidated income tax returns of HEI. However, income tax expense has been computed for financial statement purposes as if each utility filed a separate income tax return and Hawaiian Electric filed a consolidated Hawaiian Electric income tax return. Governmental tax authorities could challenge a tax return position taken by the Company. The Company and the Utilities use a “more-likely-than-not” recognition threshold and measurement standard for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return.
Fair value measurements	Fair value estimates are estimates of the price that would be received to sell an asset, or paid upon the transfer of a liability, in an orderly transaction between market participants at the measurement date. The fair value estimates are generally determined based on assumptions that market participants would use in pricing the asset or liability and are based on market data obtained from independent sources. However, in certain cases, the Company and the Utilities use their own assumptions about market participant assumptions based on the best information available in the circumstances. These valuations are estimates at a specific point in time, based on relevant market information, information about the financial instrument and judgments regarding future expected loss experience, economic conditions, risk characteristics of various financial instruments and other factors. These estimates do not reflect any premium or discount that could result if the Company or the Utilities were to sell its entire holdings of a particular financial instrument at one time. Because no active trading market exists for a portion of the Company’s and the Utilities’ financial instruments, fair value estimates cannot be determined with precision. Changes in the underlying assumptions used, including discount rates and estimates of future cash flows, could significantly affect the estimates. In addition, the tax ramifications related to the realization of the unrealized gains and losses could have a significant effect on fair value estimates, but have not been considered in making such estimates. The Company and the Utilities group their financial assets measured at fair value in three levels outlined as follows: Level 1: Inputs to the valuation methodology are quoted prices, unadjusted, for identical assets or liabilities in active markets. A quoted price in an active market provides the most reliable evidence of fair value and is used to measure fair value whenever available. Level 2: Inputs to the valuation methodology include quoted prices for similar assets or liabilities in active markets; inputs to the valuation methodology include quoted prices for identical or similar assets or liabilities in markets that are not active; or inputs to the valuation methodology that are derived principally from or can be corroborated by observable market data by correlation or other means. Level 3: Inputs to the valuation methodology are unobservable and significant to the fair value measurement. Level 3 assets and liabilities include financial instruments whose value is determined using discounted cash flow methodologies, as well as instruments for which the determination of fair value requires significant management judgment or estimation. Classification in the hierarchy is based upon the lowest level input that is significant to the fair value measurement of the asset or liability. For instruments classified in Level 1 and 2 where inputs are primarily based upon observable market data, there is less judgment applied in arriving at the fair value. For instruments classified in Level 3, management judgment is more significant due to the lack of observable market data. Fair value is also used on a nonrecurring basis to evaluate certain assets for impairment or for disclosure purposes. Examples of nonrecurring uses of fair value include mortgage servicing rights accounted for by the amortization method, loan impairments for certain loans, real estate acquired in settlement of loans, goodwill and asset retirement obligations (AROs).
Earnings per share (HEI only)	Basic earnings per share (EPS) is computed by dividing net income for common stock by the weighted-average number of common shares outstanding for the period. Diluted EPS is computed similarly, except that dilutive common shares for stock compensation is added to the denominator.
Impairment of long-lived assets and long-lived assets to be disposed of	The Company and the Utilities review long-lived assets and certain identifiable intangibles for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to future undiscounted net cash flows expected to be generated by the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. Assets to be disposed of are reported at the lower of the carrying amount or fair value, less costs to sell.
Recent accounting pronouncements	The most significant effect of the new standard relates to the recognition of new ROU assets and lease liabilities on the Company’s balance sheet for purchase power agreements and real estate operating leases. On adoption, the Company recognized additional lease liabilities of approximately $257 million for the Company and approximately $236 million for the Utilities ( $215 million related to PPAs), based on the present value of the remaining minimum rental payments, with corresponding ROU assets for existing operating leases, under current leasing standards. In determining the lease liability upon transition, the Company used the incremental borrowing rates as of the adoption date based on the remaining lease term and remaining lease payments. See Note 8 for more information. Credit losses . In June 2016, the FASB issued ASU No. 2016-13, “ Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments ,” which is intended to improve financial reporting by requiring timelier recording of credit losses on loans and other financial instruments held by financial institutions and other organizations . ASU No. 2016-13 requires the measurement of all expected credit losses for financial assets held at the reporting date (based on historical experience, current conditions and reasonable and supportable forecasts) and enhanced disclosures to help financial statement users better understand significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. In addition, ASU No. 2016-13 amends the accounting for credit losses on available-for-sale (AFS) debt securities and purchased financial assets with credit deterioration. The other-than-temporary impairment model of accounting for credit losses on AFS debt securities will be replaced with an estimate of expected credit losses only when the fair value is below the amortized cost of the asset. The length of time the fair value of an AFS debt security has been below the amortized cost will no longer impact the determination of whether a credit loss exists. The AFS debt security model will also require the use of an allowance to record the estimated losses (and subsequent recoveries). The Company and Utilities will adopt ASU No. 2016-13 using an effective date of January 1, 2020 and will apply the guidance using a modified retrospective basis with the cumulative effect of initially applying the amendments to be recognized in retained earnings as of January 1, 2020. The allowance for credit losses (ACL) is a material estimate of the Company. As a result of the change from an incurred loss model to a methodology that considers the credit loss over the expected life of the loan, the Company expects to record, upon completing its final analysis, an adjustment between $18 million to $22 million to increase the ACL, with a corresponding adjustment to reduce retained earnings as of January 1, 2020. The ACL is based on the composition, characteristics and quality of the loans and off balance sheet credit exposures as well as the prevailing economic conditions as of the adoption date. The increase to the ACL for the loan portfolio will result in a decrease to retained earnings and regulatory capital amounts and ratios. However, ASB expects to remain well capitalized under the regulatory framework after the adoption of ASU No. 2016-13. Based on the credit quality of the Company’s existing held-to-maturity and AFS investment securities portfolio, the Company will not recognize an ACL at adoption for those investments. The adoption of the new standard did not have a material impact to the Utilities’ customer and other accounts receivables and accrued unbilled revenue. Compensation-retirement benefits-defined benefit plans . In August 2018, the FASB issued ASU No. 2018-14, “Compensation-Retirement Benefits-Defined Benefit Plans-General (Subtopic 715-20): Disclosure Framework-Changes to the Disclosure Requirements for Defined Benefit Plans,” which makes minor changes to the disclosure requirements for employers that sponsor defined benefit pension and/or other postretirement benefit plans. The new guidance eliminates requirements for certain disclosures that are no longer considered cost beneficial and requires new ones that the FASB considers pertinent. ASU No. 2018-14 is effective for fiscal years ending after December 15, 2020 . The Company early adopted ASU No. 2018-14, effective for the year ended December 31, 2019, and applied the amended disclosure requirements to all periods presented. See Note 10 for additional information regarding the Company’s employee benefit plans. Codification Improvements . In April 2019, the FASB issued ASU No. 2019-04, “Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments,” which is intended to clarify certain issues related to the accounting for financial instruments. • With respect to Topic 326, Financial Instruments - Credit Losses , ASU No. 2019-04 allows entities to measure the allowance for credit losses on accrued interest receivable balances separately from other components of the amortized cost basis of associated financial assets, or to make an accounting policy election not to measure an allowance for credit losses on accrued interest receivable amounts if an entity writes off the uncollectible accrued interest receivable balance in a timely manner and makes certain disclosures. ASU No. 2019-04 also allows an entity to make an accounting policy election regarding the presentation and disclosure of accrued interest receivables and the related allowance for credit losses for those accrued interest receivables. ASU No. 2019-04 also clarifies certain issues related to transfers between classifications or categories for loans and debt securities, recoveries, variable interest rates and prepayments, vintage disclosures, and contractual extensions and renewal options. • With respect to Topic 815, Derivatives and Hedging , ASU No. 2019-04 provides amendments, among others, that address partial-term fair value hedges, fair value hedge basis adjustments, and certain transition requirements. • With respect to Topic 825, Financial Instruments , ASU No. 2019-04 clarifies the scope of the guidance and disclosure requirements with respect to recognizing and measuring financial instruments. The amended guidance in ASU No. 2019-04 is effective for fiscal years and interim periods beginning after December 15, 2019, with early adoption permitted. The Company adopted ASU No. 2019-04 in the first quarter of 2020 and the impact of the ASU on the Company’s consolidated financial statements was not material.
Reclassifications	Certain reclassifications have been made to prior years’ financial statements to conform to the 2019 presentation, which did not affect previously reported results of operations.
Electric utility
Regulation by the Public Utilities Commission of the State of Hawaii (PUC)	The Utilities are regulated by the PUC and account for the effects of regulation under FASB ASC Topic 980, “Regulated Operations.” As a result, the Utilities’ financial statements reflect assets, liabilities, revenues and expenses based on current cost-based rate-making regulations (see Note 3—“Regulatory assets and liabilities”). Their continued accounting under ASC Topic 980 generally requires that rates are established by an independent, third-party regulator; rates are designed to recover the costs of providing service; and it is reasonable to assume that rates can be charged to, and collected from, customers. The rate schedules of the Utilities include energy costs recovery clauses (ECRCs) under which electric rates are adjusted for changes in the weighted-average price paid for fuel oil and certain components of purchased power, and the relative amounts of company-generated power and purchased power. The rate schedules also include purchased power adjustment clauses (PPACs) under which the remaining purchase power expenses are recovered through surcharge mechanisms. The amounts collected through the ECRCs and PPACs are required to be reconciled quarterly.
Accounts receivable	Accounts receivable are recorded at the invoiced amount. The Utilities generally assess a late payment charge on balances unpaid from the previous month. The allowance for doubtful accounts is the Utilities’ best estimate of the amount of probable credit losses in the Utilities’ existing accounts receivable.
Electric utility revenues	Revenues related to electric service are generally recorded when service is rendered and include revenues applicable to energy consumed in the accounting period but not yet billed to the customers. The Utilities also record revenue under a decoupling mechanism.
Repairs and maintenance costs	Repairs and maintenance costs for overhauls of generating units are generally expensed as they are incurred.
Allowance for funds used during construction (AFUDC)	AFUDC is an accounting practice whereby the costs of debt and equity funds used to finance plant construction are credited on the statement of income and charged to construction in progress on the balance sheet. If a project under construction is delayed for an extended period of time, AFUDC on the delayed project may be stopped after assessing the causes of the delay and probability of recovery.
Bank
Investment securities	Investments in debt securities are classified as held-to-maturity (HTM), trading or available-for-sale (AFS). ASB determines the appropriate classification at the time of purchase. Debt securities that ASB intends to and has the ability to hold to maturity are classified as HTM securities and reported at amortized cost. Marketable debt securities that are bought and held principally for the purpose of selling them in the near term are classified as trading securities and reported at fair value, with unrealized gains and losses included in earnings. Marketable debt securities not classified as either HTM or trading securities are classified as AFS and reported at fair value. Unrealized gains and losses for AFS securities are excluded from earnings and reported on a net basis in accumulated other comprehensive income (AOCI) until realized. Interest income is recorded on an accrual basis. Discounts and premiums on securities are accreted or amortized into interest income using the interest method over the remaining contractual lives of the agency obligation securities and the estimated lives of the mortgage-backed securities adjusted for anticipated prepayments. ASB uses actual prepayment experience and estimates of future prepayments to determine the constant effective yield necessary to apply the interest method of income recognition. The discounts and premiums on the agency obligations portfolio are accreted or amortized on a prospective basis using expected contractual cash flows. The discounts and premiums on the mortgage-backed securities portfolio are accreted or amortized on a retrospective basis using changes in anticipated prepayments. This method requires a retrospective adjustment of the effective yield each time ASB changes the estimated life as if the new estimate had been known since the original acquisition date of the securities. Estimates of future prepayments are based on the underlying collateral characteristics and historic or projected prepayment behavior of each security. The specific identification method is used in determining realized gains and losses on the sales of securities. For securities that are not trading securities, individual securities are assessed for impairment at least on a quarterly basis, and more frequently when economic or market conditions warrant. A security is impaired if the fair value of the security is less than its carrying value at the financial statement date. When a security is impaired, ASB determines whether this impairment is temporary or other-than-temporary. If ASB does not expect to recover the entire amortized cost basis of the security or there is a change in the expected cash flows, an OTTI exists. If ASB intends to sell the security, or will more likely than not be required to sell the security before recovery of its amortized cost, the OTTI must be recognized in earnings. If ASB does not intend to sell the security, and it is not more likely than not that ASB will be required to sell the security before recovery of its amortized cost, the OTTI must be separated into the amount representing the credit loss and the amount related to all other factors. The amount of OTTI related to the credit loss is recognized in earnings, while the remaining OTTI is recognized in AOCI. Based on ASB’s evaluation as of December 31, 2019 , 2018 and 2017 , there was no indicated impairment as ASB expects to collect the contractual cash flows for these investments. Stock in Federal Home Loan Bank (FHLB) is carried at cost and is reviewed at least quarterly for impairment, with valuation adjustments recognized in noninterest income.
Loans	ASB carries loans at amortized cost less the allowance for loan losses, loan origination fees (net of direct loan origination costs), commitment fees and purchase premiums and discounts. Interest on loans is credited to income as it is earned. Discounts and premiums are accreted or amortized over the life of the loans using the interest method. Loan origination fees (net of direct loan origination costs) are deferred and recognized as an adjustment in yield over periods not exceeding the contractual life of the loan using the interest method or taken into income when the loan is paid off or sold. Nonrefundable commitment fees (net of direct loan origination costs, if applicable) received for commitments to originate or purchase loans are deferred and, if the commitment is exercised, recognized as an adjustment of yield over the life of the loan using the interest method. Nonrefundable commitment fees received for which the commitment expires unexercised are recognized as income upon expiration of the commitment.
Loans held for sale, gain on sale of loans, and mortgage servicing assets and liabilities	Loans held for sale are stated at the lower of cost or estimated fair value on an aggregate basis. Premiums, discounts and net deferred loan fees are not amortized while a loan is classified as held for sale. A sale is recognized only when the consideration received is other than beneficial interests in the assets sold and control over the assets is transferred irrevocably to the buyer. Gains or losses on sales of loans are recognized at the time of sale and are determined by the difference between the net sales proceeds and the allocated basis of the loans sold.
Allowance for loan losses	ASB maintains an allowance for loan losses to absorb losses inherent in its loan portfolio. The level of allowance for loan losses is based on a continuing assessment of existing risks in the loan portfolio, historical loss experience, changes in collateral values and current conditions (e.g., economic conditions, real estate market conditions and interest rate environment). The allowance for loan losses is allocated to loan types using both a formula-based approach applied to groups of loans and an analysis of certain individual loans for impairment. The formula-based approach emphasizes loss factors primarily derived from actual historical default and loss rates, which are combined with an assessment of certain qualitative factors to determine the allowance amounts allocated to the various loan categories. Adverse changes in any of these factors could result in higher charge-offs and provision for loan losses. ASB disaggregates its portfolio loans into portfolio segments for purposes of determining the allowance for loan losses. Commercial, commercial real estate, and commercial construction loans are defined as non-homogeneous loans and ASB utilizes a risk rating system for evaluating the credit quality of the loans. Non-homogeneous loans are also categorized into the regulatory asset quality classifications—Pass, Special Mention, Substandard, Doubtful, and Loss based on credit quality. ASB utilizes a numerical-based, risk rating “PD Model” that takes into consideration fiscal year-end financial information of the borrower and identified financial attributes including retained earnings, operating cash flows, interest coverage, liquidity and leverage that demonstrate a strong correlation with default to assign default probabilities at the borrower level. In addition, a loss given default (LGD) value is assigned to each loan to measure loss in the event of default based on loan specific features such as collateral that mitigates the amount of loss in the event of default. Residential, consumer and credit scored business loans are considered homogeneous loans, which are typically underwritten based on common, uniform standards. For the homogeneous portfolio, the quality of the loan is best indicated by the repayment performance of an individual borrower. ASB supplements performance data with external credit bureau data and credit scores such as the Fair Isaac Corporation (FICO) score on a quarterly basis. ASB has built portfolio loss models for each major segment based on the combination of internal and external data to predict the probability of default at the loan level. ASB also considers qualitative factors in determining the allowance for loan losses. These include but are not limited to adjustments for changes in policies and procedures in underwriting, monitoring or collections, economic conditions, portfolio mix, lending and risk management personnel, results of internal audit and quality control reviews, collateral values and any concentrations of credit. The reserve for unfunded commitments is maintained at a level believed by management to be sufficient to absorb estimated probable losses related to unfunded credit facilities and is included in accounts payable and other liabilities in the consolidated balance sheets. The determination of the adequacy of the reserve is based upon an evaluation of the unfunded credit facilities, including an assessment of historical commitment utilization experience, credit risk grading and historical loss rates. This process takes into consideration the same risk elements that are analyzed in the determination of the adequacy of the allowance for loan losses, as discussed above. Net adjustments to the reserve for unfunded commitments are included in other noninterest expense in the consolidated statements of income. The allowance for loan losses is based on currently available information and historical experience, and future adjustments may be required from time to time to the allowance for loan losses based on new information and changes that occur (e.g., due to changes in economic conditions, particularly in Hawaii). Actual losses could differ from management’s estimates, and these differences and subsequent adjustments could be material.
Nonperforming loans	Loans are generally placed on nonaccrual status when contractually past due 90 days or more, or earlier if the probability of collection is insufficient to warrant further accrual. All interest that is accrued but not collected is reversed. A loan may be returned to accrual status if (i) principal and interest payments have been brought current and repayment of the remaining contractual principal and interest is expected to be made, (ii) the loan has otherwise become well-secured and in the process of collection, or (iii) the borrower has been making regularly scheduled payments in full for the prior six months and it is reasonably assured that the loan will be brought fully current within a reasonable period. Cash receipts on nonaccruing loans are generally applied to reduce the unpaid principal balance. Loans considered to be uncollectible are charged-off against the allowance for loan losses. The amount and timing of charge-offs on loans includes consideration of the loan type, length of delinquency, insufficiency of collateral value, lien priority and the overall financial condition of the borrower. Recoveries on loans previously charged-off are credited back to the allowance for loan losses. Loans that have been charged-off against the allowance for loan losses are periodically monitored to evaluate whether further adjustments to the allowance are necessary. Loans in the commercial and commercial real estate portfolio are charged-off when the loan is risk rated “Doubtful” or “Loss.” The loan or a portion thereof is determined to be uncollectible after considering the borrower’s overall financial condition and collateral deficiency. A commercial or commercial real estate loan is considered uncollectible when: (a) the borrower is delinquent in principal or interest 90 days or more; (b) significant improvement in the borrower’s repayment capacity is doubtful; and/or (c) collateral value is insufficient to cover outstanding indebtedness and no other viable assets or repayment sources exist. Loans in the residential mortgage and home equity portfolios are charged-off when the loan or a portion thereof is determined to be uncollectible after considering the borrower’s overall financial condition and collateral deficiency. Such loan is considered uncollectible when: (a) the borrower is delinquent in principal or interest 180 days or more; (b) it is probable that collateral value is insufficient to cover outstanding indebtedness and no other viable assets or repayment sources exist; (c) notification of the borrower’s bankruptcy is received or the borrower’s debt is discharged in bankruptcy and the loan is not reaffirmed; or (d) in cases where ASB is in a subordinate position to other debt, the senior lien holder has foreclosed and ASB’s junior lien is extinguished. Other consumer loans are generally charged-off when the balance becomes 120 days delinquent.
Loans modified in a troubled debt restructuring	Loans are considered to have been modified in a troubled debt restructuring (TDR) when, due to a borrower’s financial difficulties, ASB makes concessions to the borrower that it would not otherwise consider for a non-troubled borrower. Modifications may include interest rate reductions, interest only payments for an extended period of time, protracted terms such as amortization and maturity beyond the customary length of time found in the normal market place, and other actions intended to minimize economic loss and to provide alternatives to foreclosure or repossession of collateral. Generally, a nonaccrual loan that has been modified in a TDR remains on nonaccrual status until the borrower has demonstrated sustained repayment performance for a period of six consecutive months. However, performance prior to the modification, or significant events that coincide with the modification, are included in assessing whether the borrower can meet the new terms and may result in the loan being returned to accrual status at the time of loan modification or after a shorter performance period. If the borrower’s ability to meet the revised payment schedule is uncertain, or there is reasonable doubt over the full collectability of principal and interest, the loan remains on nonaccrual status.
Real estate acquired in settlement of loans	ASB records real estate acquired in settlement of loans at fair value, less estimated selling expenses. ASB obtains appraisals based on recent comparable sales to assist management in estimating the fair value of real estate acquired in settlement of loans. Subsequent declines in value are charged to expense through a valuation allowance. Costs related to holding real estate are charged to operations as incurred.
Goodwill	Goodwill is initially recorded as the excess of the purchase price over the fair value of the net assets acquired in a business combination and is subsequently evaluated at least annually for impairment during the fourth quarter. At December 31, 2019 and 2018 , the amount of goodwill was $82.2 million . The goodwill relates to ASB and is the Company’s only intangible asset with an indefinite useful life.
Mortgage banking	Mortgage loans held for sale are stated at the lower of cost or estimated fair value on an aggregate basis. Premiums, discounts and net deferred loan fees are not amortized while a loan is classified as held-for-sale. A sale is recognized only when the consideration received is other than beneficial interests in the assets sold and control over the assets is transferred irrevocably to the buyer. Gains or losses on sales of loans are recognized at the time of sale and are determined by the difference between the net sales proceeds and the allocated basis of the loans sold. ASB is obligated to subsequently repurchase a loan if the purchaser discovers a standard representation or warranty violation such as noncompliance with eligibility requirements, customer fraud or servicing violations. This primarily occurs during a loan file review. ASB considers and records a reserve for loan repurchases if appropriate. ASB recognizes a mortgage servicing asset when a mortgage loan is sold with servicing rights retained. This mortgage servicing right (MSR) is initially capitalized at its presumed fair value based on market data at the time of sale and accounted for in subsequent periods at the lower of amortized cost or fair value. Mortgage servicing assets or liabilities are included as a component of gain on sale of loans. Under ASC Topic 860, “Transfers and Servicing,” ASB amortizes the MSRs in proportion to and over the period of estimated net servicing income and assess for impairment at each reporting date. ASB’s MSRs are stratified based on predominant risk characteristics of the underlying loans including loan type such as fixed-rate 15- and 30-year mortgages and note rate in bands primarily of 50 to 100 basis points. For each stratum, fair value is calculated by discounting expected net income streams using discount rates that reflect industry pricing for similar assets. Expected net income streams are estimated based on industry assumptions regarding prepayment expectations and income and expenses associated with servicing residential mortgage loans for others. ASB uses a present value cash flow model using techniques described above to estimate the fair value of MSRs. Because observable market prices with exact terms and conditions may not be readily available, ASB compares the fair value of MSRs to an estimated value calculated by an independent third-party on a semi-annual basis. The third-party relies on both published and unpublished sources of market related assumptions and its own experience and expertise to arrive at a value. ASB uses the third-party value only to assess the reasonableness of fair value generated by the valuation model. Impairment is recognized through a valuation allowance for each stratum when the carrying amount exceeds fair value, with any associated provision recorded as a component of loan servicing fees included in “Revenues - bank” in the consolidated statements of income. A direct write-down is recorded when the recoverability of the valuation allowance is deemed to be unrecoverable. Loan servicing fee income represents income earned for servicing mortgage loans owned by investors. It includes mortgage servicing fees and other ancillary servicing income, net of guaranty fees. Servicing fees are generally calculated on the outstanding principal balances of the loans serviced and are recorded as income when earned.
Tax credit investments	ASB invests in limited liability entities formed to operate qualifying affordable housing projects. The affordable housing investments provide tax benefits to investors in the form of tax deductions from operating losses and tax credits. As a limited partner, ASB has no significant influence over the operations. These investments are initially recorded at the initial capital contribution with a liability recognized for the commitment to contribute additional capital over the term of the investment. ASB uses the proportional amortization method of accounting for its investments. Under the proportional amortization method, ASB amortizes the cost of its investments in proportion to the tax credits and other tax benefits it receives. The amortization, tax credits and tax benefits are reported as a component of income tax expense. For these limited liability entities, ASB assesses whether it is the primary beneficiary of the limited liability entity, which is a variable interest entity (VIE). The primary beneficiary of a VIE is determined to be the party that meets both of the following criteria: (i) has the power to make decisions that most significantly affect the economic performance of the VIE; and (ii) has the obligation to absorb losses or the right to receive benefits that in either case could potentially be significant to the VIE. Generally, ASB, as a limited partner, is not deemed to be the primary beneficiary as it does not meet the power criterion, i.e., no power to direct the activities of a VIE that most significantly impact the VIE’s economic performance and no direct ability to unilaterally remove the general partner. All tax credit investments are evaluated for potential impairment at least annually, or more frequently, when events or conditions indicate that it is deemed probable that ASB will not recover its investment. If an investment is determined to be impaired, it is written down to its estimated fair value and the new cost basis of the investment is not adjusted for subsequent recoveries in value. As of December 31, 2019 , ASB did not have any impairment losses resulting from forfeiture or ineligibility of tax credits or other circumstances related to its low-income housing tax credit (LIHTC) investments.

Summary of significant accoun_3

Summary of significant accounting policies (Tables)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Summary of amounts in income tax expense related to investments in qualifying affordable housing projects	The table below summarizes the amounts in income tax expense related to ASB’s LIHTC investments: Years ended December 31 2019 2018 2017 (in millions) Amounts in income taxes related to low-income housing tax credit investments Amortization recognized in the provision for income taxes $ (7.9 ) $ (7.7 ) $ (7.4 ) Tax credits and other tax benefits recognized in the provision for income taxes 11.9 10.9 10.7 Net benefit to income tax expense $ 4.0 $ 3.2 $ 3.3

Segment financial information (

Segment financial information (Tables)	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
Schedule of segment financial information	Segment financial information was as follows: (in thousands) Electric utility Bank Other Total 2019 Revenues from external customers $ 2,545,865 $ 328,570 $ 166 $ 2,874,601 Intersegment revenues (eliminations) 77 — (77 ) — Revenues 2,545,942 328,570 89 2,874,601 Depreciation and amortization 245,362 28,675 4,076 278,113 Interest expense, net 70,842 18,440 20,057 109,339 Income (loss) before income taxes 197,140 112,034 (37,765 ) 271,409 Income taxes (benefit) 38,305 23,061 (9,729 ) 51,637 Net income (loss) 158,835 88,973 (28,036 ) 219,772 Preferred stock dividends of subsidiaries 1,995 — (105 ) 1,890 Net income (loss) for common stock 156,840 88,973 (27,931 ) 217,882 Capital expenditures 419,898 24,175 13,447 457,520 Assets (at December 31, 2019) 6,388,682 7,233,017 123,552 13,745,251 2018 Revenues from external customers $ 2,546,472 $ 314,275 $ 102 $ 2,860,849 Intersegment revenues (eliminations) 53 — (53 ) — Revenues 2,546,525 314,275 49 2,860,849 Depreciation and amortization 230,228 21,443 3,958 255,629 Interest expense, net 73,348 15,539 15,329 104,216 Income (loss) before income taxes 180,426 106,578 (32,543 ) 254,461 Income taxes (benefit) 34,778 24,069 (8,050 ) 50,797 Net income (loss) 145,648 82,509 (24,493 ) 203,664 Preferred stock dividends of subsidiaries 1,995 — (105 ) 1,890 Net income (loss) for common stock 143,653 82,509 (24,388 ) 201,774 Capital expenditures 1 415,264 72,666 18,840 537,369 Assets (at December 31, 2018) 5,967,503 7,027,894 108,654 13,104,051 2017 Revenues from external customers $ 2,257,455 $ 297,640 $ 530 $ 2,555,625 Intersegment revenues (eliminations) 111 — (111 ) — Revenues 2,257,566 297,640 419 2,555,625 Depreciation and amortization 201,282 19,416 1,300 221,998 Interest expense, net 69,637 12,156 9,335 91,128 Income (loss) before income taxes 205,145 98,716 (27,281 ) 276,580 Income taxes (benefit) 83,199 31,719 (5,525 ) 109,393 Net income (loss) 121,946 66,997 (21,756 ) 167,187 Preferred stock dividends of subsidiaries 1,995 — (105 ) 1,890 Net income (loss) for common stock 119,951 66,997 (21,651 ) 165,297 Capital expenditures 1 376,865 53,272 317 495,187 Assets (at December 31, 2017) 5,630,613 6,798,659 104,888 12,534,160 1 Contributions in aid of construction balances are included in capital expenditures.

Electric utility segment (Table

Electric utility segment (Tables)	12 Months Ended
	Dec. 31, 2019
Electric utility subsidiary
Schedule of consolidating statements of income	Statements of Income and Comprehensive Income Data Years ended December 31 2019 2018 2017 (in thousands) Interest and dividend income Interest and fees on loans $ 233,632 $ 220,463 $ 207,255 Interest and dividends on investment securities 32,922 37,762 28,823 Total interest and dividend income 266,554 258,225 236,078 Interest expense Interest on deposit liabilities 16,830 13,991 9,660 Interest on other borrowings 1,610 1,548 2,496 Total interest expense 18,440 15,539 12,156 Net interest income 248,114 242,686 223,922 Provision for loan losses 23,480 14,745 10,901 Net interest income after provision for loan losses 224,634 227,941 213,021 Noninterest income Fees from other financial services 19,275 18,937 22,796 Fee income on deposit liabilities 20,877 21,311 22,204 Fee income on other financial products 6,507 7,052 7,205 Bank-owned life insurance 7,687 5,057 5,539 Mortgage banking income 4,943 1,493 2,201 Gain on sale of real estate 10,762 — — Gains on sale of investment securities, net 653 — — Other income, net 2,074 2,200 1,617 Total noninterest income 72,778 56,050 61,562 Noninterest expense Compensation and employee benefits 103,009 98,387 94,931 Occupancy 21,272 17,073 16,699 Data processing 15,306 14,268 13,280 Services 10,239 10,847 10,994 Equipment 8,760 7,186 7,232 Office supplies, printing and postage 5,512 6,134 6,182 Marketing 4,490 3,567 3,501 FDIC insurance 1,204 2,713 2,904 Other expense 15,586 17,238 20,144 Total noninterest expense 185,378 177,413 175,867 Income before income taxes 112,034 106,578 98,716 Income taxes 23,061 24,069 31,719 Net income 88,973 82,509 66,997 Other comprehensive income (loss), net of taxes 29,406 (7,119 ) (3,139 ) Comprehensive income $ 118,379 $ 75,390 $ 63,858 Reconciliation to amounts per HEI Consolidated Statements of Income*: Years ended December 31 2019 2018 2017 (in thousands) Interest and dividend income $ 266,554 $ 258,225 $ 236,078 Noninterest income 72,778 56,050 61,562 Less: Gain on sale of real estate (10,762 ) — — *Revenues-Bank 328,570 314,275 297,640 Total interest expense 18,440 15,539 12,156 Provision for loan losses 23,480 14,745 10,901 Noninterest expense 185,378 177,413 175,867 Less: Retirement defined benefits credit (expense)—other than service costs 472 (1,657 ) (820 ) Add: Gain on sale of real estate (10,762 ) — — *Expenses-Bank 217,008 206,040 198,104 *Operating income-Bank 111,562 108,235 99,536 Add back: Retirement defined benefits expense (credit)—other than service costs (472 ) 1,657 820 Income before income taxes $ 112,034 $ 106,578 $ 98,716
Schedule of consolidating balance sheets	Balance Sheets Data December 31 2019 2018 (in thousands) Assets Cash and due from banks $ 129,770 $ 122,059 Interest-bearing deposits 48,628 4,225 Investment securities Available-for-sale, at fair value 1,232,826 1,388,533 Held-to-maturity, at amortized cost (fair value of $143,467 and $142,057 at December 31, 2019 and 2018, respectively) 139,451 141,875 Stock in Federal Home Loan Bank, at cost 8,434 9,958 Loans held for investment 5,121,176 4,843,021 Allowance for loan losses (53,355 ) (52,119 ) Net loans 5,067,821 4,790,902 Loans held for sale, at lower of cost or fair value 12,286 1,805 Other 511,611 486,347 Goodwill 82,190 82,190 Total assets $ 7,233,017 $ 7,027,894 Liabilities and shareholder’s equity Deposit liabilities–noninterest-bearing $ 1,909,682 $ 1,800,727 Deposit liabilities–interest-bearing 4,362,220 4,358,125 Other borrowings 115,110 110,040 Other 146,954 124,613 Total liabilities 6,533,966 6,393,505 Commitments and contingencies Common stock 1 1 Additional paid in capital 349,453 347,170 Retained earnings 358,259 325,286 Accumulated other comprehensive loss, net of tax benefits Net unrealized gains (losses) on securities $ 2,481 $ (24,423 ) Retirement benefit plans (11,143 ) (8,662 ) (13,645 ) (38,068 ) Total shareholder’s equity 699,051 634,389 Total liabilities and shareholder’s equity $ 7,233,017 $ 7,027,894 December 31 2019 2018 (in thousands) Other assets Bank-owned life insurance $ 157,465 $ 151,172 Premises and equipment, net 204,449 214,415 Accrued interest receivable 19,365 20,140 Mortgage servicing rights 9,101 8,062 Low-income housing investments 66,302 67,626 Real estate acquired in settlement of loans, net — 406 Other 54,929 24,526 $ 511,611 $ 486,347 Other liabilities Accrued expenses $ 45,822 $ 54,084 Federal and state income taxes payable 14,996 2,012 Cashier’s checks 23,647 26,906 Advance payments by borrowers 10,486 10,183 Other 52,003 31,428 $ 146,954 $ 124,613
Hawaiian Electric Company, Inc. and Subsidiaries
Electric utility subsidiary
Schedule of regulatory assets	Regulatory assets were as follows: December 31 2019 2018 (in thousands) Retirement benefit plans (balance primarily varies with plans’ funded statuses) $ 554,485 $ 624,126 Income taxes (1-55 years) 102,612 114,076 Decoupling revenue balancing account and RAM (1-2 years) — 49,560 Unamortized expense and premiums on retired debt and equity issuances (1-20 years; 1-19 years remaining) 10,228 10,065 Vacation earned, but not yet taken (1 year) 12,535 10,820 Other (1-39 years remaining) 35,220 24,779 Total regulatory assets $ 715,080 $ 833,426 Included in: Current assets $ 30,710 $ 71,016 Long-term assets 684,370 762,410 Total regulatory assets $ 715,080 $ 833,426
Schedule of regulatory liabilities	Regulatory liabilities were as follows: December 31 2019 2018 (in thousands) Cost of removal in excess of salvage value (1-60 years) $ 521,977 $ 491,006 Income taxes (1-55 years) 386,990 413,339 Decoupling revenue balancing account and RAM (1-2 years) 16,370 — Retirement benefit plans (balance primarily varies with plans’ funded statuses) 21,707 19,129 Other (1-19 years remaining) 25,266 26,762 Total regulatory liabilities $ 972,310 $ 950,236 Included in: Current liabilities $ 30,724 $ 17,977 Long-term liabilities 941,586 932,259 Total regulatory liabilities $ 972,310 $ 950,236
Schedule of voluntary liquidation and redemption prices of cumulative preferred stock	The following series of cumulative preferred stock are redeemable only at the option of the respective company at the following prices in the event of voluntary liquidation or redemption: December 31, 2019 Voluntary liquidation price Redemption price Series C, D, E, H, J and K (Hawaiian Electric) $ 20 $ 21 I (Hawaiian Electric) 20 20 G (Hawaii Electric Light) 100 100 H (Maui Electric) 100 100
Schedule of purchases from all IPPs	Purchases from all IPPs were as follows: Years ended December 31 2019 2018 2017 (in millions) Kalaeloa $ 214 $ 216 $ 180 AES Hawaii 139 140 140 HPOWER 76 69 67 Puna Geothermal Venture — 15 38 Hamakua Energy 68 56 35 Wind IPPs 95 107 97 Solar IPPs 36 29 27 Other IPPs 1 5 7 3 Total IPPs $ 633 $ 639 $ 587 1 Includes hydro power and other PPAs
Schedule of changes in asset retirement obligation	Changes to the ARO liability included in “Other liabilities” on Hawaiian Electric’s balance sheet were as follows: (in thousands) 2019 2018 Balance, January 1 $ 8,426 $ 6,035 Accretion expense 312 282 Liabilities incurred 1,594 1,058 Liabilities settled (8 ) (74 ) Revisions in estimated cash flows — 1,125 Balance, December 31 $ 10,324 $ 8,426
Schedule of net annual incremental amounts proposed to be collected (refunded)	The net annual incremental amounts approved to be collected (refunded) from June 1, 2019 through May 31, 2020 are as follows: (in millions) Hawaiian Electric Hawaii Electric Light Maui Electric Total 2019 Annual incremental RAM adjusted revenues,net of changes in Tax Act adjustment* $ 6.5 $ 1.1 $ 5.4 $ 13.0 Annual change in accrued RBA balance as of December 31, 2018 (and associated revenue taxes) which incorporates MPIR recovery (12.2 ) (2.0 ) 0.8 (13.4 ) Performance Incentive Mechanisms (net) (1.3 ) — (0.4 ) (1.7 ) Net annual incremental amount to be collected (refunded) under the tariffs $ (7.0 ) $ (0.9 ) $ 5.8 $ (2.1 ) * The 2017 Tax Cuts and Jobs Act (the Tax Act) had two incremental impacts in 2019. First, the 2019 RAM calculation for all of the Utilities incorporated additional amortization of the regulatory liability associated with certain deferred taxes. Secondly, Maui Electric incorporated a $2.8 million adjustment in its 2018 annual decoupling filing related to the Tax Act which is not recurring in 2019.
Schedule of consolidating statements of income	Consolidating statement of income Year ended December 31, 2019 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Revenues $ 1,803,698 364,590 378,202 — (548 ) [1] $ 2,545,942 Expenses Fuel oil 494,728 84,565 141,416 — — 720,709 Purchased power 494,215 90,989 48,052 — — 633,256 Other operation and maintenance 319,771 76,091 85,875 — — 481,737 Depreciation 143,470 41,812 30,449 — — 215,731 Taxes, other than income taxes 170,979 33,787 35,365 — — 240,131 Total expenses 1,623,163 327,244 341,157 — — 2,291,564 Operating income 180,535 37,346 37,045 — (548 ) 254,378 Allowance for equity funds used during construction 9,955 816 1,216 — — 11,987 Equity in earnings of subsidiaries 43,167 — — — (43,167 ) [2] — Retirement defined benefits expense—other than service costs (2,287 ) (422 ) (127 ) — — (2,836 ) Interest expense and other charges, net (51,199 ) (10,741 ) (9,450 ) — 548 [1] (70,842 ) Allowance for borrowed funds used during construction 3,666 342 445 — — 4,453 Income before income taxes 183,837 27,341 29,129 — (43,167 ) 197,140 Income taxes 25,917 5,990 6,398 — — 38,305 Net income 157,920 21,351 22,731 — (43,167 ) 158,835 Preferred stock dividends of subsidiaries — 534 381 — — 915 Net income attributable to Hawaiian Electric 157,920 20,817 22,350 — (43,167 ) 157,920 Preferred stock dividends of Hawaiian Electric 1,080 — — — — 1,080 Net income for common stock $ 156,840 20,817 22,350 — (43,167 ) $ 156,840 Consolidating statement of income Year ended December 31, 2017 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Revenues $ 1,598,504 333,467 325,678 — (83 ) [1] $ 2,257,566 Expenses Fuel oil 408,204 63,894 115,670 — — 587,768 Purchased power 454,189 87,772 44,673 — — 586,634 Other operation and maintenance 274,391 66,184 71,332 — — 411,907 Depreciation 130,889 38,741 23,154 — — 192,784 Taxes, other than income taxes 152,933 31,184 30,832 — — 214,949 Total expenses 1,420,606 287,775 285,661 — — 1,994,042 Operating income 177,898 45,692 40,017 — (83 ) 263,524 Allowance for equity funds used during construction 10,896 554 1,033 — — 12,483 Equity in earnings of subsidiaries 38,057 — — — (38,057 ) [2] — Retirement defined benefits expense—other than service costs (5,049 ) (93 ) (861 ) — — (6,003 ) Interest expense and other charges, net (48,277 ) (11,799 ) (9,644 ) — 83 [1] (69,637 ) Allowance for borrowed funds used during construction 4,089 238 451 — — 4,778 Income before income taxes 177,614 34,592 30,996 — (38,057 ) 205,145 Income taxes 56,583 13,912 12,704 — — 83,199 Net income 121,031 20,680 18,292 — (38,057 ) 121,946 Preferred stock dividends of subsidiaries — 534 381 — — 915 Net income attributable to Hawaiian Electric 121,031 20,146 17,911 — (38,057 ) 121,031 Preferred stock dividends of Hawaiian Electric 1,080 — — — — 1,080 Net income for common stock $ 119,951 20,146 17,911 — (38,057 ) $ 119,951 Consolidating statement of income Year ended December 31, 2018 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Revenues $ 1,802,550 375,493 368,700 — (218 ) [1] $ 2,546,525 Expenses Fuel oil 523,706 90,792 146,030 — — 760,528 Purchased power 494,450 95,838 49,019 — — 639,307 Other operation and maintenance 313,346 70,396 77,749 — — 461,491 Depreciation 137,410 40,235 25,981 — — 203,626 Taxes, other than income taxes 170,363 34,850 34,699 — — 239,912 Total expenses 1,639,275 332,111 333,478 — — 2,304,864 Operating income 163,275 43,382 35,222 — (218 ) 241,661 Allowance for equity funds used during construction 9,208 478 1,191 — — 10,877 Equity in earnings of subsidiaries 45,393 — — — (45,393 ) [2] — Retirement defined benefits expense—other than service costs (2,649 ) (417 ) (565 ) — — (3,631 ) Interest expense and other charges, net (52,180 ) (11,836 ) (9,550 ) — 218 [1] (73,348 ) Allowance for borrowed funds used during construction 4,019 276 572 — — 4,867 Income before income taxes 167,066 31,883 26,870 — (45,393 ) 180,426 Income taxes 22,333 6,868 5,577 — — 34,778 Net income 144,733 25,015 21,293 — (45,393 ) 145,648 Preferred stock dividends of subsidiaries — 534 381 — — 915 Net income attributable to Hawaiian Electric 144,733 24,481 20,912 — (45,393 ) 144,733 Preferred stock dividends of Hawaiian Electric 1,080 — — — — 1,080 Net income for common stock $ 143,653 24,481 20,912 — (45,393 ) $ 143,653
Schedule of consolidating statements of comprehensive income	Consolidating statement of comprehensive income Year ended December 31, 2019 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Net income for common stock $ 156,840 20,817 22,350 — (43,167 ) $ 156,840 Other comprehensive income (loss), net of taxes: Retirement benefit plans: Net gains (losses) arising during the period, net of taxes 5,249 373 (204 ) — (169 ) [1] 5,249 Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits 9,550 1,455 1,182 — (2,637 ) [1] 9,550 Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes (16,177 ) (1,840 ) (1,152 ) — 2,992 [1] (16,177 ) Other comprehensive loss, net of tax benefits (1,378 ) (12 ) (174 ) — 186 (1,378 ) Comprehensive income attributable to common shareholder $ 155,462 20,805 22,176 — (42,981 ) $ 155,462 Consolidating statement of comprehensive income Year ended December 31, 2017 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Net income for common stock $ 119,951 20,146 17,911 — (38,057 ) $ 119,951 Other comprehensive income (loss), net of taxes: Derivatives qualified as cash flow hedges: Reclassification adjustment to net income, net of tax benefits 454 — — — — 454 Retirement benefit plans: Net gains arising during the period, net of taxes 63,105 3,093 7,329 — (10,422 ) [1] 63,105 Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits 14,477 1,903 1,619 — (3,522 ) [1] 14,477 Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes (78,724 ) (4,994 ) (9,003 ) — 13,997 [1] (78,724 ) Other comprehensive income (loss), net of taxes (688 ) 2 (55 ) — 53 (688 ) Comprehensive income attributable to common shareholder $ 119,263 20,148 17,856 — (38,004 ) $ 119,263 Consolidating statement of comprehensive income Year ended December 31, 2018 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Net income for common stock $ 143,653 24,481 20,912 — (45,393 ) $ 143,653 Other comprehensive income (loss), net of taxes: Retirement benefit plans: Net losses arising during the period, net of tax benefits (26,019 ) (6,090 ) (5,004 ) — 11,094 [1] (26,019 ) Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits 19,012 2,819 2,423 — (5,242 ) [1] 19,012 Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of taxes 8,325 3,305 2,788 — (6,093 ) [1] 8,325 Other comprehensive income, net of taxes 1,318 34 207 — (241 ) 1,318 Comprehensive income attributable to common shareholder $ 144,971 24,515 21,119 — (45,634 ) $ 144,971
Schedule of consolidating balance sheets	Consolidating balance sheet December 31, 2019 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Assets Property, plant and equipment Utility property, plant and equipment Land $ 42,598 5,606 3,612 — — $ 51,816 Plant and equipment 4,765,362 1,313,727 1,161,199 — — 7,240,288 Less accumulated depreciation (1,591,241 ) (574,615 ) (524,301 ) — — (2,690,157 ) Construction in progress 165,137 9,993 17,944 — — 193,074 Utility property, plant and equipment, net 3,381,856 754,711 658,454 — — 4,795,021 Nonutility property, plant and equipment, less accumulated depreciation 5,310 114 1,532 — — 6,956 Total property, plant and equipment, net 3,387,166 754,825 659,986 — — 4,801,977 Investment in wholly-owned subsidiaries, at equity 591,969 — — — (591,969 ) [2] — Current assets Cash and cash equivalents 2,239 6,885 1,797 101 — 11,022 Restricted cash 30,749 123 — — — 30,872 Advances to affiliates 27,700 8,000 — — (35,700 ) [1] — Customer accounts receivable, net 105,454 24,520 22,816 — — 152,790 Accrued unbilled revenues, net 83,148 17,071 17,008 — — 117,227 Other accounts receivable, net 18,396 1,907 1,960 — (10,695 ) [1] 11,568 Fuel oil stock, at average cost 69,003 8,901 14,033 — — 91,937 Materials and supplies, at average cost 34,876 8,313 17,513 — — 60,702 Prepayments and other 88,334 3,725 24,921 — — 116,980 Regulatory assets 27,689 1,641 1,380 — — 30,710 Total current assets 487,588 81,086 101,428 101 (46,395 ) 623,808 Other long-term assets Operating lease right-of-use assets 174,886 1,537 386 — — 176,809 Regulatory assets 476,390 109,163 98,817 — — 684,370 Other 69,010 15,493 17,215 — — 101,718 Total other long-term assets 720,286 126,193 116,418 — — 962,897 Total assets $ 5,187,009 962,104 877,832 101 (638,364 ) $ 6,388,682 Capitalization and liabilities Capitalization Common stock equity $ 2,047,352 298,998 292,870 101 (591,969 ) [2] $ 2,047,352 Cumulative preferred stock–not subject to mandatory redemption 22,293 7,000 5,000 — — 34,293 Long-term debt, net 1,006,737 206,416 188,561 — — 1,401,714 Total capitalization 3,076,382 512,414 486,431 101 (591,969 ) 3,483,359 Current liabilities Current portion of operating lease liabilities 63,582 94 31 — — 63,707 Current portion of long-term debt, net 61,958 13,995 20,000 — — 95,953 Short-term borrowings-non-affiliate 88,987 — — — — 88,987 Short-term borrowings-affiliate 8,000 — 27,700 — (35,700 ) [1] — Accounts payable 139,056 25,629 23,085 — — 187,770 Interest and preferred dividends payable 14,759 3,115 2,900 — (46 ) [1] 20,728 Taxes accrued 143,522 32,541 31,929 — — 207,992 Regulatory liabilities 13,363 9,454 7,907 — — 30,724 Other 51,295 11,362 15,297 — (10,649 ) [1] 67,305 Total current liabilities 584,522 96,190 128,849 — (46,395 ) 763,166 Deferred credits and other liabilities Operating lease liabilities 111,598 1,442 360 — — 113,400 Deferred income taxes 265,864 53,534 57,752 — — 377,150 Regulatory liabilities 664,894 178,474 98,218 — — 941,586 Unamortized tax credits 86,852 16,196 14,820 — — 117,868 Defined benefit pension and other postretirement benefit plans liability 339,471 69,928 69,364 — — 478,763 Other 57,426 33,926 22,038 — — 113,390 Total deferred credits and other liabilities 1,526,105 353,500 262,552 — — 2,142,157 Total capitalization and liabilities $ 5,187,009 962,104 877,832 101 (638,364 ) $ 6,388,682 Consolidating balance sheet December 31, 2018 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Assets Property, plant and equipment Utility property, plant and equipment Land $ 40,449 5,606 3,612 — — $ 49,667 Plant and equipment 4,456,090 1,259,553 1,094,028 — — 6,809,671 Less accumulated depreciation (1,523,861 ) (547,848 ) (505,633 ) — — (2,577,342 ) Construction in progress 193,677 8,781 30,687 — — 233,145 Utility property, plant and equipment, net 3,166,355 726,092 622,694 — — 4,515,141 Nonutility property, plant and equipment, less accumulated depreciation 5,314 115 1,532 — — 6,961 Total property, plant and equipment, net 3,171,669 726,207 624,226 — — 4,522,102 Investment in wholly-owned subsidiaries, at equity 576,838 — — — (576,838 ) [2] — Current assets Cash and cash equivalents 16,732 15,623 3,421 101 — 35,877 Customer accounts receivable, net 125,960 26,483 25,453 — — 177,896 Accrued unbilled revenues, net 88,060 17,051 16,627 — — 121,738 Other accounts receivable, net 21,962 3,131 3,033 — (21,911 ) [1] 6,215 Fuel oil stock, at average cost 54,262 11,027 14,646 — — 79,935 Materials and supplies, at average cost 30,291 7,155 17,758 — — 55,204 Prepayments and other 23,214 5,212 3,692 — — 32,118 Regulatory assets 60,093 3,177 7,746 — — 71,016 Total current assets 420,574 88,859 92,376 101 (21,911 ) 579,999 Other long-term assets Regulatory assets 537,708 120,658 104,044 — — 762,410 Other 69,749 15,944 17,299 — — 102,992 Total other long-term assets 607,457 136,602 121,343 — — 865,402 Total assets $ 4,776,538 951,668 837,945 101 (598,749 ) $ 5,967,503 Capitalization and liabilities Capitalization Common stock equity $ 1,957,641 295,874 280,863 101 (576,838 ) [2] $ 1,957,641 Cumulative preferred stock–not subject to mandatory redemption 22,293 7,000 5,000 — — 34,293 Long-term debt, net 1,000,137 217,749 200,916 — — 1,418,802 Total capitalization 2,980,071 520,623 486,779 101 (576,838 ) 3,410,736 Current liabilities Short-term borrowings-non-affiliate 25,000 — — — — 25,000 Accounts payable 126,384 20,045 25,362 — — 171,791 Interest and preferred dividends payable 16,203 4,203 2,841 — (32 ) [1] 23,215 Taxes accrued 164,747 34,128 34,458 — — 233,333 Regulatory liabilities 7,699 4,872 5,406 — — 17,977 Other 46,391 15,077 20,414 — (21,879 ) [1] 60,003 Total current liabilities 386,424 78,325 88,481 — (21,911 ) 531,319 Deferred credits and other liabilities Deferred income taxes 271,438 54,936 56,823 — — 383,197 Regulatory liabilities 657,210 176,101 98,948 — — 932,259 Unamortized tax credits 60,271 16,217 15,034 — — 91,522 Defined benefit pension and other postretirement benefit plans liability 359,174 73,147 71,338 — — 503,659 Other 61,950 32,319 20,542 — — 114,811 Total deferred credits and other liabilities 1,410,043 352,720 262,685 — — 2,025,448 Total capitalization and liabilities $ 4,776,538 951,668 837,945 101 (598,749 ) $ 5,967,503
Schedule of consolidating statements of changes in common stock equity	Consolidating statements of changes in common stock equity (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Balance, December 31, 2016 $ 1,799,787 291,291 259,554 101 (550,946 ) $ 1,799,787 Net income for common stock 119,951 20,146 17,911 — (38,057 ) 119,951 Other comprehensive income (loss), net of taxes (688 ) 2 (55 ) — 53 (688 ) Issuance of common stock, net of expenses 14,000 4 4,801 — (4,805 ) 14,000 Common stock dividends (87,767 ) (24,796 ) (11,946 ) — 36,742 (87,767 ) Balance, December 31, 2017 1,845,283 286,647 270,265 101 (557,013 ) 1,845,283 Net income for common stock 143,653 24,481 20,912 — (45,393 ) 143,653 Other comprehensive income, net of taxes 1,318 34 207 — (241 ) 1,318 Issuance of common stock, net of expenses 70,692 1 1,498 — (1,499 ) 70,692 Common stock dividends (103,305 ) (15,289 ) (12,019 ) — 27,308 (103,305 ) Balance, December 31, 2018 1,957,641 295,874 280,863 101 (576,838 ) 1,957,641 Net income for common stock 156,840 20,817 22,350 — (43,167 ) 156,840 Other comprehensive loss, net of tax benefits (1,378 ) (12 ) (174 ) — 186 (1,378 ) Issuance of common stock, net of expenses 35,501 (1 ) 4,899 — (4,898 ) 35,501 Common stock dividends (101,252 ) (17,680 ) (15,068 ) — 32,748 (101,252 ) Balance, December 31, 2019 $ 2,047,352 298,998 292,870 101 (591,969 ) $ 2,047,352
Schedule of consolidating statements of cash flows	Consolidating statement of cash flows Year ended December 31, 2019 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Cash flows from operating activities Net income $ 157,920 21,351 22,731 — (43,167 ) [2] $ 158,835 Adjustments to reconcile net income to net cash provided by operating activities Equity in earnings of subsidiaries (43,204 ) — — — 43,167 [2] (37 ) Common stock dividends received from subsidiaries 32,783 — — — (32,748 ) [2] 35 Depreciation of property, plant and equipment 143,470 41,812 30,449 — — 215,731 Other amortization 23,351 4,810 1,470 — — 29,631 Deferred income taxes (13,547 ) (2,383 ) (354 ) — — (16,284 ) Income tax credits, net 27,277 (13 ) (5 ) — — 27,259 State refundable credit (6,245 ) (559 ) (1,565 ) — — (8,369 ) Allowance for equity funds used during construction (9,955 ) (816 ) (1,216 ) — — (11,987 ) Other 298 (48 ) (50 ) — — 200 Changes in assets and liabilities: Decrease in accounts receivable 25,376 3,326 3,469 — (11,215 ) [1] 20,956 Decrease (increase) in accrued unbilled revenues 4,912 (20 ) (381 ) — — 4,511 Decrease (increase) in fuel oil stock (14,741 ) 2,126 613 — — (12,002 ) Decrease (increase) in materials and supplies (4,585 ) (1,158 ) 245 — — (5,498 ) Decrease in regulatory assets 55,494 9,218 6,550 — — 71,262 Increase (decrease) in regulatory liabilities 102 (1,558 ) 3,409 1,953 Increase (decrease) in accounts payable 4,687 (3,160 ) (3,578 ) — — (2,051 ) Change in prepaid and accrued income taxes, tax credits and revenue taxes (24,900 ) (893 ) (3,097 ) — 367 [1] (28,523 ) Decrease in defined benefit pension and other postretirement benefit plans liability (3,033 ) (762 ) (653 ) — — (4,448 ) Change in other assets and liabilities (15,341 ) (6,152 ) (6,940 ) — 11,215 [1] (17,218 ) Net cash provided by operating activities 340,119 65,121 51,097 — (32,381 ) 423,956 Cash flows from investing activities Capital expenditures (311,538 ) (49,811 ) (58,549 ) — — (419,898 ) Advances to affiliates (27,700 ) (8,000 ) — — 35,700 [1] — Other 5,241 297 1,303 — 4,533 [1],[2] 11,374 Net cash used in investing activities (333,997 ) (57,514 ) (57,246 ) — 40,233 (408,524 ) Cash flows from financing activities Common stock dividends (101,252 ) (17,680 ) (15,068 ) — 32,748 [2] (101,252 ) Preferred stock dividends of Hawaiian Electric and subsidiaries (1,080 ) (534 ) (381 ) — — (1,995 ) Proceeds from issuance of common stock 35,500 — 4,900 — (4,900 ) [2] 35,500 Proceeds from issuance of long-term debt 190,000 72,500 17,500 — — 280,000 Repayment of long-term debt and funds transferred for repayment of long-term dent (183,546 ) (70,000 ) (30,000 ) — — (283,546 ) Net increase in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less 46,987 — 27,700 — (35,700 ) [1] 38,987 Proceeds from issuance of short-term debt 75,000 — — — — 75,000 Repayment of short-term debt (50,000 ) — — — — (50,000 ) Other (1,475 ) (508 ) (126 ) — — (2,109 ) Net cash provided by (used in) financing activities 10,134 (16,222 ) 4,525 — (7,852 ) (9,415 ) Net increase (decrease) in cash, cash equivalents and restricted cash 16,256 (8,615 ) (1,624 ) — — 6,017 Cash, cash equivalents and restricted cash, January 1 16,732 15,623 3,421 101 — 35,877 Cash, cash equivalents and restricted cash, December 31 32,988 7,008 1,797 101 — 41,894 Less: Restricted cash (30,749 ) (123 ) — — — (30,872 ) Cash and cash equivalents, December 31 $ 2,239 6,885 1,797 101 — $ 11,022 Consolidating statement of cash flows Year ended December 31, 2018 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating adjustments Hawaiian Electric Cash flows from operating activities Net income $ 144,733 25,015 21,293 — (45,393 ) [2] $ 145,648 Adjustments to reconcile net income to net cash provided by operating activities Equity in earnings of subsidiaries (45,493 ) — — — 45,393 [2] (100 ) Common stock dividends received from subsidiaries 27,408 — — — (27,308 ) [2] 100 Depreciation of property, plant and equipment 137,410 40,235 25,981 — — 203,626 Other amortization 20,956 5,069 577 — — 26,602 Deferred income taxes (9,806 ) (341 ) 2,165 — — (7,982 ) Income tax credits, net (83 ) (14 ) (2 ) — — (99 ) State refundable credit (4,941 ) (547 ) (751 ) — — (6,239 ) Allowance for equity funds used during construction (9,208 ) (478 ) (1,191 ) — — (10,877 ) Other 3,991 348 429 — — 4,768 Changes in assets and liabilities: Increase in accounts receivable (51,656 ) (4,867 ) (8,614 ) — 14,220 [1] (50,917 ) Increase in accrued unbilled revenues (10,884 ) (1,111 ) (2,689 ) — — (14,684 ) Decrease (increase) in fuel oil stock 10,710 (2,329 ) (1,443 ) — — 6,938 Decrease (increase) in materials and supplies (1,966 ) 886 273 — — (807 ) Decrease (increase) in regulatory assets 12,192 71 (3,011 ) — — 9,252 Increase in regulatory liabilities 26,540 5,380 5,438 — — 37,358 Increase in accounts payable 14,748 6,104 3,506 — — 24,358 Change in prepaid and accrued income taxes, tax credits and revenue taxes 24,438 (2,118 ) 3,047 — (331 ) [1] 25,036 Increase (decrease) in defined benefit pension and other postretirement benefit plans liability 17,178 (760 ) 2,328 — — 18,746 Change in other assets and liabilities (8,056 ) 2,806 2,356 — (14,220 ) [1] (17,114 ) Net cash provided by operating activities 298,211 73,349 49,692 — (27,639 ) 393,613 Cash flows from investing activities Capital expenditures (305,703 ) (51,054 ) (58,507 ) — — (415,264 ) Advances from affiliates — — 12,000 — (12,000 ) [1] — Other 3,226 1,182 3,843 — 1,831 [1],[2] 10,082 Net cash used in investing activities (302,477 ) (49,872 ) (42,664 ) — (10,169 ) (405,182 ) Cash flows from financing activities Common stock dividends (103,305 ) (15,289 ) (12,019 ) — 27,308 [2] (103,305 ) Preferred stock dividends of Hawaiian Electric and subsidiaries (1,080 ) (534 ) (381 ) — — (1,995 ) Proceeds from the issuance of common stock 70,700 — 1,500 — (1,500 ) [2] 70,700 Proceeds from the issuance of long-term debt 75,000 15,000 10,000 — — 100,000 Repayment of long-term debt (30,000 ) (11,000 ) (9,000 ) — — (50,000 ) Net decrease in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less (16,999 ) — — — 12,000 [1] (4,999 ) Proceeds from issuance of short-term debt 25,000 — — — — 25,000 Other (377 ) (56 ) (39 ) — — (472 ) Net cash provided by (used in) financing activities 18,939 (11,879 ) (9,939 ) — 37,808 34,929 Net increase (decrease) in cash and cash equivalents 14,673 11,598 (2,911 ) — — 23,360 Cash and cash equivalents, January 1 2,059 4,025 6,332 101 — 12,517 Cash and cash equivalents, December 31 $ 16,732 15,623 3,421 101 — $ 35,877 Consolidating statement of cash flows Year ended December 31, 2017 (in thousands) Hawaiian Electric Hawaii Electric Light Maui Electric Other subsidiaries Consolidating Hawaiian Electric Cash flows from operating activities Net income $ 121,031 20,680 18,292 — (38,057 ) [2] $ 121,946 Adjustments to reconcile net income to net cash provided by operating activities Equity in earnings of subsidiaries (38,157 ) — — — 38,057 [2] (100 ) Common stock dividends received from subsidiaries 36,867 — — — (36,742 ) [2] 125 Depreciation of property, plant and equipment 130,889 38,741 23,154 — — 192,784 Other amortization 2,398 3,225 2,875 — — 8,498 Deferred income taxes 26,342 3,954 8,004 — (263 ) [1] 38,037 Income tax credits, net (35 ) (16 ) (1 ) — — (52 ) State refundable credit (1,382 ) (528 ) (341 ) — — (2,251 ) Allowance for equity funds used during construction (10,896 ) (554 ) (1,033 ) — — (12,483 ) Other 263 974 — — — 1,237 Changes in assets and liabilities: Decrease (increase) in accounts receivable 1,817 (359 ) 45 — 1,411 [1] 2,914 Increase in accrued unbilled revenues (11,355 ) (2,376 ) (1,630 ) — — (15,361 ) Increase in fuel oil stock (17,733 ) (469 ) (2,241 ) — — (20,443 ) Decrease (increase) in materials and supplies 1,603 (661 ) (1,660 ) — — (718 ) Increase in regulatory assets (8,395 ) (4,007 ) (4,854 ) — — (17,256 ) Increase in regulatory liabilities 2,552 315 735 — — 3,602 Increase (decrease) in accounts payable 23,519 (3,547 ) 5,762 — — 25,734 Change in prepaid and accrued income taxes, tax credits and revenue taxes 16,716 7,961 5,362 — (177 ) [1] 29,862 Increase (decrease) in defined benefit pension and other postretirement benefit plans liability 709 52 (157 ) — — 604 Change in other assets and liabilities (18,765 ) (748 ) (569 ) — (1,411 ) [1] (21,493 ) Net cash provided by operating activities 257,988 62,637 51,743 — (37,182 ) 335,186 Cash flows from investing activities Capital expenditures (281,752 ) (47,784 ) (47,329 ) — — (376,865 ) Advances from (to) affiliates — 3,500 (2,000 ) — (1,500 ) [1] — Other (1,711 ) 649 400 — 5,240 [1],[2] 4,578 Net cash used in investing activities (283,463 ) (43,635 ) (48,929 ) — 3,740 (372,287 ) Cash flows from financing activities Common stock dividends (87,767 ) (24,796 ) (11,946 ) — 36,742 [2] (87,767 ) Preferred stock dividends of Hawaiian Electric and subsidiaries (1,080 ) (534 ) (381 ) — — (1,995 ) Proceeds from the issuance of common stock 14,000 — 4,800 — (4,800 ) [2] 14,000 Proceeds from the issuance of long-term debt 202,000 28,000 85,000 — — 315,000 Repayment of long-term debt (162,000 ) (28,000 ) (75,000 ) — — (265,000 ) Net increase in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less 3,499 — — — 1,500 [1] 4,999 Other (2,506 ) (396 ) (1,003 ) — — (3,905 ) Net cash provided by (used in) financing activities (33,854 ) (25,726 ) 1,470 — 33,442 (24,668 ) Net increase (decrease) in cash and cash equivalents (59,329 ) (6,724 ) 4,284 — — (61,769 ) Cash and cash equivalents, January 1 61,388 10,749 2,048 101 — 74,286 Cash and cash equivalents, December 31 $ 2,059 4,025 6,332 101 — $ 12,517 Explanation of consolidating adjustments on consolidating schedules: [1] Eliminations of intercompany receivables and payables and other intercompany transactions. [2] Elimination of investment in subsidiaries, carried at equity.

Bank segment (HEI only) (Tables

Bank segment (HEI only) (Tables)	12 Months Ended
	Dec. 31, 2019
Bank Segment Disclosure [Abstract]
Schedule of statements of income data	Statements of Income and Comprehensive Income Data Years ended December 31 2019 2018 2017 (in thousands) Interest and dividend income Interest and fees on loans $ 233,632 $ 220,463 $ 207,255 Interest and dividends on investment securities 32,922 37,762 28,823 Total interest and dividend income 266,554 258,225 236,078 Interest expense Interest on deposit liabilities 16,830 13,991 9,660 Interest on other borrowings 1,610 1,548 2,496 Total interest expense 18,440 15,539 12,156 Net interest income 248,114 242,686 223,922 Provision for loan losses 23,480 14,745 10,901 Net interest income after provision for loan losses 224,634 227,941 213,021 Noninterest income Fees from other financial services 19,275 18,937 22,796 Fee income on deposit liabilities 20,877 21,311 22,204 Fee income on other financial products 6,507 7,052 7,205 Bank-owned life insurance 7,687 5,057 5,539 Mortgage banking income 4,943 1,493 2,201 Gain on sale of real estate 10,762 — — Gains on sale of investment securities, net 653 — — Other income, net 2,074 2,200 1,617 Total noninterest income 72,778 56,050 61,562 Noninterest expense Compensation and employee benefits 103,009 98,387 94,931 Occupancy 21,272 17,073 16,699 Data processing 15,306 14,268 13,280 Services 10,239 10,847 10,994 Equipment 8,760 7,186 7,232 Office supplies, printing and postage 5,512 6,134 6,182 Marketing 4,490 3,567 3,501 FDIC insurance 1,204 2,713 2,904 Other expense 15,586 17,238 20,144 Total noninterest expense 185,378 177,413 175,867 Income before income taxes 112,034 106,578 98,716 Income taxes 23,061 24,069 31,719 Net income 88,973 82,509 66,997 Other comprehensive income (loss), net of taxes 29,406 (7,119 ) (3,139 ) Comprehensive income $ 118,379 $ 75,390 $ 63,858 Reconciliation to amounts per HEI Consolidated Statements of Income*: Years ended December 31 2019 2018 2017 (in thousands) Interest and dividend income $ 266,554 $ 258,225 $ 236,078 Noninterest income 72,778 56,050 61,562 Less: Gain on sale of real estate (10,762 ) — — *Revenues-Bank 328,570 314,275 297,640 Total interest expense 18,440 15,539 12,156 Provision for loan losses 23,480 14,745 10,901 Noninterest expense 185,378 177,413 175,867 Less: Retirement defined benefits credit (expense)—other than service costs 472 (1,657 ) (820 ) Add: Gain on sale of real estate (10,762 ) — — *Expenses-Bank 217,008 206,040 198,104 *Operating income-Bank 111,562 108,235 99,536 Add back: Retirement defined benefits expense (credit)—other than service costs (472 ) 1,657 820 Income before income taxes $ 112,034 $ 106,578 $ 98,716
Schedule of statements of comprehensive income data	Statements of Income and Comprehensive Income Data Years ended December 31 2019 2018 2017 (in thousands) Interest and dividend income Interest and fees on loans $ 233,632 $ 220,463 $ 207,255 Interest and dividends on investment securities 32,922 37,762 28,823 Total interest and dividend income 266,554 258,225 236,078 Interest expense Interest on deposit liabilities 16,830 13,991 9,660 Interest on other borrowings 1,610 1,548 2,496 Total interest expense 18,440 15,539 12,156 Net interest income 248,114 242,686 223,922 Provision for loan losses 23,480 14,745 10,901 Net interest income after provision for loan losses 224,634 227,941 213,021 Noninterest income Fees from other financial services 19,275 18,937 22,796 Fee income on deposit liabilities 20,877 21,311 22,204 Fee income on other financial products 6,507 7,052 7,205 Bank-owned life insurance 7,687 5,057 5,539 Mortgage banking income 4,943 1,493 2,201 Gain on sale of real estate 10,762 — — Gains on sale of investment securities, net 653 — — Other income, net 2,074 2,200 1,617 Total noninterest income 72,778 56,050 61,562 Noninterest expense Compensation and employee benefits 103,009 98,387 94,931 Occupancy 21,272 17,073 16,699 Data processing 15,306 14,268 13,280 Services 10,239 10,847 10,994 Equipment 8,760 7,186 7,232 Office supplies, printing and postage 5,512 6,134 6,182 Marketing 4,490 3,567 3,501 FDIC insurance 1,204 2,713 2,904 Other expense 15,586 17,238 20,144 Total noninterest expense 185,378 177,413 175,867 Income before income taxes 112,034 106,578 98,716 Income taxes 23,061 24,069 31,719 Net income 88,973 82,509 66,997 Other comprehensive income (loss), net of taxes 29,406 (7,119 ) (3,139 ) Comprehensive income $ 118,379 $ 75,390 $ 63,858 Reconciliation to amounts per HEI Consolidated Statements of Income*: Years ended December 31 2019 2018 2017 (in thousands) Interest and dividend income $ 266,554 $ 258,225 $ 236,078 Noninterest income 72,778 56,050 61,562 Less: Gain on sale of real estate (10,762 ) — — *Revenues-Bank 328,570 314,275 297,640 Total interest expense 18,440 15,539 12,156 Provision for loan losses 23,480 14,745 10,901 Noninterest expense 185,378 177,413 175,867 Less: Retirement defined benefits credit (expense)—other than service costs 472 (1,657 ) (820 ) Add: Gain on sale of real estate (10,762 ) — — *Expenses-Bank 217,008 206,040 198,104 *Operating income-Bank 111,562 108,235 99,536 Add back: Retirement defined benefits expense (credit)—other than service costs (472 ) 1,657 820 Income before income taxes $ 112,034 $ 106,578 $ 98,716
Schedule of balance sheets data	Balance Sheets Data December 31 2019 2018 (in thousands) Assets Cash and due from banks $ 129,770 $ 122,059 Interest-bearing deposits 48,628 4,225 Investment securities Available-for-sale, at fair value 1,232,826 1,388,533 Held-to-maturity, at amortized cost (fair value of $143,467 and $142,057 at December 31, 2019 and 2018, respectively) 139,451 141,875 Stock in Federal Home Loan Bank, at cost 8,434 9,958 Loans held for investment 5,121,176 4,843,021 Allowance for loan losses (53,355 ) (52,119 ) Net loans 5,067,821 4,790,902 Loans held for sale, at lower of cost or fair value 12,286 1,805 Other 511,611 486,347 Goodwill 82,190 82,190 Total assets $ 7,233,017 $ 7,027,894 Liabilities and shareholder’s equity Deposit liabilities–noninterest-bearing $ 1,909,682 $ 1,800,727 Deposit liabilities–interest-bearing 4,362,220 4,358,125 Other borrowings 115,110 110,040 Other 146,954 124,613 Total liabilities 6,533,966 6,393,505 Commitments and contingencies Common stock 1 1 Additional paid in capital 349,453 347,170 Retained earnings 358,259 325,286 Accumulated other comprehensive loss, net of tax benefits Net unrealized gains (losses) on securities $ 2,481 $ (24,423 ) Retirement benefit plans (11,143 ) (8,662 ) (13,645 ) (38,068 ) Total shareholder’s equity 699,051 634,389 Total liabilities and shareholder’s equity $ 7,233,017 $ 7,027,894 December 31 2019 2018 (in thousands) Other assets Bank-owned life insurance $ 157,465 $ 151,172 Premises and equipment, net 204,449 214,415 Accrued interest receivable 19,365 20,140 Mortgage servicing rights 9,101 8,062 Low-income housing investments 66,302 67,626 Real estate acquired in settlement of loans, net — 406 Other 54,929 24,526 $ 511,611 $ 486,347 Other liabilities Accrued expenses $ 45,822 $ 54,084 Federal and state income taxes payable 14,996 2,012 Cashier’s checks 23,647 26,906 Advance payments by borrowers 10,486 10,183 Other 52,003 31,428 $ 146,954 $ 124,613
Schedule of the book value and aggregate fair value by major security type	The major components of investment securities were as follows: Gross unrealized losses Gross unrealized gains Gross unrealized Estimated fair value Less than 12 months 12 months or longer (dollars in thousands) Amortized cost Number of issues Fair value Amount Number of issues Fair value Amount December 31, 2019 Available-for-sale U.S. Treasury and federal agency obligations $ 117,255 $ 652 $ (120 ) $ 117,787 2 $ 4,110 $ (11 ) 3 $ 27,637 $ (109 ) Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies 1,024,892 6,000 (4,507 ) 1,026,385 19 152,071 (819 ) 75 318,020 (3,688 ) Corporate bonds 58,694 1,363 — 60,057 — — — — — — Mortgage revenue bonds 28,597 — — 28,597 — — — — — — $ 1,229,438 $ 8,015 $ (4,627 ) $ 1,232,826 21 $ 156,181 $ (830 ) 78 $ 345,657 $ (3,797 ) Held-to-maturity Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies $ 139,451 $ 4,087 $ (71 ) $ 143,467 1 $ 12,986 $ (71 ) — $ — $ — $ 139,451 $ 4,087 $ (71 ) $ 143,467 1 $ 12,986 $ (71 ) — $ — $ — Gross unrealized losses Gross unrealized gains Gross unrealized Estimated fair value Less than 12 months 12 months or longer (dollars in thousands) Amortized cost Number of issues Fair value Amount Number of issues Fair value Amount December 31, 2018 Available-for-sale U.S. Treasury and federal agency obligations $ 156,694 $ 62 $ (2,407 ) $ 154,349 5 $ 25,882 $ (208 ) 19 $ 118,405 $ (2,199 ) Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies 1,192,169 789 (31,542 ) 1,161,416 22 129,011 (1,330 ) 145 947,890 (30,212 ) Corporate bonds 49,398 103 (369 ) 49,132 6 23,175 (369 ) — — — Mortgage revenue bond 23,636 — — 23,636 — — — — — — $ 1,421,897 $ 954 $ (34,318 ) $ 1,388,533 33 $ 178,068 $ (1,907 ) 164 $ 1,066,295 $ (32,411 ) Held-to-maturity Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies $ 141,875 $ 1,446 $ (1,264 ) $ 142,057 3 $ 29,814 $ (400 ) 2 $ 31,505 $ (864 ) $ 141,875 $ 1,446 $ (1,264 ) $ 142,057 3 $ 29,814 $ (400 ) 2 $ 31,505 $ (864 )
Schedule of contractual maturities of available-for-sale securities	The contractual maturities of investment securities were as follows: Amortized Fair December 31, 2019 Cost value (in thousands) Available-for-sale Due in one year or less $ 60,200 $ 60,249 Due after one year through five years 75,694 77,225 Due after five years through ten years 53,225 53,540 Due after ten years 15,427 15,427 204,546 206,441 Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies 1,024,892 1,026,385 Total available-for-sale securities $ 1,229,438 $ 1,232,826 Held-to-maturity Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies $ 139,451 $ 143,467 Total held-to-maturity securities $ 139,451 $ 143,467
Schedule of proceeds, gains and losses from sales of available for sale investment securities	The proceeds, gross gains and losses from sales of available-for-sale securities were as follows: Years ended December 31 2019 2018 2017 (in millions) Proceeds $ 19.8 $ — $ — Gross gains 0.7 — — Gross losses — — —
Schedule of interest income from available for sale investment securities	Interest income from taxable and non-taxable investment securities were as follows: Years ended December 31 2019 2018 2017 (in thousands) Taxable $ 31,847 $ 37,153 $ 28,398 Non-taxable 1,074 609 425 $ 32,921 $ 37,762 $ 28,823
Schedule of loans receivable	The components of loans were summarized as follows: December 31 2019 2018 (in thousands) Real estate: Residential 1-4 family $ 2,178,135 $ 2,143,397 Commercial real estate 824,830 748,398 Home equity line of credit 1,092,125 978,237 Residential land 14,704 13,138 Commercial construction 70,605 92,264 Residential construction 11,670 14,307 Total real estate 4,192,069 3,989,741 Commercial 670,674 587,891 Consumer 257,921 266,002 Total loans 5,120,664 4,843,634 Less: Deferred fees and discounts 512 (613 ) Allowance for loan losses (53,355 ) (52,119 ) Total loans, net $ 5,067,821 $ 4,790,902
Schedule of allowance for loan losses	The allowance for loan losses (balances and changes) and financing receivables were as follows: (in thousands) Residential 1-4 family Commercial Home equity Residential land Commercial construction Residential construction Commercial Consumer Total December 31, 2019 Allowance for loan losses: Beginning balance $ 1,976 $ 14,505 $ 6,371 $ 479 $ 2,790 $ 4 $ 9,225 $ 16,769 $ 52,119 Charge-offs (26 ) — (144 ) (4 ) — — (6,811 ) (21,677 ) (28,662 ) Recoveries 854 — 17 229 — — 2,351 2,967 6,418 Provision (424 ) 548 678 (255 ) (693 ) (1 ) 5,480 18,147 23,480 Ending balance $ 2,380 $ 15,053 $ 6,922 $ 449 $ 2,097 $ 3 $ 10,245 $ 16,206 $ 53,355 Ending balance: individually evaluated for impairment $ 898 $ 2 $ 322 $ — $ — $ — $ 1,015 $ 454 $ 2,691 Ending balance: collectively evaluated for impairment $ 1,482 $ 15,051 $ 6,600 $ 449 $ 2,097 $ 3 $ 9,230 $ 15,752 $ 50,664 Financing Receivables: Ending balance $ 2,178,135 $ 824,830 $ 1,092,125 $ 14,704 $ 70,605 $ 11,670 $ 670,674 $ 257,921 $ 5,120,664 Ending balance: individually evaluated for impairment $ 15,600 $ 1,048 $ 12,073 $ 3,091 $ — $ — $ 8,418 $ 507 $ 40,737 Ending balance: collectively evaluated for impairment $ 2,162,535 $ 823,782 $ 1,080,052 $ 11,613 $ 70,605 $ 11,670 $ 662,256 $ 257,414 $ 5,079,927 December 31, 2018 Allowance for loan losses: Beginning balance $ 2,902 $ 15,796 $ 7,522 $ 896 $ 4,671 $ 12 $ 10,851 $ 10,987 $ 53,637 Charge-offs (128 ) — (353 ) (18 ) — — (2,722 ) (17,296 ) (20,517 ) Recoveries 74 — 257 179 — — 2,136 1,608 4,254 Provision (872 ) (1,291 ) (1,055 ) (578 ) (1,881 ) (8 ) (1,040 ) 21,470 14,745 Ending balance $ 1,976 $ 14,505 $ 6,371 $ 479 $ 2,790 $ 4 $ 9,225 $ 16,769 $ 52,119 Ending balance: individually evaluated for impairment $ 876 $ 7 $ 701 $ 6 $ — $ — $ 628 $ 4 $ 2,222 Ending balance: collectively evaluated for impairment $ 1,100 $ 14,498 $ 5,670 $ 473 $ 2,790 $ 4 $ 8,597 $ 16,765 $ 49,897 Financing Receivables: Ending balance $ 2,143,397 $ 748,398 $ 978,237 $ 13,138 $ 92,264 $ 14,307 $ 587,891 $ 266,002 $ 4,843,634 Ending balance: individually evaluated for impairment $ 16,494 $ 915 $ 14,800 $ 2,059 $ — $ — $ 5,340 $ 89 $ 39,697 Ending balance: collectively evaluated for impairment $ 2,126,903 $ 747,483 $ 963,437 $ 11,079 $ 92,264 $ 14,307 $ 582,551 $ 265,913 $ 4,803,937 December 31, 2017 Allowance for loan losses: Beginning balance $ 2,873 $ 16,004 $ 5,039 $ 1,738 $ 6,449 $ 12 $ 16,618 $ 6,800 $ 55,533 Charge-offs (826 ) — (14 ) (210 ) — — (4,006 ) (11,757 ) (16,813 ) Recoveries 157 — 308 482 — — 1,852 1,217 4,016 Provision 698 (208 ) 2,189 (1,114 ) (1,778 ) — (3,613 ) 14,727 10,901 Ending balance $ 2,902 $ 15,796 $ 7,522 $ 896 $ 4,671 $ 12 $ 10,851 $ 10,987 $ 53,637 Ending balance: individually evaluated for impairment $ 1,248 $ 65 $ 647 $ 47 $ — $ — $ 694 $ 29 $ 2,730 Ending balance: collectively evaluated for impairment $ 1,654 $ 15,731 $ 6,875 $ 849 $ 4,671 $ 12 $ 10,157 $ 10,958 $ 50,907 Financing Receivables: Ending balance $ 2,118,047 $ 733,106 $ 913,052 $ 15,797 $ 108,273 $ 14,910 $ 544,828 $ 223,564 $ 4,671,577 Ending balance: individually evaluated for impairment $ 18,284 $ 1,016 $ 8,188 $ 1,265 $ — $ — $ 4,574 $ 66 $ 33,393 Ending balance: collectively evaluated for impairment $ 2,099,763 $ 732,090 $ 904,864 $ 14,532 $ 108,273 $ 14,910 $ 540,254 $ 223,498 $ 4,638,184
Schedule of credit risk profile by internally assigned grade for loans	The credit risk profile by internally assigned grade for loans was as follows: December 31 2019 2018 (in thousands) Commercial real estate Commercial construction Commercial Total Commercial real estate Commercial construction Commercial Total Grade: Pass $ 756,747 $ 68,316 $ 621,657 $ 1,446,720 $ 658,288 $ 89,974 $ 547,640 $ 1,295,902 Special mention 4,451 — 29,921 34,372 32,871 — 11,598 44,469 Substandard 63,632 2,289 19,096 85,017 57,239 2,290 28,653 88,182 Doubtful — — — — — — — — Loss — — — — — — — — Total $ 824,830 $ 70,605 $ 670,674 $ 1,566,109 $ 748,398 $ 92,264 $ 587,891 $ 1,428,553
Schedule of credit risk profile based on payment activity for loans	The credit risk profile based on payment activity for loans was as follows: (in thousands) 30-59 days past due 60-89 days past due Greater than 90 days Total past due Current Total financing receivables Recorded investment> 90 days and accruing December 31, 2019 Real estate: Residential 1-4 family $ 2,588 $ 290 $ 1,808 $ 4,686 $ 2,173,449 $ 2,178,135 $ — Commercial real estate — — — — 824,830 824,830 — Home equity line of credit 813 — 2,117 2,930 1,089,195 1,092,125 — Residential land — — 25 25 14,679 14,704 — Commercial construction — — — — 70,605 70,605 — Residential construction — — — — 11,670 11,670 — Commercial 1,077 311 172 1,560 669,114 670,674 — Consumer 4,386 3,257 2,907 10,550 247,371 257,921 — Total loans $ 8,864 $ 3,858 $ 7,029 $ 19,751 $ 5,100,913 $ 5,120,664 $ — December 31, 2018 Real estate: Residential 1-4 family $ 3,757 $ 2,773 $ 2,339 $ 8,869 $ 2,134,528 $ 2,143,397 $ — Commercial real estate — — — — 748,398 748,398 — Home equity line of credit 1,139 681 2,720 4,540 973,697 978,237 — Residential land 9 — 319 328 12,810 13,138 — Commercial construction — — — — 92,264 92,264 — Residential construction — — — — 14,307 14,307 — Commercial 315 281 548 1,144 586,747 587,891 — Consumer 5,220 3,166 2,702 11,088 254,914 266,002 — Total loans $ 10,440 $ 6,901 $ 8,628 $ 25,969 $ 4,817,665 $ 4,843,634 $ —
Schedule of credit risk profile based on nonaccrual loans, accruing loans 90 days or more past due	The credit risk profile based on nonaccrual loans, accruing loans 90 days or more past due, and TDR loans was as follows: Nonaccrual loans Accruing loans 90 days or more past due Troubled debt restructured loans not included in nonaccrual loans December 31 2019 2018 2019 2018 2019 2018 (in thousands) Real estate: Residential 1-4 family $ 11,395 $ 12,037 $ — $ — $ 9,869 $ 10,194 Commercial real estate 195 — — — 853 915 Home equity line of credit 6,638 6,348 — — 10,376 11,597 Residential land 448 436 — — 2,644 1,622 Commercial construction — — — — — — Residential construction — — — — — — Commercial 5,947 4,278 — — 2,614 1,527 Consumer 5,113 4,196 — — 57 62 Total $ 29,736 $ 27,295 $ — $ — $ 26,413 $ 25,917
Schedule of the carrying amount and the total unpaid principal balance of impaired loans	The total carrying amount and the total unpaid principal balance of impaired loans were as follows: December 31 2019 2018 (in thousands) Recorded investment Unpaid principal balance Related allowance Recorded investment Unpaid principal balance Related allowance With no related allowance recorded Real estate: Residential 1-4 family $ 6,817 $ 7,207 $ — $ 7,822 $ 8,333 $ — Commercial real estate 195 200 — — — — Home equity line of credit 1,984 2,135 — 2,743 3,004 — Residential land 3,091 3,294 — 2,030 2,228 — Commercial construction — — — — — — Residential construction — — — — — — Commercial 1,948 2,285 — 3,722 4,775 — Consumer 2 2 — 32 32 — 14,037 15,123 — 16,349 18,372 — With an allowance recorded Real estate: Residential 1-4 family 8,783 8,835 898 8,672 8,875 876 Commercial real estate 853 853 2 915 915 7 Home equity line of credit 10,089 10,099 322 12,057 12,086 701 Residential land — — — 29 29 6 Commercial construction — — — — — — Residential construction — — — — — — Commercial 6,470 6,470 1,015 1,618 1,618 628 Consumer 505 505 454 57 57 4 26,700 26,762 2,691 23,348 23,580 2,222 Total Real estate: Residential 1-4 family 15,600 16,042 898 16,494 17,208 876 Commercial real estate 1,048 1,053 2 915 915 7 Home equity line of credit 12,073 12,234 322 14,800 15,090 701 Residential land 3,091 3,294 — 2,059 2,257 6 Commercial construction — — — — — — Residential construction — — — — — — Commercial 8,418 8,755 1,015 5,340 6,393 628 Consumer 507 507 454 89 89 4 $ 40,737 $ 41,885 $ 2,691 $ 39,697 $ 41,952 $ 2,222 ASB’s average recorded investment of, and interest income recognized from, impaired loans were as follows: December 31 2019 2018 2017 (in thousands) Average Interest Average Interest Average Interest With no related allowance recorded Real estate: Residential 1-4 family $ 8,169 $ 907 $ 8,595 $ 445 $ 9,440 $ 316 Commercial real estate 16 — — — 91 11 Home equity line of credit 2,020 84 2,206 75 1,976 101 Residential land 2,662 129 1,532 40 1,094 117 Commercial construction — — — — — — Residential construction — — — — — — Commercial 4,534 276 3,275 28 2,776 54 Consumer 21 4 22 — 1 — 17,422 1,400 15,630 588 15,378 599 With an allowance recorded Real estate: Residential 1-4 family 8,390 359 8,878 363 9,818 493 Commercial real estate 886 37 982 42 1,241 54 Home equity line of credit 11,319 567 10,617 440 5,045 251 Residential land 27 — 37 3 1,308 97 Commercial construction — — — — — — Residential construction — — — — — — Commercial 6,990 132 1,789 122 3,691 723 Consumer 360 24 57 4 57 3 27,972 1,119 22,360 974 21,160 1,621 Total Real estate: Residential 1-4 family 16,559 1,266 17,473 808 19,258 809 Commercial real estate 902 37 982 42 1,332 65 Home equity line of credit 13,339 651 12,823 515 7,021 352 Residential land 2,689 129 1,569 43 2,402 214 Commercial construction — — — — — — Residential construction — — — — — — Commercial 11,524 408 5,064 150 6,467 777 Consumer 381 28 79 4 58 3 $ 45,394 $ 2,519 $ 37,990 $ 1,562 $ 36,538 $ 2,220 * Since loan was classified as impaired.
Schedule of loan modifications	Loan modifications that occurred during 2019 , 2018 , and 2017 were as follows: Years ended December 31, 2019 December 31, 2018 (dollars in thousands) Number of contracts Outstanding (as of period end) 1 Related allowance (as of period end) Number of contracts Outstanding (as of period end) 1 Related allowance (as of period end) Real estate: Residential 1-4 family 11 $ 1,770 $ 190 3 $ 566 $ 26 Commercial real estate — — — — — — Home equity line of credit 3 442 73 53 6,659 578 Residential land 3 1,086 — 2 1,338 — Commercial construction — — — — — — Residential construction — — — — — — Commercial 8 5,523 417 12 2,165 211 Consumer — — — — — — 25 $ 8,821 $ 680 70 $ 10,728 $ 815 Year ended December 31, 2017 (dollars in thousands) Number of contracts Outstanding (as of period end) 1 Related allowance (as of period end) Real estate: Residential 1-4 family 3 $ 469 $ 65 Commercial real estate — — — Home equity line of credit 44 2,791 545 Residential land 1 92 — Commercial construction — — — Residential construction — — — Commercial 8 525 250 Consumer 1 58 29 57 $ 3,935 $ 889 1 The period end balances reflect all paydowns and charge-offs since the modification period. TDRs fully paid off, charged-off, or foreclosed upon by period end are not included.
Schedule of loans modified in TDRS that experienced a payment default of 90 days or more, and for which payment default occurred within one year of the modification	Loans modified in TDRs that experienced a payment default of 90 days or more in 2019 , 2018 , and 2017 and for which the payment default occurred within one year of the modification, were as follows: Years ended December 31 2019 2018 2017 (dollars in thousands) Number of contracts Recorded investment Number of contracts Recorded investment Number of Recorded Troubled debt restructurings that subsequently defaulted Real estate: Residential 1-4 family — $ — — $ — 1 $ 222 Commercial real estate — — — — — — Home equity line of credit — — 1 81 — — Residential land — — — — — — Commercial construction — — — — — — Residential construction — — — — — — Commercial — — 1 246 — — Consumer — — — — — — — $ — 2 $ 327 1 $ 222
Schedule of amortized intangible assets	Changes in the carrying value of MSRs were as follows: (in thousands) Gross 1 Accumulated amortization 1 Valuation allowance Net December 31, 2019 $ 21,543 $ (12,442 ) $ — $ 9,101 December 31, 2018 $ 18,556 $ (10,494 ) $ — $ 8,062 1 Reflects impact of loans paid in full. Changes related to MSRs were as follows: (in thousands) 2019 2018 2017 Mortgage servicing rights Balance, January 1 $ 8,062 $ 8,639 $ 9,373 Amount capitalized 2,987 1,045 1,239 Amortization (1,948 ) (1,622 ) (1,973 ) Sale of mortgage servicing rights — — — Other-than-temporary impairment — — — Carrying amount before valuation allowance, December 31 9,101 8,062 8,639 Valuation allowance for mortgage servicing rights Balance, January 1 — — — Provision (recovery) — — — Other-than-temporary impairment — — — Balance, December 31 — — — Net carrying value of mortgage servicing rights $ 9,101 $ 8,062 $ 8,639
Schedule of key assumptions used in estimating fair value	Key assumptions used in estimating the fair value of ASB’s MSRs used in the impairment analysis were as follows: December 31 2019 2018 (dollars in thousands) Unpaid principal balance $ 1,276,437 $ 1,188,514 Weighted average note rate 3.96 % 3.98 % Weighted average discount rate 9.3 % 10.0 % Weighted average prepayment speed 11.4 % 6.5 % The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a nonrecurring basis: Significant unobservable input value (1) (dollars in thousands) Fair value Valuation technique Significant unobservable input Range Weighted December 31, 2019 Residential land $ 25 Fair value of property or collateral Appraised value less 7% selling cost N/A (2) N/A (2) Total loans $ 25 December 31, 2018 Home equity lines of credit 77 Fair value of property or collateral Appraised value less 7% selling cost N/A (2) N/A (2) Total loans $ 77 Real estate acquired in settlement of loans $ 186 Fair value of property or collateral Appraised value less 7% selling cost N/A (2) N/A (2) (1) Represent percent of outstanding principal balance. (2) N/A - Not applicable. There is one asset in each fair value measurement type.
Schedule of sensitivity analysis of fair value of MSR to hypothetical adverse changes	The sensitivity analysis of fair value of MSRs to hypothetical adverse changes of 25 and 50 basis points in certain key assumptions was as follows: December 31 2019 2018 (in thousands) Prepayment rate: 25 basis points adverse rate change $ (950 ) $ (250 ) 50 basis points adverse rate change (1,947 ) (566 ) Discount rate: 25 basis points adverse rate change (102 ) (139 ) 50 basis points adverse rate change (202 ) (275 )
Schedule of deposit liabilities	The summarized components of deposit liabilities were as follows: December 31 2019 2018 (dollars in thousands) Weighted-average stated rate Amount Weighted-average stated rate Amount Savings 0.09 % $ 2,379,522 0.07 % $ 2,322,552 Checking Interest-bearing 0.09 1,062,122 0.09 1,055,019 Noninterest-bearing — 977,459 — 932,608 Commercial checking — 932,223 — 868,119 Money market 0.69 150,751 0.63 152,713 Time certificates 1.42 769,825 1.61 827,841 0.24 % $ 6,271,902 0.27 % $ 6,158,852
Schedule of maturities of term certificates	The approximate scheduled maturities of time certificates outstanding at December 31, 2019 were as follows: (in thousands) 2020 $ 503,214 2021 112,632 2022 87,132 2023 29,134 2024 35,253 Thereafter 2,460 $ 769,825
Schedule of interest expense on deposit liabilities by type	Interest expense on deposit liabilities by type of deposit was as follows: Years ended December 31 2019 2018 2017 (in thousands) Time certificates $ 12,675 $ 11,044 $ 7,687 Savings 1,904 1,639 1,567 Money market 953 602 168 Interest-bearing checking 1,298 706 238 $ 16,830 $ 13,991 $ 9,660
Schedule of securities sold under agreements to repurchase	The following tables present information about the securities sold under agreements to repurchase, including the related collateral received from or pledged to counterparties: (in millions) Gross amount of recognized liabilities Gross amount offset in the Balance Sheets Net amount of liabilities presented in the Balance Sheets Repurchase agreements December 31, 2019 $ 115 $ — $ 115 December 31, 2018 65 — 65 Gross amount not offset in the Balance Sheets (in millions) Net amount of liabilities presented in the Balance Sheets Financial instruments Cash collateral pledged Commercial account holders December 31, 2019 $ 115 $ 130 $ — December 31, 2018 65 92 — Securities sold under agreements to repurchase were summarized as follows: December 31 2019 2018 Maturity Repurchase liability Weighted-average interest rate Collateralized by mortgage-backed securities and federal agency obligations at fair value plus accrued interest Repurchase liability Weighted-average Collateralized by (dollars in thousands) Overnight $ 115,110 0.98 % $ 129,527 $ 65,040 0.75 % $ 92,290 1 to 29 days — — — — — — 30 to 90 days — — — — — — Over 90 days — — — — — — $ 115,110 0.98 % $ 129,527 $ 65,040 0.75 % $ 92,290
Schedule of securities sold under agreements to repurchase, which provided for repurchase of identical securities	Information concerning securities sold under agreements to repurchase, which provided for the repurchase of identical securities, was as follows: (dollars in millions) 2019 2018 2017 Amount outstanding as of December 31 $ 115 $ 65 $ 141 Average amount outstanding during the year $ 80 $ 99 $ 98 Maximum amount outstanding as of any month-end $ 115 $ 152 $ 141 Weighted-average interest rate as of December 31 0.98 % 0.75 % 0.65 % Weighted-average interest rate during the year 0.96 % 0.71 % 0.26 % Weighted-average remaining days to maturity as of December 31 1 1 1
Schedule of actual and minimum required capital amounts and ratios	The tables below set forth actual and minimum required capital amounts and ratios: Actual Minimum required Required to be well capitalized (dollars in thousands) Capital Ratio Capital Ratio Capital Ratio December 31, 2019 Tier 1 leverage 641,547 9.06 % 283,122 4.00 % 353,903 5.00 % Common equity tier 1 641,547 13.18 % 219,071 4.50 % 316,435 6.50 % Tier 1 capital 641,547 13.18 % 292,094 6.00 % 389,459 8.00 % Total capital 696,643 14.31 % 389,459 8.00 % 486,823 10.00 % December 31, 2018 Tier 1 leverage 606,291 8.70 % 278,811 4.00 % 348,514 5.00 % Common equity tier 1 606,291 12.80 % 213,190 4.50 % 307,941 6.50 % Tier 1 capital 606,291 12.80 % 284,253 6.00 % 379,004 8.00 % Total capital 660,151 13.93 % 379,004 8.00 % 473,755 10.00 %
Schedule of notional amounts and fair value of derivatives	The notional amount and fair value of ASB’s derivative financial instruments were as follows: December 31 2019 2018 (in thousands) Notional amount Fair value Notional amount Fair value Interest rate lock commitments $ 23,171 $ 297 $ 10,180 $ 91 Forward commitments 29,383 (42 ) 10,132 (43 )
Schedule of derivative financial instruments, fair values, and balance sheet location	ASB’s derivative financial instruments, their fair values, and balance sheet location were as follows: Derivative Financial Instruments Not Designated as Hedging Instruments 1 December 31 2019 2018 (in thousands) Asset derivatives Liability derivatives Asset derivatives Liability derivatives Interest rate lock commitments $ 297 $ — $ 91 $ — Forward commitments 3 45 — 43 $ 300 $ 45 $ 91 $ 43 1 Asset derivatives are included in other assets and liability derivatives are included in other liabilities in the balance sheets.
Schedule of derivative financial instruments and amount and location of net gains or losses	The following table presents ASB’s derivative financial instruments and the amount and location of the net gains or losses recognized in ASB’s statements of income: Derivative Financial Instruments Not Designated Location of net gains as Hedging Instruments (losses) recognized in Years ended December 31 (in thousands) the Statements of Income 2019 2018 2017 Interest rate lock commitments Mortgage banking income $ 206 $ (40 ) $ (290 ) Forward commitments Mortgage banking income 1 (19 ) 153 $ 207 $ (59 ) $ (137 )
Schedule of off balance sheet arrangements	The following is a summary of outstanding off-balance sheet arrangements: December 31 2019 2018 (in thousands) Unfunded commitments to extend credit: Home equity line of credit $ 1,290,854 $ 1,242,804 Commercial and commercial real estate 484,806 515,058 Consumer 70,088 70,292 Residential 1-4 family 21,131 17,552 Commercial and financial standby letters of credit 11,912 13,340 Total $ 1,878,791 $ 1,859,046

Long-term debt (Tables)

Long-term debt (Tables)	12 Months Ended
	Dec. 31, 2019
Long-term Debt, Unclassified [Abstract]
Schedule of long-term debt	On May 13, 2019, the Utilities issued, through a private placement pursuant to separate Note Purchase Agreements (the Note Purchase Agreements), the following unsecured notes bearing taxable interest (the Unsecured Notes): Series 2019A Aggregate principal amount $50 million Fixed coupon interest rate 4.21% Maturity date May 15, 2034 Principal amount by company: Hawaiian Electric $30 million Hawaii Electric Light $10 million Maui Electric $10 million The Unsecured Notes include substantially the same financial covenants and customary conditions as Hawaiian Electric’s credit agreement. Hawaiian Electric is also a party as guarantor under the Note Purchase Agreements entered into by Hawaii Electric Light and Maui Electric. The Unsecured Notes may be prepaid in whole or in part at any time at the prepayment price of the principal amount plus a “Make-Whole Amount,” as defined in the Note Purchase Agreements. On May 15, 2019, proceeds from the sale were applied to redeem the Utilities’ 2004 junior subordinated deferrable interest debentures at par value: 2004 Junior subordinated deferrable interest debentures redeemed Aggregate principal amount $51.5 million Fixed coupon interest rate 6.50% Maturity date May 15, 2034 Principal amount by company: Hawaiian Electric $31.5 million Hawaii Electric Light $10 million Maui Electric $10 million On July 18, 2019, the Department of Budget and Finance of the State of Hawaii (DBF) for the benefit of Hawaiian Electric and Hawaii Electric Light, issued, at par: Refunding Series 2019 Special Purpose Revenue Bonds Aggregate principal amount $150 million Fixed coupon interest rate 3.20% Maturity date July 1, 2039 DBF loaned the proceeds to: Hawaiian Electric $90 million Hawaii Electric Light $60 million On July 26, 2019, proceeds from the sale were applied to redeem at par, bonds previously issued by the DBF for the benefit of Hawaiian Electric and Hawaii Electric Light: Series 2009 Special Purpose Revenue Bonds Redeemed Aggregate principal amount $150 million Fixed coupon interest rate 6.50% Maturity date July 1, 2039 Principal amount by company: Hawaiian Electric $90 million Hawaii Electric Light $60 million On October 10, 2019, the DBF for the benefit of Hawaiian Electric, Hawaii Electric Light and Maui Electric, issued, at par: Series 2019 Special Purpose Revenue Bonds Aggregate principal amount $80 million Fixed coupon interest rate 3.50% Maturity date October 1, 2049 DBF loaned the proceeds to: Hawaiian Electric $70 million Hawaii Electric Light $2.5 million Maui Electric $7.5 million December 31 2019 2018 (dollars in thousands) Long-term debt of Utilities, net of unamortized debt issuance costs 1 $ 1,497,667 $ 1,418,802 HEI 2.99% term loan, due 2022 150,000 150,000 HEI 5.67% senior notes, due 2021 50,000 50,000 HEI 3.99% senior notes, due 2023 50,000 50,000 HEI 4.58% senior notes, due 2025 50,000 50,000 HEI 4.72% senior notes, due 2028 100,000 100,000 Hamakua Energy 4.02% notes, due 2030, secured by real and personal property of Hamakua Energy, LLC 59,699 63,438 Mauo LIBOR + 1.375% loan, due 2022 9,349 — Less unamortized debt issuance costs (2,350 ) (2,599 ) $ 1,964,365 $ 1,879,641 1 See components of “Total long-term debt” and unamortized debt issuance costs in Hawaiian Electric and subsidiaries’ Consolidated Statements of Capitalization.

Shareholders' equity (Tables)

Shareholders' equity (Tables)	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Schedule of accumulated other comprehensive income	Changes in the balances of each component of accumulated other comprehensive income/(loss) (AOCI) were as follows: HEI Consolidated Hawaiian Electric Consolidated (in thousands) Net unrealized gains (losses) on securities Unrealized gains (losses) on derivatives Retirement benefit plans AOCI Unrealized gains (losses) on derivatives Retirement benefit plans AOCI Balance, December 31, 2016 $ (7,931 ) $ (454 ) $ (24,744 ) $ (33,129 ) $ (454 ) $ 132 $ (322 ) Current period other comprehensive income (loss) and reclassifications, net of taxes (4,370 ) 454 2,544 (1,372 ) 454 (1,142 ) (688 ) Reclass of AOCI for tax rate reduction impact 1 (2,650 ) — (4,790 ) (7,440 ) — (209 ) (209 ) Balance, December 31, 2017 (14,951 ) — (26,990 ) (41,941 ) — (1,219 ) (1,219 ) Current period other comprehensive income (loss) and reclassifications, net of taxes (9,472 ) (436 ) 1,239 (8,669 ) — 1,318 1,318 Balance, December 31, 2018 (24,423 ) (436 ) (25,751 ) (50,610 ) — 99 99 Current period other comprehensive income (loss) and reclassifications, net of taxes 26,904 (1,177 ) 4,844 30,571 — (1,378 ) (1,378 ) Balance, December 31, 2019 $ 2,481 $ (1,613 ) $ (20,907 ) $ (20,039 ) $ — $ (1,279 ) $ (1,279 ) 1 The Company and the Utilities adopted ASU No. 2018-02 as of the beginning of the fourth quarter of 2017 and elected to reclassify the income tax effects of the Tax Act from AOCI to retained earnings. Other than this reclassification to retained earnings, the Company and the Utilities release the income tax effects in AOCI from AOCI when the specific AOCI items (e.g., on a security-by-security basis for ASB’s gains/losses on investment securities) are included in net income.
Reclassification Out of Accumulated Other Comprehensive Income	Reclassifications out of AOCI were as follows: Amount reclassified from AOCI Affected line item in the Statement of Income/Balance Sheet Years ended December 31 2019 2018 2017 (in thousands) HEI consolidated Net realized gains on securities included in net income $ (478 ) $ — $ — Revenues-bank (gains on sale of investment securities, net) Derivatives qualifying as cash flow hedges: Window forward contracts — — 454 Property, plant and equipment-electric utilities (2017) Retirement benefit plans: Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost 10,107 21,015 15,737 See Note 10 for additional details Impact of D&Os of the PUC included in regulatory assets (16,177 ) 8,325 (78,724 ) See Note 10 for additional details Total reclassifications $ (6,548 ) $ 29,340 $ (62,533 ) Hawaiian Electric consolidated Derivatives qualifying as cash flow hedges Window forward contracts $ — $ — $ 454 Property, plant and equipment (2017) Retirement benefit plans: Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost 9,550 19,012 14,477 See Note 10 for additional details Impact of D&Os of the PUC included in regulatory assets (16,177 ) 8,325 (78,724 ) See Note 10 for additional details Total reclassifications $ (6,627 ) $ 27,337 $ (63,793 )

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Lease cost	Amounts related to the Company’s total lease cost and cash flows arising from lease transaction are as follows: HEI consolidated Hawaiian Electric consolidated Year ended December 31, 2019 Other leases PPAs classified as leases Total Other leases PPAs classified as leases Total (dollars in thousands) Operating lease cost $ 10,265 $ 63,319 $ 73,584 $ 4,955 $ 63,319 $ 68,274 Variable lease cost 13,034 192,138 205,172 10,272 192,138 202,410 Total lease cost $ 23,299 $ 255,457 $ 278,756 $ 15,227 $ 255,457 $ 270,684 Other information Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases $ 10,447 $ 62,594 $ 73,041 $ 5,768 $ 62,594 $ 68,362 Weighted-average remaining lease term—operating leases (in years) 6.5 2.8 3.5 4.5 2.8 2.9 Weighted-average discount rate—operating leases 3.50 % 4.08 % 3.96 % 4.11 % 4.08 % 4.08 %
Schedule of operating lease liabilities	The following table summarizes the maturity of our operating lease liabilities as of December 31, 2019 : HEI consolidated Hawaiian Electric consolidated (in millions) Other leases PPAs classified as leases Total Other leases PPAs classified as leases Total 2020 $ 12 $ 63 $ 75 $ 7 $ 63 $ 70 2021 10 63 73 5 63 68 2022 6 42 48 3 42 45 2023 5 — 5 2 — 2 2024 4 — 4 1 — 1 Thereafter 9 — 9 2 — 2 Total lease payments 46 168 214 20 168 188 Less: Imputed interest (5 ) (9 ) (14 ) (2 ) (9 ) (11 ) Total present value of lease payments 1 $ 41 $ 159 $ 200 $ 18 $ 159 $ 177 1 The fixed capacity payment related to the existing PPA with PGV, which will expire on December 31, 2027, is not included as a lease liability as of December 31, 2019 as the facility has been offline since May 2018 due to lava flow on Hawaii Island. The annual capacity payment is approximately $7 million . The lease liability will be remeasured when PGV is back in service.
Schedule of future minimum rental payments for operating leases under 842	The future minimum lease obligations under operating leases in effect as of December 31, 2018, having a term in excess of one year as determined prior to the adoption of ASC 842 are as follows: HEI consolidated Hawaiian Electric consolidated (in millions) Other leases PPAs classified as leases Total Other leases PPAs classified as leases Total 2019 $ 11 $ 63 $ 74 $ 6 $ 63 $ 69 2020 9 63 72 6 63 69 2021 8 63 71 5 63 68 2022 5 42 47 2 42 44 2023 4 — 4 2 — 2 Thereafter 12 — 12 3 — 3 Total lease payments $ 49 $ 231 $ 280 $ 24 $ 231 $ 255 HEI’s consolidated operating lease expense prior to the adoption of ASC 842 was $21 million and $20 million in 2018 and 2017, respectively. The Utilities’ operating lease expense prior to the adoption of ASC 842 was $11 million

Revenues (Tables)

Revenues (Tables)	12 Months Ended
	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Disaggregation of revenue	The following tables disaggregate revenues by major source, timing of revenue recognition, and segment: Year ended December 31, 2019 Year ended December 31, 2018 (in thousands) Electric utility Bank Other Total Electric utility Bank Other Total Revenues from contracts with customers Electric energy sales - residential $ 807,652 $ — $ — $ 807,652 $ 801,846 $ — $ — $ 801,846 Electric energy sales - commercial 846,110 — — 846,110 853,672 — — 853,672 Electric energy sales - large light and power 905,308 — — 905,308 894,770 — — 894,770 Electric energy sales - other 16,296 — — 16,296 17,243 — — 17,243 Bank fees — 46,659 — 46,659 — 47,300 — 47,300 Total revenues from contracts with customers 2,575,366 46,659 — 2,622,025 2,567,531 47,300 — 2,614,831 Revenues from other sources Regulatory revenue (54,101 ) — — (54,101 ) (37,687 ) — — (37,687 ) Bank interest and dividend income — 266,554 — 266,554 — 258,225 — 258,225 Other bank noninterest income — 15,357 — 15,357 — 8,750 — 8,750 Other 24,677 — 89 24,766 16,681 — 49 16,730 Total revenues from other sources (29,424 ) 281,911 89 252,576 (21,006 ) 266,975 49 246,018 Total revenues $ 2,545,942 $ 328,570 $ 89 $ 2,874,601 $ 2,546,525 $ 314,275 $ 49 $ 2,860,849 Timing of revenue recognition Services/goods transferred at a point in time $ — $ 46,659 $ — $ 46,659 $ — $ 47,300 $ — $ 47,300 Services/goods transferred over time 2,575,366 — — 2,575,366 2,567,531 — — 2,567,531 Total revenues from contracts with customers $ 2,575,366 $ 46,659 $ — $ 2,622,025 $ 2,567,531 $ 47,300 $ — $ 2,614,831

Retirement benefits (Tables)

Retirement benefits (Tables)	12 Months Ended
	Dec. 31, 2019
Retirement Benefits [Abstract]
Schedule of changes in the obligations and assets of the Company's retirement benefit plans and the changes in AOCI (gross) and the funded status	The changes in the obligations and assets of the Company’s and Utilities’ retirement benefit plans and the changes in AOCI (gross) for 2019 and 2018 and the funded status of these plans and amounts related to these plans reflected in the Company’s and Utilities’ consolidated balance sheet as of December 31, 2019 and 2018 were as follows: 2019 2018 (in thousands) Pension benefits Other benefits Pension benefits Other benefits HEI consolidated Benefit obligation, January 1 $ 1,991,384 $ 188,666 $ 2,094,356 $ 212,601 Service cost 62,135 2,209 68,987 2,721 Interest cost 84,267 8,004 77,374 7,933 Actuarial losses (gains) 224,421 25,998 (171,226 ) (25,977 ) Participants contributions — 2,351 — 2,505 Benefits paid and expenses (83,924 ) (11,589 ) (78,107 ) (11,117 ) Benefit obligation, December 31 2,278,283 215,639 1,991,384 188,666 Fair value of plan assets, January 1 1,479,067 173,693 1,618,703 193,995 Actual return on plan assets 354,072 35,525 (101,406 ) (11,846 ) Employer contributions 48,629 — 38,496 — Participants contributions — 2,351 — 2,505 Benefits paid and expenses (82,568 ) (10,738 ) (76,726 ) (10,961 ) Fair value of plan assets, December 31 1,799,200 200,831 1,479,067 173,693 Accrued benefit asset (liability), December 31 $ (479,083 ) $ (14,808 ) $ (512,317 ) $ (14,973 ) Other assets $ 19,396 $ — $ 10,930 $ — Defined benefit pension and other postretirement benefit plans liability (498,479 ) (14,808 ) (523,247 ) (14,973 ) Accrued benefit asset (liability), December 31 $ (479,083 ) $ (14,808 ) $ (512,317 ) $ (14,973 ) AOCI debit, January 1 (excluding impact of PUC D&Os) $ 536,920 $ 1,962 $ 527,830 $ 1,474 Recognized during year – prior service credit 42 1,806 42 1,805 Recognized during year – net actuarial (losses) gains (15,479 ) 13 (30,084 ) (95 ) Occurring during year – net actuarial losses (gains) (17,662 ) 2,829 39,132 (1,222 ) AOCI debit before cumulative impact of PUC D&Os, December 31 503,821 6,610 536,920 1,962 Cumulative impact of PUC D&Os (474,628 ) (7,458 ) (498,944 ) (4,929 ) AOCI debit/(credit), December 31 $ 29,193 $ (848 ) $ 37,976 $ (2,967 ) Net actuarial loss $ 503,813 $ 11,707 $ 536,954 $ 8,865 Prior service cost (gain) 8 (5,097 ) (34 ) (6,903 ) AOCI debit before cumulative impact of PUC D&Os, December 31 503,821 6,610 536,920 1,962 Cumulative impact of PUC D&Os (474,628 ) (7,458 ) (498,944 ) (4,929 ) AOCI debit/(credit), December 31 29,193 (848 ) 37,976 (2,967 ) Income taxes (benefits) (7,677 ) 219 (10,023 ) 765 AOCI debit/(credit), net of taxes (benefits), December 31 $ 21,516 $ (629 ) $ 27,953 $ (2,202 ) As of December 31, 2019 and 2018, the other postretirement benefit plans shown in the table above had ABOs in excess of plan assets. 2019 2018 (in thousands) Pension benefits Other benefits Pension benefits Other benefits Hawaiian Electric consolidated Benefit obligation, January 1 $ 1,837,653 $ 181,162 $ 1,928,648 $ 204,644 Service cost 60,461 2,191 67,359 2,704 Interest cost 77,851 7,673 71,294 7,628 Actuarial losses (gains) 212,310 25,123 (158,258 ) (25,330 ) Participants contributions — 2,311 — 2,472 Benefits paid and expenses (77,060 ) (11,382 ) (71,535 ) (10,958 ) Transfers (311 ) (5 ) 145 2 Benefit obligation, December 31 2,110,904 207,073 1,837,653 181,162 Fair value of plan assets, January 1 1,343,113 170,862 1,468,403 190,814 Actual return on plan assets 326,204 34,928 (91,836 ) (11,625 ) Employer contributions 47,808 — 37,550 — Participants contributions — 2,311 — 2,472 Benefits paid and expenses (76,581 ) (10,532 ) (71,060 ) (10,801 ) Other (127 ) (5 ) 56 2 Fair value of plan assets, December 31 1,640,417 197,564 1,343,113 170,862 Accrued benefit liability, December 31 $ (470,487 ) $ (9,509 ) $ (494,540 ) $ (10,300 ) Other liabilities (short-term) (518 ) (715 ) (512 ) (669 ) Defined benefit pension and other postretirement benefit plans liability (469,969 ) (8,794 ) (494,028 ) (9,631 ) Accrued benefit liability, December 31 $ (470,487 ) $ (9,509 ) $ (494,540 ) $ (10,300 ) AOCI debit, January 1 (excluding impact of PUC D&Os) $ 502,189 $ 1,551 $ 493,464 $ 839 Recognized during year – prior service credit (cost) (7 ) 1,803 (8 ) 1,803 Recognized during year – net actuarial losses (14,658 ) — (27,302 ) (98 ) Occurring during year – net actuarial losses (gains) (9,446 ) 2,376 36,035 (993 ) AOCI debit before cumulative impact of PUC D&Os, December 31 478,078 5,730 502,189 1,551 Cumulative impact of PUC D&Os (474,628 ) (7,458 ) (498,944 ) (4,929 ) AOCI debit/(credit), December 31 $ 3,450 $ (1,728 ) $ 3,245 $ (3,378 ) Net actuarial loss $ 478,069 $ 10,815 $ 502,173 $ 8,439 Prior service cost (gain) 9 (5,085 ) 16 (6,888 ) AOCI debit before cumulative impact of PUC D&Os, December 31 478,078 5,730 502,189 1,551 Cumulative impact of PUC D&Os (474,628 ) (7,458 ) (498,944 ) (4,929 ) AOCI debit/(credit), December 31 3,450 (1,728 ) 3,245 (3,378 ) Income taxes (benefits) (888 ) 445 (836 ) 870 AOCI debit/(credit), net of taxes (benefits), December 31 $ 2,562 $ (1,283 ) $ 2,409 $ (2,508 )
Schedule of asset allocation of plan assets	The asset allocation of defined benefit retirement plans to equity and fixed income securities (excluding cash) and related investment policy targets and ranges were as follows: Pension benefits 1 Other benefits 2 Investment policy Investment policy December 31 2019 2018 Target Range 2019 2018 Target Range Assets held by category Equity securities 71 % 69 % 70 % 65-75 71 % 70 % 70 % 65-75 Fixed income securities 29 31 30 25-35 29 30 30 25-35 100 % 100 % 100 % 100 % 100 % 100 % 1 Asset allocation (excluding cash) is applicable to only HEI and the Utilities. As of December 31, 2019 and 2018 , nearly all of ASB’s pension assets were invested in fixed income securities. 2 Asset allocation (excluding cash) is applicable to only HEI and the Utilities. ASB does not fund its other benefits. Assets held in various trusts for the retirement benefit plans are measured at fair value on a recurring basis and were as follows: Pension benefits Other benefits Fair value measurements using Fair value measurements using (in millions) December 31 Quoted prices in active markets for identical assets Significant other observable inputs Significant unobservable inputs December 31 Level 1 Level 2 Level 3 2019 Equity securities $ 470 $ 470 $ — $ — $ 61 $ 61 $ — $ — Equity index and exchange-traded funds 610 610 — — 69 69 — — Equity investments at net asset value (NAV) 78 — — — 11 — — — Total equity investments 1,158 1,080 — — 141 130 — — Fixed income securities and public mutual funds 353 123 230 — 52 49 2 — Fixed income investments at NAV 245 — — — 4 — — — Total fixed income investments 598 123 230 — 56 49 2 — Cash equivalents at NAV 39 — — — 4 — — — Total 1,795 $ 1,203 $ 230 $ — 201 $ 179 $ 2 $ — Cash, receivables and payables, net 4 — Fair value of plan assets $ 1,799 $ 201 2018 Equity securities $ 507 $ 507 $ — $ — $ 65 $ 65 $ — $ — Equity index and exchange-traded funds 348 348 — — 42 42 — — Equity investments at NAV 65 — — — 10 — — — Total equity investments 920 855 — — 117 107 — — Fixed income securities and public mutual funds 310 123 187 — 47 45 2 — Fixed income investments at NAV 208 — — — 4 — — — Total fixed income investments 518 123 187 — 51 45 2 — Cash equivalents at NAV 36 — — — 5 — — — Total 1,474 $ 978 $ 187 $ — 173 $ 152 $ 2 $ — Cash, receivables and payables, net 5 1 Fair value of plan assets $ 1,479 $ 174 Pension benefits Other benefits Measured at net asset value December 31 Redemption frequency Redemption notice period December 31 Redemption frequency Redemption notice period (in millions) 2019 Non U.S. equity funds (a) $ 78 Daily-Monthly 5-30 days $ 11 Daily-Monthly 5-30 days Fixed income investments (b) 245 Monthly 15 days 4 Monthly 15 days Cash equivalents (c) 39 Daily 0-1 day 4 Daily 0-1 day $ 362 $ 19 2018 Non U.S. equity funds (a) $ 65 Daily-Monthly 5-30 days $ 10 Daily-Monthly 5-30 days Fixed income investments (b) 208 Monthly 15 days 4 Monthly 15 days Cash equivalents (c) 36 Daily 0-1 day 5 Daily 0-1 day $ 309 $ 19 None of the investments presented in the tables above have unfunded commitments. (a) Represents investments in funds that primarily invest in non-U.S., emerging markets equities. Redemption frequency for pension benefits assets as of December 31, 2019 were: daily, 60% and monthly, 40% , and as of December 31, 2018 were daily, 32% and monthly, 68% . Redemption frequency for other benefits assets as of December 31, 2019 were: daily, 59% and monthly, 41% and as of December 31, 2018 were: daily, 27% and monthly, 73% . (b) Represents investments in fixed income securities invested in a US-dollar denominated fund that seeks to exceed the Barclays Capital Long Corporate A or better Index through investments in US-dollar denominated fixed income securities and commingled vehicles. (c) Represents investments in cash equivalent funds. This class includes funds that invest primarily in securities issued or guaranteed by the U.S. government or its agencies or instrumentalities. For pension benefits, the fund may also invest in fixed income securities of investment grade issuers.
Schedule of weighted-average assumptions used in accounting for plans	The following weighted-average assumptions were used in the accounting for the plans: Pension benefits Other benefits December 31 2019 2018 2017 2019 2018 2017 Benefit obligation Discount rate 3.61 % 4.31 % 3.74 % 3.52 % 4.34 % 3.72 % Rate of compensation increase 3.5 3.5 3.5 NA NA NA Net periodic pension/benefit cost (years ended) Discount rate 4.31 3.74 4.26 4.34 3.72 4.22 Expected return on plan assets 1 7.25 7.50 7.50 7.25 7.50 7.50 Rate of compensation increase 2 3.5 3.5 3.5 NA NA NA NA Not applicable 1 HEI’s and Utilities’ plan assets only. For 2019, 2018 and 2017, ASB’s expected return on plan assets was 4.51% , 3.94% and 4.46% , respectively. 2 The Company and the Utilities use a graded rate of compensation increase assumption based on age. The rate provided above is an average across all future years of service for the current population.
Schedule of components of net periodic benefit cost for consolidated HEI	The components of NPPC and NPBC were as follows: Pension benefits Other benefits (in thousands) 2019 2018 2017 2019 2018 2017 HEI consolidated Service cost $ 62,135 $ 68,987 $ 64,906 $ 2,209 $ 2,721 $ 3,374 Interest cost 84,267 77,374 81,185 8,004 7,933 9,453 Expected return on plan assets (111,989 ) (108,953 ) (102,745 ) (12,356 ) (12,908 ) (12,326 ) Amortization of net prior service gain (42 ) (42 ) (55 ) (1,806 ) (1,805 ) (1,793 ) Amortization of net actuarial losses 15,479 30,084 26,496 (13 ) 95 1,130 Net periodic pension/benefit cost 49,850 67,450 69,787 (3,962 ) (3,964 ) (162 ) Impact of PUC D&Os 48,143 25,828 (18,004 ) 3,258 3,842 1,211 Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) $ 97,993 $ 93,278 $ 51,783 $ (704 ) $ (122 ) $ 1,049 Hawaiian Electric consolidated Service cost $ 60,461 $ 67,359 $ 63,059 $ 2,191 $ 2,704 $ 3,353 Interest cost 77,851 71,294 74,632 7,673 7,628 9,115 Expected return on plan assets (104,632 ) (102,368 ) (95,892 ) (12,180 ) (12,713 ) (12,147 ) Amortization of net prior service (gain) cost 7 8 8 (1,803 ) (1,803 ) (1,804 ) Amortization of net actuarial losses 14,658 27,302 24,392 — 98 1,102 Net periodic pension/benefit cost 48,345 63,595 66,199 (4,119 ) (4,086 ) (381 ) Impact of PUC D&Os 48,143 25,828 (18,004 ) 3,258 3,842 1,211 Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) $ 96,488 $ 89,423 $ 48,195 $ (861 ) $ (244 ) $ 830
Schedule of projected benefit obligations and assets	Additional information on the defined benefit pension plans’ accumulated benefit obligations (ABOs), which do not consider projected pay increases (unlike the PBOs shown in the table above), and pension plans with ABOs and PBOs in excess of plan assets were as follows: HEI consolidated Hawaiian Electric consolidated December 31 2019 2018 2019 2018 (in billions) Defined benefit plans - ABOs $ 2.0 $ 1.7 $ 1.8 $ 1.6 Defined benefit plans with ABO in excess of plan assets ABOs 1.9 1.6 1.8 1.6 Fair value of plan assets 1.7 1.4 1.6 1.3 Defined benefit plans with PBOs in excess of plan assets PBOs 2.2 1.9 2.1 1.8 Fair value of plan assets 1.7 1.4 1.6 1.3

Share-based compensation (Table

Share-based compensation (Tables)	12 Months Ended
	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Schedule of share-based compensation expense and related income tax benefit	Share-based compensation expense and the related income tax benefit were as follows: (in millions) 2019 2018 2017 HEI consolidated Share-based compensation expense 1 $ 10.0 $ 7.8 $ 5.4 Income tax benefit 1.4 1.1 1.9 Hawaiian Electric consolidated Share-based compensation expense 1 3.2 2.7 1.9 Income tax benefit 0.6 0.5 0.7 1 For 2019, 2018 and 2017, the Company has not capitalized any share-based compensation.
Schedule of common stock granted to nonemployee directors	HEI granted HEI common stock to nonemployee directors under the 2011 Director Plan as follows: (dollars in millions) 2019 2018 2017 Shares granted 36,344 38,821 35,770 Fair value $ 1.6 $ 1.3 $ 1.2 Income tax benefit 0.4 0.3 0.5
Schedule of restricted stock units	Information about HEI’s grants of restricted stock units was as follows: 2019 2018 2017 Shares (1) Shares (1) Shares (1) Outstanding, January 1 200,358 $ 33.05 197,047 $ 31.53 220,683 $ 29.57 Granted 96,565 37.82 93,853 34.12 97,873 33.47 Vested (76,813 ) 32.61 (75,683 ) 30.56 (92,147 ) 28.88 Forfeited (12,469 ) 34.20 (14,859 ) 32.35 (29,362 ) 31.57 Outstanding, December 31 207,641 $ 35.36 200,358 $ 33.05 197,047 $ 31.53 Total weighted-average grant-date fair value of shares granted (in millions) $ 3.7 $ 3.2 $ 3.3 (1) Weighted-average grant-date fair value per share based on the average price of HEI common stock on the date of grant.
Schedule of long-term incentive plan (LTIP) linked to total return to shareholders	Information about HEI’s LTIP grants linked to TSR was as follows: 2019 2018 2017 Shares (1) Shares (1) Shares (1) Outstanding, January 1 65,578 $ 38.81 32,904 $ 39.51 83,106 $ 22.95 Granted 35,215 41.07 37,832 38.21 37,204 39.51 Vested (issued or unissued and cancelled) — — — — (83,106 ) 22.95 Forfeited (4,391 ) 39.19 (5,158 ) 38.84 (4,300 ) 39.51 Outstanding, December 31 96,402 $ 39.62 65,578 $ 38.81 32,904 $ 39.51 Total weighted-average grant-date fair value of shares granted (in millions) $ 1.4 $ 1.4 $ 1.5 (1) Weighted-average grant-date fair value per share determined using a Monte Carlo simulation model.
Schedule of assumptions used to determine the fair value of Long-Term Incentive Plan (LTIP) linked to total return to shareholders (TRS)	The following table summarizes the assumptions used to determine the fair value of the LTIP awards linked to TSR and the resulting fair value of LTIP awards granted: 2019 2018 2017 Risk-free interest rate 2.48 % 2.29 % 1.46 % Expected life in years 3 3 3 Expected volatility 15.8 % 17.0 % 20.1 % Range of expected volatility for Peer Group 15.0% to 73.2% 15.1% to 26.2% 15.4% to 26.0% Grant date fair value (per share) $ 41.07 $ 38.20 $ 39.51
Schedule of long-term incentive plan (LTIP) linked to other performance conditions	Information about HEI’s LTIP awards payable in shares linked to other performance conditions was as follows: 2019 2018 2017 Shares (1) Shares (1) Shares (1) Outstanding, January 1 276,169 $ 33.80 131,616 $ 33.47 109,816 $ 25.18 Granted 140,855 37.78 151,328 34.12 148,818 33.47 Vested — — — — (109,816 ) 25.18 Increase above target (cancelled) 4,314 33.53 13,858 33.49 — — Forfeited (17,570 ) 34.66 (20,633 ) 33.80 (17,202 ) 33.48 Outstanding, December 31 403,768 $ 35.15 276,169 $ 33.80 131,616 $ 33.47 Total weighted-average grant-date fair value of shares granted (at target performance levels) (in millions) $ 5.3 $ 5.2 $ 5.0 (1) Weighted-average grant-date fair value per share based on the average price of HEI common stock on the date of grant.

Income taxes (Tables)

Income taxes (Tables)	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Components of income taxes attributable to net income for common stock	The components of income taxes attributable to net income for common stock were as follows: HEI consolidated Hawaiian Electric consolidated Years ended December 31 2019 2018 2017 2019 2018 2017 (in thousands) Federal Current $ 28,736 $ 42,903 $ 61,534 $ 21,751 $ 29,649 $ 36,267 Deferred* (4,353 ) (6,099 ) 33,967 (7,793 ) (5,245 ) 35,229 Deferred tax credits, net** 13,410 (12 ) (20 ) 13,155 (12 ) (20 ) 37,793 36,792 95,481 27,113 24,392 71,476 State Current 10,472 17,361 10,076 5,579 13,210 8,947 Deferred (10,732 ) (3,269 ) 3,868 (8,491 ) (2,737 ) 2,808 Deferred tax credits, net** 14,104 (87 ) (32 ) 14,104 (87 ) (32 ) 13,844 14,005 13,912 11,192 10,386 11,723 Total $ 51,637 $ 50,797 $ 109,393 $ 38,305 $ 34,778 $ 83,199 * The 2018 deferred income tax expense includes the final adjustment to reduce the provisional amount recorded in 2017 pursuant to Staff Accounting Bulletin No. 118 (SAB No. 118). See “Major tax developments” disclosure below for details of the accounting for the enactment of the Tax Act. ** Represents 2019 federal and state tax credits, primarily related to the West Loch PV project, deferred and amortized starting in 2020. See West Loch PV Project discussion in Note 3.
Schedule of reconciliation of amount of income taxes computed at federal statutory rate	A reconciliation of the amount of income taxes computed at the federal statutory rate to the amount provided in the consolidated statements of income was as follows: HEI consolidated Hawaiian Electric consolidated Years ended December 31 2019 2018 2017 2019 2018 2017 (in thousands) Amount at the federal statutory income tax rate $ 56,996 $ 53,437 $ 96,796 $ 41,399 $ 37,889 $ 71,801 Increase (decrease) resulting from: State income taxes, net of federal income tax benefit 11,658 11,832 9,789 8,703 8,080 7,584 Net deferred tax asset (liability) adjustment related to the Tax Act (9,255 ) (9,540 ) 13,420 (9,255 ) (9,285 ) 9,168 Other, net (7,762 ) (4,932 ) (10,612 ) (2,542 ) (1,906 ) (5,354 ) Total $ 51,637 $ 50,797 $ 109,393 $ 38,305 $ 34,778 $ 83,199 Effective income tax rate 19.0 % 20.0 % 39.6 % 19.4 % 19.3 % 40.6 %
Schedule of deferred tax assets and liabilities	The tax effects of book and tax basis differences that give rise to deferred tax assets and liabilities were as follows: HEI consolidated Hawaiian Electric consolidated December 31 2019 2018 2019 2018 (in thousands) Deferred tax assets Regulatory liabilities, excluding amounts attributable to property, plant and equipment $ 100,427 $ 104,868 $ 100,427 $ 104,868 Operating lease liabilities 51,573 — 45,608 — Allowance for bad debts 14,858 14,647 560 659 Other 1 54,028 46,036 41,181 26,522 Total deferred tax assets 220,886 165,551 187,776 132,049 Deferred tax liabilities Property, plant and equipment related 464,312 437,644 458,349 434,831 Operating lease right-of-use assets 51,542 — 45,608 — Regulatory assets, excluding amounts attributable to property, plant and equipment 33,897 37,345 33,897 37,345 Deferred RAM and RBA revenues — 11,278 — 11,278 Retirement benefits 9,684 20,173 13,072 25,430 Other 40,776 31,629 14,001 6,362 Total deferred tax liabilities 600,211 538,069 564,927 515,246 Net deferred income tax liability $ 379,325 $ 372,518 $ 377,151 $ 383,197 1 As of December 31, 2019, HEI consolidated and Hawaiian Electric consolidated have deferred tax assets of $8.7 million and $6.7 million respectively, relating to the benefit of state tax credit carryforwards of $11.7 million and $9 million respectively. These state tax credit carryforwards primarily relate to the West Loch PV project and do not expire. The Company concluded that as of December 31, 2019, a valuation allowance is not required.
Schedule of changes in total unrecognized tax benefits	The following is a reconciliation of the Company’s liability for unrecognized tax benefits for 2019 , 2018 and 2017 . HEI consolidated Hawaiian Electric consolidated (in millions) 2019 2018 2017 2019 2018 2017 Unrecognized tax benefits, January 1 $ 2.1 $ 4.0 $ 3.8 $ 1.6 $ 3.5 3.8 Additions based on tax positions taken during the year 0.5 0.3 0.9 0.5 0.3 0.4 Reductions based on tax positions taken during the year — — (0.2 ) — — (0.2 ) Additions for tax positions of prior years 0.1 0.1 — 0.1 0.1 — Reductions for tax positions of prior years (0.2 ) (0.1 ) (0.5 ) (0.2 ) (0.1 ) (0.5 ) Lapses of statute of limitations (0.3 ) (2.2 ) — (0.3 ) (2.2 ) — Unrecognized tax benefits, December 31 $ 2.2 $ 2.1 $ 4.0 $ 1.7 $ 1.6 $ 3.5

Cash flows (Tables)

Cash flows (Tables)	12 Months Ended
	Dec. 31, 2019
Supplemental Cash Flow Elements [Abstract]
Schedule of supplemental disclosures of cash and noncash activity	Years ended December 31 2019 2018 2017 (in millions) Supplemental disclosures of cash flow information HEI consolidated Interest paid to non-affiliates, net of amounts capitalized $ 107 $ 102 $ 83 Income taxes paid (including refundable credits) 56 72 55 Income taxes refunded (including refundable credits) 4 34 1 Hawaiian Electric consolidated Interest paid to non-affiliates, net of amounts capitalized 68 73 63 Income taxes paid (including refundable credits) 55 64 26 Income taxes refunded (including refundable credits) 4 31 — Supplemental disclosures of noncash activities HEI consolidated Unpaid invoices and accruals for capital expenditures, balance, end of period (investing) 64 59 38 Loans transferred from held for investment to held for sale (investing) — 1 41 Common stock issued (gross) for director and executive/management compensation (financing) 1 5 4 11 Obligations to fund low income housing investments, net (investing) 11 12 13 Transfer of retail repurchase agreements to deposit liabilities (financing) — 102 — Hawaiian Electric consolidated Unpaid invoices and accruals for capital expenditures, balance, end of period (investing) 62 44 38 HEI Consolidated and Hawaiian Electric consolidated Electric utility property, plant and equipment Estimated fair value of noncash contributions in aid of construction (investing) 9 14 18 Acquisition of Hawaiian Telcom’s interest in joint poles (investing) — 48 — 1 The amounts shown represent the market value of common stock issued for director and executive/management compensation and withheld to satisfy statutory tax liabilities.

Fair value measurements (Tables

Fair value measurements (Tables)	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Schedule of estimated fair values of certain of the Company's financial instruments	The following table presents the carrying or notional amount, fair value, and placement in the fair value hierarchy of the Company’s financial instruments. For stock in Federal Home Loan Bank, the carrying amount is a reasonable estimate of fair value because it can only be redeemed at par. Estimated fair value (in thousands) Carrying or notional amount Quoted prices in active markets for identical assets (Level 1) Significant other observable inputs (Level 2) Significant unobservable inputs Total December 31, 2019 Financial assets HEI consolidated Available-for-sale investment securities $ 1,232,826 $ — $ 1,204,229 $ 28,597 $ 1,232,826 Held-to-maturity investment securities 139,451 — 143,467 — 143,467 Stock in Federal Home Loan Bank 8,434 — 8,434 — 8,434 Loans, net 5,080,107 — 12,295 5,145,242 5,157,537 Mortgage servicing rights 9,101 — — 12,379 12,379 Derivative assets 25,179 — 300 — 300 Financial liabilities HEI consolidated Deposit liabilities 769,825 — 765,976 — 765,976 Short-term borrowings—other than bank 185,710 — 185,710 — 185,710 Other bank borrowings 115,110 — 115,107 — 115,107 Long-term debt, net—other than bank 1,964,365 2,156,927 2,156,927 Derivative liabilities 51,375 33 2,185 — 2,218 Hawaiian Electric consolidated Short-term borrowings 88,987 — 88,987 — 88,987 Long-term debt, net 1,497,667 — 1,670,189 — 1,670,189 December 31, 2018 Financial assets HEI consolidated Available-for-sale investment securities $ 1,388,533 $ — $ 1,364,897 $ 23,636 $ 1,388,533 Held-to-maturity investment securities 141,875 — 142,057 — 142,057 Stock in Federal Home Loan Bank 9,958 — 9,958 — 9,958 Loans, net 4,792,707 — 1,809 4,800,244 4,802,053 Mortgage servicing rights 8,062 — — 13,618 13,618 Derivative assets 10,180 — 91 — 91 Financial liabilities HEI consolidated Deposit liabilities 827,841 — 817,667 — 817,667 Short-term borrowings—other than bank 73,992 — 73,992 — 73,992 Other bank borrowings 110,040 — 110,037 — 110,037 Long-term debt, net—other than bank 1,879,641 — 1,904,261 — 1,904,261 Derivative liabilities 34,132 34 596 — 630 Hawaiian Electric consolidated Short-term borrowings 25,000 — 25,000 — 25,000 Long-term debt, net 1,418,802 — 1,443,968 — 1,443,968
Schedule of assets and liabilities measured at fair value on a recurring basis	Assets and liabilities measured at fair value on a recurring basis were as follows: December 31 2019 2018 Fair value measurements using Fair value measurements using (in thousands) Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Available-for-sale investment securities (bank segment) Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies $ — $ 1,026,385 $ — $ — $ 1,161,416 $ — U.S. Treasury and federal agency obligations — 117,787 — — 154,349 — Corporate bonds — 60,057 — — 49,132 — Mortgage revenue bonds — — 28,597 — — 23,636 $ — $ 1,204,229 $ 28,597 $ — $ 1,364,897 $ 23,636 Derivative assets Interest rate lock commitments (bank segment) 1 $ — $ 297 $ — $ — $ 91 $ — Forward commitments (bank segment) 1 — 3 — — — — $ — $ 300 $ — $ — $ 91 $ — Derivative liabilities Interest rate lock commitments (bank segment) 1 $ — $ — $ — $ — $ — $ — Forward commitments (bank segment) 1 33 12 — 34 9 — Interest rate swap (Other segment) 2 — 2,173 — — 587 — $ 33 $ 2,185 $ — $ 34 $ 596 $ — 1 Derivatives are carried at fair value in other assets or other liabilities in the balance sheets with changes in value included in mortgage banking income. 2 Derivatives are included in Other liabilities in the balance sheets.
Schedule of Level 3 assets and liabilities measured at fair value on a recurring basis	The changes in Level 3 assets and liabilities measured at fair value on a recurring basis were as follows: (in thousands) 2019 2018 Mortgage revenue bonds Balance, January 1 $ 23,636 $ 15,427 Principal payments received — — Purchases 4,961 8,209 Unrealized gain (loss) included in other comprehensive income — — Balance, December 31 $ 28,597 $ 23,636
Schedule of assets measured at fair value on a nonrecurring basis	The carrying value of assets measured at fair value on a nonrecurring basis were as follows: Fair value measurements using (in thousands) Balance Level 1 Level 2 Level 3 December 31, 2019 Loans $ 25 $ — $ — $ 25 December 31, 2018 Loans 77 — — 77 Real estate acquired in settlement of loans 186 — — 186
Schedule of significant unobservable inputs used in the fair value measurement	Key assumptions used in estimating the fair value of ASB’s MSRs used in the impairment analysis were as follows: December 31 2019 2018 (dollars in thousands) Unpaid principal balance $ 1,276,437 $ 1,188,514 Weighted average note rate 3.96 % 3.98 % Weighted average discount rate 9.3 % 10.0 % Weighted average prepayment speed 11.4 % 6.5 % The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a nonrecurring basis: Significant unobservable input value (1) (dollars in thousands) Fair value Valuation technique Significant unobservable input Range Weighted December 31, 2019 Residential land $ 25 Fair value of property or collateral Appraised value less 7% selling cost N/A (2) N/A (2) Total loans $ 25 December 31, 2018 Home equity lines of credit 77 Fair value of property or collateral Appraised value less 7% selling cost N/A (2) N/A (2) Total loans $ 77 Real estate acquired in settlement of loans $ 186 Fair value of property or collateral Appraised value less 7% selling cost N/A (2) N/A (2) (1) Represent percent of outstanding principal balance. (2) N/A - Not applicable. There is one asset in each fair value measurement type.

Quarterly information (unaudi_2

Quarterly information (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Schedule of selected quarterly information	Selected quarterly information was as follows: Quarters ended Years ended (in thousands, except per share amounts) March 31 June 30 Sept. 30 Dec. 31 December 31 HEI consolidated 2019 Revenues $ 661,615 $ 715,485 $ 771,535 $ 725,966 $ 2,874,601 Operating income 1 77,937 72,634 97,308 100,795 348,674 Net income 1 46,161 42,985 63,890 66,736 219,772 Net income for common stock 1 45,688 42,512 63,419 66,263 217,882 Basic earnings per common share 1,2 0.42 0.39 0.58 0.61 2.00 Diluted earnings per common share 1,3 0.42 0.39 0.58 0.61 1.99 Dividends per common share 0.32 0.32 0.32 0.32 1.28 2018 Revenues $ 645,874 $ 685,277 $ 768,048 $ 761,650 $ 2,860,849 Operating income 71,889 78,799 98,064 84,604 333,356 Net income 40,720 46,527 66,371 50,046 203,664 Net income for common stock 40,247 46,054 65,900 49,573 201,774 Basic earnings per common share 2 0.37 0.42 0.61 0.46 1.85 Diluted earnings per common share 3 0.37 0.42 0.60 0.45 1.85 Dividends per common share 0.31 0.31 0.31 0.31 1.24 Hawaiian Electric consolidated 2019 Revenues $ 578,495 $ 633,784 $ 688,330 $ 645,333 $ 2,545,942 Operating income 56,560 55,694 71,793 70,331 254,378 Net income 32,625 33,073 47,277 45,860 158,835 Net income for common stock 32,126 32,574 46,779 45,361 156,840 2018 Revenues $ 570,427 $ 608,126 $ 687,409 $ 680,563 2,546,525 Operating income 51,369 55,144 74,036 61,112 241,661 Net income 27,974 31,668 50,210 35,796 145,648 Net income for common stock 27,475 31,169 49,712 35,297 143,653 Note: HEI owns all of Hawaiian Electric’s common stock, therefore per share data for Hawaiian Electric is not meaningful. 1 Operating income for the fourth quarter of 2019 includes gains on property sales totaling $10.8 million , and net income and net income for common stock includes $7.9 million (or $0.07 per share (basic and diluted) at ASB’s 26.8% statutory tax rate). 2 The quarterly basic earnings per common share are based upon the weighted-average number of shares of common stock outstanding in each quarter. 3 The quarterly diluted earnings per common share are based upon the weighted-average number of shares of common stock outstanding in each quarter plus the dilutive incremental shares at quarter end.

Summary of significant accoun_4

Summary of significant accounting policies - General, Cash, and PPE (Details)	Feb. 02, 2018MWhMW	Nov. 24, 2017MW	Dec. 31, 2019USD ($)MW	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Significant Accounting Policies [Line Items]
Restricted cash | $			$ 30,872,000	$ 0	$ 0
Composite annual depreciation rate			3.20%	3.20%	3.20%
Minimum
Significant Accounting Policies [Line Items]
Estimated useful life under production plant (in years)			16 years
Estimated useful life under transmission and distribution plant (in years)			10 years
Estimated useful life under general plant (in years)			5 years
Maximum
Significant Accounting Policies [Line Items]
Estimated useful life under production plant (in years)			88 years
Estimated useful life under transmission and distribution plant (in years)			79 years
Estimated useful life under general plant (in years)			65 years
Hamakua Energy Partners, L.P. (HEP)
Significant Accounting Policies [Line Items]
Power produced by power plants (in megawatts) | MW		60	60
Mauo, LLC
Significant Accounting Policies [Line Items]
Power produced by power plants (in megawatts) | MW	8.6
Power storage capacity (in megawatt hours) | MWh	42.3
American Savings Bank (ASB)
Significant Accounting Policies [Line Items]
Reserve requirement | $			$ 26,200,000	$ 28,100,000

Summary of significant accoun_5

Summary of significant accounting policies - Earnings per share (HEI only) (Details) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Antidilutive securities outstanding (in shares)	0	0	0

Summary of significant accoun_6

Summary of significant accounting policies - Changes In Accounting Standard Updates (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, liability	$ 199,571
Operating lease right-of-use-assets	199,171
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, liability		$ 257,000
Operating lease right-of-use-assets		257,000
Hawaiian Electric Company, Inc. and Subsidiaries
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use-assets	$ 176,809
Hawaiian Electric Company, Inc. and Subsidiaries | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, liability		236,000
Operating lease right-of-use-assets		236,000
Power Purchase Agreement | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, liability		215,000
Operating lease right-of-use-assets		$ 215,000

Summary of significant accoun_7

Summary of significant accounting policies - Accounts Receivable and Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2020	Dec. 31, 2016
Allowance for Credit Losses
Allowance for credit losses	$ 53,355,000	$ 52,119,000	$ 53,637,000		$ 55,533,000
Retained earnings	622,042,000	543,623,000
Accounts Receivable
Allowance for customer accounts receivable, accrued unbilled revenues and other accounts receivable	1,400,000	1,500,000
Goodwill and other intangibles
Goodwill	82,190,000	82,190,000
American Savings Bank (ASB)
Allowance for Credit Losses
Retained earnings	358,259,000	325,286,000
Investment Securities
Other than temporary impairment, investments	$ 0	0	0
Loans modified in a troubled debt restructuring
Number of consecutive months of repayment required for loans to be removed from nonaccrual status	6 months
Goodwill and other intangibles
Goodwill	$ 82,190,000	82,190,000
Goodwill impairment	0	0	$ 0
Low-income housing investments	66,302,000	67,626,000
Commitments to fund affordable housing investments	$ 23,400,000	$ 18,100,000
American Savings Bank (ASB) | Measurement Band A
Goodwill and other intangibles
Risks inherent in servicing assets and servicing liabilities band percent for risk categorization	0.50%
American Savings Bank (ASB) | Measurement Band B
Goodwill and other intangibles
Risks inherent in servicing assets and servicing liabilities band percent for risk categorization	1.00%
American Savings Bank (ASB) | Loans receivable
Nonperforming loans
Period for classification as delinquent	90 days
American Savings Bank (ASB) | Mortgage receivable
Nonperforming loans
Period for classification as delinquent	180 days
American Savings Bank (ASB) | Consumer
Nonperforming loans
Period for write-off	120 days
Hawaiian Electric Company, Inc. and Subsidiaries
Electric utility revenues
Weighted average AFUDC rate	7.40%	7.30%	7.70%
Forecast [Member] | ASU 2016-13 | Minimum
Allowance for Credit Losses
Allowance for credit losses				$ 18,000,000
Retained earnings				18,000,000
Forecast [Member] | ASU 2016-13 | Maximum
Allowance for Credit Losses
Allowance for credit losses				22,000,000
Retained earnings				$ 22,000,000

Summary of significant accoun_8

Summary of significant accounting policies - Summary of Income Tax Expense Related to Investment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Tax Credit Carryforward [Line Items]
Net benefit to income tax expense	$ (51,637)	$ (50,797)	$ (109,393)
American Savings Bank (ASB)
Tax Credit Carryforward [Line Items]
Net benefit to income tax expense	(23,061)	(24,069)	(31,719)
American Savings Bank (ASB) | Variable Interest Entity, Not Primary Beneficiary
Tax Credit Carryforward [Line Items]
Amortization recognized in the provision for income taxes	(7,900)	(7,700)	(7,400)
Tax credits and other tax benefits recognized in the provision for income taxes	11,900	10,900	10,700
Net benefit to income tax expense	$ 4,000	$ 3,200	$ 3,300

Segment financial information_2

Segment financial information (Details) $ in Thousands	Feb. 02, 2018MWhprojectMW	Nov. 24, 2017MW	Dec. 31, 2019USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Sep. 30, 2018USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2019USD ($)MW	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Segment financial information
Revenues			$ 725,966	$ 771,535	$ 715,485	$ 661,615	$ 761,650	$ 768,048	$ 685,277	$ 645,874	$ 2,874,601	$ 2,860,849	$ 2,555,625
Depreciation and amortization											278,113	255,629	221,998
Interest expense, net											109,339	104,216	91,128
Income (loss) before income taxes											271,409	254,461	276,580
Income taxes (benefit)											51,637	50,797	109,393
Net income (loss)			66,736	63,890	42,985	46,161	50,046	66,371	46,527	40,720	219,772	203,664	167,187
Preferred stock dividends of subsidiaries											1,890	1,890	1,890
Net income for common stock			66,263	$ 63,419	$ 42,512	$ 45,688	49,573	$ 65,900	$ 46,054	$ 40,247	217,882	201,774	165,297
Capital expenditures											457,520	537,369	495,187
Assets			13,745,251				13,104,051				13,745,251	13,104,051	12,534,160
Electric utility
Segment financial information
Revenues											2,545,942	2,546,525	2,257,566
Depreciation and amortization											245,362	230,228	201,282
Interest expense, net											70,842	73,348	69,637
Income (loss) before income taxes											197,140	180,426	205,145
Income taxes (benefit)											38,305	34,778	83,199
Net income (loss)											158,835	145,648	121,946
Preferred stock dividends of subsidiaries											1,995	1,995	1,995
Net income for common stock											156,840	143,653	119,951
Capital expenditures											419,898	415,264	376,865
Assets			6,388,682				5,967,503				6,388,682	5,967,503	5,630,613
Bank
Segment financial information
Revenues											328,570	314,275	297,640
Depreciation and amortization											28,675	21,443	19,416
Interest expense, net											18,440	15,539	12,156
Income (loss) before income taxes											112,034	106,578	98,716
Income taxes (benefit)											23,061	24,069	31,719
Net income (loss)											88,973	82,509	66,997
Preferred stock dividends of subsidiaries											0	0	0
Net income for common stock											88,973	82,509	66,997
Capital expenditures											24,175	72,666	53,272
Assets			7,233,017				7,027,894				7,233,017	7,027,894	6,798,659
Other
Segment financial information
Revenues											89	49	419
Depreciation and amortization											4,076	3,958	1,300
Interest expense, net											20,057	15,329	9,335
Income (loss) before income taxes											(37,765)	(32,543)	(27,281)
Income taxes (benefit)											(9,729)	(8,050)	(5,525)
Net income (loss)											(28,036)	(24,493)	(21,756)
Preferred stock dividends of subsidiaries											(105)	(105)	(105)
Net income for common stock											(27,931)	(24,388)	(21,651)
Capital expenditures											13,447	18,840	317
Assets			$ 123,552				$ 108,654				123,552	108,654	104,888
Operating Segments | Electric utility
Segment financial information
Revenues											2,545,865	2,546,472	2,257,455
Operating Segments | Bank
Segment financial information
Revenues											328,570	314,275	297,640
Operating Segments | Other
Segment financial information
Revenues											166	102	530
Intersegment eliminations | Electric utility
Segment financial information
Revenues											77	53	111
Intersegment eliminations | Bank
Segment financial information
Revenues											0	0	0
Intersegment eliminations | Other
Segment financial information
Revenues											$ (77)	$ (53)	$ (111)
Hamakua Energy Partners, L.P. (HEP)
Segment financial information
Power produced by power plants (in megawatts) | MW		60									60
Mauo, LLC
Segment financial information
Power produced by power plants (in megawatts) | MW	8.6
Power storage capacity (in megawatt hours) | MWh	42.3
Power purchase agreement term	15 years
Power purchase agreement extension term	5 years
Number of project sites expected to be placed in service during 2019 and 2020 | project	5

Electric utility segment - Regu

Electric utility segment - Regulatory Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Regulatory assets
Regulatory assets	$ 715,080	$ 833,426
Regulatory liabilities
Regulatory liabilities	$ 972,310	950,236
Minimum | Income taxes
Regulatory liabilities
Authorized amortization or recovery periods	1 year
Minimum | Decoupling revenue balancing account and RAM
Regulatory liabilities
Authorized amortization or recovery periods	1 year
Maximum | Income taxes
Regulatory liabilities
Authorized amortization or recovery periods	55 years
Maximum | Decoupling revenue balancing account and RAM
Regulatory liabilities
Authorized amortization or recovery periods	2 years
Hawaiian Electric Company, Inc. and Subsidiaries
Regulatory assets
Regulatory assets	$ 715,080	833,426
Regulatory liabilities
Regulatory liabilities	972,310	950,236
Hawaiian Electric Company, Inc. and Subsidiaries | Cost of removal in excess of salvage value
Regulatory liabilities
Regulatory liabilities	521,977	491,006
Hawaiian Electric Company, Inc. and Subsidiaries | Income taxes
Regulatory liabilities
Regulatory liabilities	386,990	413,339
Hawaiian Electric Company, Inc. and Subsidiaries | Decoupling revenue balancing account and RAM
Regulatory liabilities
Regulatory liabilities	16,370	0
Hawaiian Electric Company, Inc. and Subsidiaries | Retirement benefit plans
Regulatory liabilities
Regulatory liabilities	21,707	19,129
Hawaiian Electric Company, Inc. and Subsidiaries | Other
Regulatory liabilities
Regulatory liabilities	$ 25,266	26,762
Hawaiian Electric Company, Inc. and Subsidiaries | Minimum | Cost of removal in excess of salvage value
Regulatory liabilities
Authorized amortization or recovery periods	1 year
Hawaiian Electric Company, Inc. and Subsidiaries | Minimum | Other
Regulatory liabilities
Remaining amortization or recovery periods	1 year
Hawaiian Electric Company, Inc. and Subsidiaries | Maximum | Cost of removal in excess of salvage value
Regulatory liabilities
Authorized amortization or recovery periods	60 years
Hawaiian Electric Company, Inc. and Subsidiaries | Maximum | Other
Regulatory liabilities
Remaining amortization or recovery periods	19 years
Hawaiian Electric Company, Inc. and Subsidiaries | Current assets
Regulatory assets
Regulatory assets	$ 30,710	71,016
Hawaiian Electric Company, Inc. and Subsidiaries | Long-term assets
Regulatory assets
Regulatory assets	684,370	762,410
Hawaiian Electric Company, Inc. and Subsidiaries | Current liabilities
Regulatory liabilities
Regulatory liabilities	30,724	17,977
Hawaiian Electric Company, Inc. and Subsidiaries | Long-term liabilities
Regulatory liabilities
Regulatory liabilities	941,586	932,259
Hawaiian Electric Company, Inc. and Subsidiaries | Retirement benefit plans (balance primarily varies with plans’ funded statuses)
Regulatory assets
Regulatory assets	554,485	624,126
Hawaiian Electric Company, Inc. and Subsidiaries | Income taxes
Regulatory assets
Regulatory assets	$ 102,612	114,076
Hawaiian Electric Company, Inc. and Subsidiaries | Income taxes | Minimum
Regulatory assets
Authorized amortization or recovery periods	1 year
Hawaiian Electric Company, Inc. and Subsidiaries | Income taxes | Maximum
Regulatory assets
Authorized amortization or recovery periods	55 years
Hawaiian Electric Company, Inc. and Subsidiaries | Decoupling revenue balancing account and RAM
Regulatory assets
Regulatory assets	$ 0	49,560
Hawaiian Electric Company, Inc. and Subsidiaries | Decoupling revenue balancing account and RAM | Minimum
Regulatory assets
Authorized amortization or recovery periods	1 year
Hawaiian Electric Company, Inc. and Subsidiaries | Decoupling revenue balancing account and RAM | Maximum
Regulatory assets
Authorized amortization or recovery periods	2 years
Hawaiian Electric Company, Inc. and Subsidiaries | Unamortized expense and premiums on retired debt and equity issuances
Regulatory assets
Regulatory assets	$ 10,228	10,065
Hawaiian Electric Company, Inc. and Subsidiaries | Unamortized expense and premiums on retired debt and equity issuances | Minimum
Regulatory assets
Authorized amortization or recovery periods	1 year
Remaining amortization or recovery periods	1 year
Hawaiian Electric Company, Inc. and Subsidiaries | Unamortized expense and premiums on retired debt and equity issuances | Maximum
Regulatory assets
Authorized amortization or recovery periods	20 years
Remaining amortization or recovery periods	19 years
Hawaiian Electric Company, Inc. and Subsidiaries | Vacation earned, but not yet taken
Regulatory assets
Regulatory assets	$ 12,535	10,820
Authorized amortization or recovery periods	1 year
Hawaiian Electric Company, Inc. and Subsidiaries | Other
Regulatory assets
Regulatory assets	$ 35,220	$ 24,779
Hawaiian Electric Company, Inc. and Subsidiaries | Other | Minimum
Regulatory assets
Remaining amortization or recovery periods	1 year
Hawaiian Electric Company, Inc. and Subsidiaries | Other | Maximum
Regulatory assets
Remaining amortization or recovery periods	39 years

Electric utility segment - Majo

Electric utility segment - Major Customers (Details) - Hawaiian Electric Company, Inc. and Subsidiaries - Operating revenues - Customer concentration - Various federal government agencies - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Major customers
Operating revenues percentage	11.00%	11.00%	11.00%
Operating revenues amount	$ 281	$ 273	$ 239

Electric utility segment - Cumu

Electric utility segment - Cumulative Preferred Stock (Details)	Dec. 31, 2019$ / shares
Series C, D, E, H, J and K Preferred Stock | Hawaiian Electric
Class of Stock [Line Items]
Voluntary liquidation price	$ 20
Redemption price	21
Series I Preferred Stock | Hawaiian Electric
Class of Stock [Line Items]
Voluntary liquidation price	20
Redemption price	20
Series G Preferred Stock | Hawaii Electric Light Company, Inc. (HELCO)
Class of Stock [Line Items]
Voluntary liquidation price	100
Redemption price	100
Series H Preferred Stock | Maui Electric Company, Limited (MECO)
Class of Stock [Line Items]
Voluntary liquidation price	100
Redemption price	$ 100

Electric utility segment - Rela

Electric utility segment - Related-Party Transactions (Details) - Parent Company - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Hawaiian Electric Company, Inc. and Subsidiaries
Related Party Transaction [Line Items]
Amount charged to subsidiaries for general management and administrative services	$ 6,000,000	$ 5,900,000	$ 6,200,000
Short-term borrowings due to related party	0
Hawaii Electric Light | Hamakua Energy Partners, L.P. (HEP)
Related Party Transaction [Line Items]
Amount charged to subsidiaries for general management and administrative services	$ 68,000,000	$ 56,000,000

Electric utility segment - HECO

Electric utility segment - HECO Capital Trust III (Details)	May 15, 2019USD ($)	Mar. 31, 2004USD ($)security	Dec. 31, 2019USD ($)
Hawaiian Electric Company, Inc. and Subsidiaries
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Interest income			$ 1,200,000
Hawaiian Electric Company, Inc. and Subsidiaries | 2004 Trust Preferred Securities
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Number of trust preferred securities issued (in shares) | security		2,000,000
Dividend rate on trust preferred securities		6.50%
Aggregate liquidation preference		$ 50,000,000
Securities subject o mandatory redemption, amount redeemed	$ 50,000,000
Dividend distributions on Trust Preferred Securities			1,200,000
Hawaiian Electric Company, Inc. and Subsidiaries | Trust Common Securities
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate liquidation preference		1,500,000
Securities subject o mandatory redemption, amount redeemed	$ 1,500,000
Common dividend			$ 37,000
Hawaiian Electric
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Principal amount of debentures		31,500,000
Hawaii Electric Light
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Principal amount of debentures		$ 10,000,000

Electric utility segment - Unco

Electric utility segment - Unconsolidated Variable Interest Entities (Details)	12 Months Ended
	Dec. 31, 2019agreemententity
Variable Interest Entity [Line Items]
Number of unconsolidated VIEs	3
Hawaiian Electric Company, Inc. and Subsidiaries
Variable Interest Entity [Line Items]
Number of power purchase agreements (PPAs) | agreement	4
Number of entities owning wind farms not required to be consolidated as VIE's	2
Minimum potential number of IPP entities consolidated into company in the future	1

Electric utility segment - Powe

Electric utility segment - Power Purchase Agreements (Details) $ in Thousands	1 Months Ended				12 Months Ended
	May 31, 2018MW	Jun. 30, 2015MW	May 31, 2012MW	Mar. 31, 1988MW	Dec. 31, 2019USD ($)agreementMW	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 1988MW
Hawaiian Electric Company, Inc. and Subsidiaries
Regulatory Projects and Legal Obligations [Line Items]
Purchased power					$ 633,256	$ 639,307	$ 586,634
Number of power purchase agreements (PPAs) | agreement					4
Power purchase capacity excluding agreements with smaller IPPs (in megawatts) | MW					516.5
Expected fixed capacity charges, 2020					$ 51,000
Expected fixed capacity charges, 2021					38,000
Expected fixed capacity charges, 2022					38
Expected fixed capacity charges, 2023					38
Expected fixed capacity charges, 2024					38
Expected fixed capacity charges, 2025-2033					241,000
Hawaiian Electric Company, Inc. and Subsidiaries | AES Hawaii, Inc. (AES Hawaii)
Regulatory Projects and Legal Obligations [Line Items]
Purchase commitment, period				30 years
Purchase commitment, minimum power volume required to be purchased | MW				180
Purchase commitment, arbitration, additional capacity requirement | MW		9
Hawaiian Electric Company, Inc. and Subsidiaries | Hu Honua Bioenergy
Regulatory Projects and Legal Obligations [Line Items]
Purchase commitment, minimum power volume required to be purchased | MW			21.5
Hawaiian Electric Company, Inc. and Subsidiaries | Kalaeloa Partners, L.P. (Kalaeloa)
Regulatory Projects and Legal Obligations [Line Items]
Purchase commitment, minimum power volume required to be purchased | MW								208
Hawaiian Electric Company, Inc. and Subsidiaries | Kalaeloa Partners, L.P. (Kalaeloa)
Regulatory Projects and Legal Obligations [Line Items]
Purchased power					214,000	216,000	180,000
Hawaiian Electric Company, Inc. and Subsidiaries | AES Hawaii, Inc. (AES Hawaii)
Regulatory Projects and Legal Obligations [Line Items]
Purchased power					139,000	140,000	140,000
Hawaiian Electric Company, Inc. and Subsidiaries | HPOWER
Regulatory Projects and Legal Obligations [Line Items]
Purchased power					76,000	69,000	67,000
Hawaiian Electric Company, Inc. and Subsidiaries | Puna Geothermal Venture
Regulatory Projects and Legal Obligations [Line Items]
Purchased power					0	15,000	38,000
Hawaiian Electric Company, Inc. and Subsidiaries | Hamakua Energy Partners, L.P. (HEP)
Regulatory Projects and Legal Obligations [Line Items]
Purchased power					68,000	56,000	35,000
Hawaiian Electric Company, Inc. and Subsidiaries | Wind IPPs
Regulatory Projects and Legal Obligations [Line Items]
Purchased power					95,000	107,000	97,000
Hawaiian Electric Company, Inc. and Subsidiaries | Solar IPPs
Regulatory Projects and Legal Obligations [Line Items]
Purchased power					36,000	29,000	27,000
Hawaiian Electric Company, Inc. and Subsidiaries | Other IPPs
Regulatory Projects and Legal Obligations [Line Items]
Purchased power					$ 5,000	$ 7,000	$ 3,000
PGV Facility
Regulatory Projects and Legal Obligations [Line Items]
Power purchase capacity excluding agreements with smaller IPPs (in megawatts) | MW	34.6

Electric utility segment - Util

Electric utility segment - Utility Projects (Details) - Hawaiian Electric Company, Inc. and Subsidiaries	Jun. 10, 2019USD ($)	Aug. 11, 2016USD ($)	Nov. 30, 2019USD ($)$ / kWhMW	Dec. 31, 2019USD ($)
ERP/EAM Implementation Project
Regulatory Projects and Legal Obligations [Line Items]
ERP/EAM cost recovery cap		$ 77,600,000
ERP/EAM required pass-through savings		$ 246,000,000
ERP/EAM project service period (in years)	12 years	12 years
Weighted average AFUDC rate		1.75%
ERP/EAM implementation project costs, accrued carrying costs once put into service				$ 59,300,000
ERP/EAM implementation project, expected future O&M expense reductions	$ 150,000,000
ERP/EAM implementation project, future cost avoidance related to capital costs and tax costs	$ 96,000,000
ERP/EAM regulatory liability for operation and maitenance expense reductions				2,400,000
West Loch PV Project
Regulatory Projects and Legal Obligations [Line Items]
Solar project, energy production (in megawatts) | MW			20
Solar project, project cap			$ 67,000,000
Solar project, maximum energy costs (in dollars per KWH) | $ / kWh			0.0956
Solar project, cost incurred				51,400,000
Federal nonrefundable tax credits				13,400,000
State nonrefundable tax credits				$ 14,000,000

Electric utility segment - Envi

Electric utility segment - Environmental Regulation (Details) $ in Millions	Dec. 31, 2019USD ($)
Maui Electric Company, Limited (MECO)
Environmental regulation
Additional accrued investigation and estimated cleanup costs	$ 2.7
PCB Contamination | Hawaiian Electric
Environmental regulation
Accrual for environmental loss contingencies	$ 4.2

Electric utility segment - Asse

Electric utility segment - Asset retirement obligations (Details) - Hawaiian Electric Company, Inc. and Subsidiaries - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Regulatory Projects and Legal Obligations [Line Items]
ARO, recognition impact on earnings	$ 0
Changes in the asset retirement obligation liability
Balance at the beginning of the period	8,426,000	$ 6,035,000
Accretion expense	312,000	282,000
Liabilities incurred	1,594,000	1,058,000
Liabilities settled	(8,000)	(74,000)
Revisions in estimated cash flows	0	1,125,000
Balance at the end of the period	$ 10,324,000	$ 8,426,000

Electric utility segment - Ma_2

Electric utility segment - Major Project Interim Recovery and Performance Incentive Mechanisms (Details) - Hawaiian Electric Company, Inc. and Subsidiaries	Feb. 07, 2020USD ($)	Mar. 25, 2019contract	Apr. 27, 2017USD ($)	Dec. 31, 2019USD ($)	May 31, 2019USD ($)	Feb. 28, 2019USD ($)	Dec. 31, 2018USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)$ / kWh
Regulatory Projects and Legal Obligations [Line Items]
Threshold of capital expenditures in excess of customer contributions for qualification for major project interim recovery			$ 2,500,000
Major project interim recovery requested amount			$ 3,600,000			$ 19,800,000
Target performance historical measurement period									10 years
Service reliability, maximum penalty, percent of return on equity									0.20%
Maximum penalty, pending adjusted amount									$ 6,700,000
Dead band percentage above or below target									3.00%
Call center performance, maximum penalty, percent									0.80%
Call center performance, maximum penalty, pending adjusted amount									$ 1,300,000
Call center performance, maximum penalty amount				$ 300,000	$ 1,300,000		$ 2,100,000
Performance incentive mechanism, savings calculation, energy price, renewable projects with storage capacity | $ / kWh										0.115
Performance incentive mechanism, savings calculation, energy price, renewable energy-only projects | $ / kWh										0.095
Performance incentive mechanism, expected savings percentage, phase 1										20.00%
Performance incentive mechanism, savings calculation, incentive cap								$ 3,000,000		$ 3,500,000
Performance incentive mechanism, expected savings in Phase 2, January 2019								15.00%
Performance incentive mechanism, expected savings in Phase 2, February 2019								10.00%
Performance incentive mechanism, expected savings in Phase 2, March 2019								5.00%
Performance incentive mechanism, penalty									$ 0
Number of contracts which qualified for incentives | contract		6
Public utility, incentives accrued								$ 1,700,000
Subsequent Event
Regulatory Projects and Legal Obligations [Line Items]
Major project interim recovery requested amount	$ 24,200,000
Schofield Generation Station | Subsequent Event
Regulatory Projects and Legal Obligations [Line Items]
Major project interim recovery requested amount	19,200,000
West Loch PV Project | Subsequent Event
Regulatory Projects and Legal Obligations [Line Items]
Major project interim recovery requested amount	4,500,000
Grid Modernization Strategy Phase 1 Project | Subsequent Event
Regulatory Projects and Legal Obligations [Line Items]
Major project interim recovery requested amount	$ 500,000

Electric utility segment - Annu

Electric utility segment - Annual Decoupling Filings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Hawaiian Electric Company, Inc. and Subsidiaries
Regulatory Projects and Legal Obligations [Line Items]
2019 Annual incremental RAM adjusted revenues,net of changes in Tax Act adjustment	$ 13
Annual change in accrued RBA balance as of December 31, 2018 (and associated revenue taxes) which incorporates MPIR recovery	13.4
Net annual incremental amount to be collected (refunded) under the tariffs	(1.7)
Net annual incremental amount to be collected (refunded) under the tariffs	(2.1)
Hawaiian Electric
Regulatory Projects and Legal Obligations [Line Items]
2019 Annual incremental RAM adjusted revenues,net of changes in Tax Act adjustment	6.5
Annual change in accrued RBA balance as of December 31, 2018 (and associated revenue taxes) which incorporates MPIR recovery	12.2
Net annual incremental amount to be collected (refunded) under the tariffs	(1.3)
Net annual incremental amount to be collected (refunded) under the tariffs	(7)
Hawaii Electric Light
Regulatory Projects and Legal Obligations [Line Items]
2019 Annual incremental RAM adjusted revenues,net of changes in Tax Act adjustment	1.1
Annual change in accrued RBA balance as of December 31, 2018 (and associated revenue taxes) which incorporates MPIR recovery	2
Net annual incremental amount to be collected (refunded) under the tariffs	0
Net annual incremental amount to be collected (refunded) under the tariffs	(0.9)
Maui Electric
Regulatory Projects and Legal Obligations [Line Items]
2019 Annual incremental RAM adjusted revenues,net of changes in Tax Act adjustment	5.4
Annual change in accrued RBA balance as of December 31, 2018 (and associated revenue taxes) which incorporates MPIR recovery	(0.8)
Net annual incremental amount to be collected (refunded) under the tariffs	(0.4)
Net annual incremental amount to be collected (refunded) under the tariffs	$ 5.8
2017 Tax Act Adjustment		$ 2.8

Electric utility segment - Most

Electric utility segment - Most Recent Proceedings (Details) - USD ($) $ in Millions	Nov. 13, 2019	Aug. 21, 2019	Mar. 18, 2019	Dec. 14, 2018
Hawaiian Electric
Regulatory Projects and Legal Obligations [Line Items]
General rate increase, revenue, percent		4.10%
Revenue, calculation assumption, rate of return		8.00%
Stipulated return on average common equity rate		10.50%
General rate increase, revenue		$ 77.6
Maui Electric
Regulatory Projects and Legal Obligations [Line Items]
Stipulated return on average common equity rate			9.50%
Interim general rate increase			$ 12.2
Interim general rate increase, effective interest rate of return			7.43%
Interim general rate increase, common equity capitalization			57.00%
Interim general rate increase, rate base			$ 454
General rate increase, risk sharing percentage, ratepayer			98.00%
General rate increase, risk sharing percentage, utility			2.00%
General rate increase, maximum exposure cap			$ 0.6
Hawaii Electric Light
Regulatory Projects and Legal Obligations [Line Items]
General rate increase, revenue, percent				3.40%
Revenue, calculation assumption, rate of return				8.30%
Stipulated return on average common equity rate	9.50%			10.50%
Interim general rate increase, effective interest rate of return	7.52%
Interim general rate increase, common equity capitalization	58.00%
Interim general rate increase, rate base	$ 534
General rate increase, revenue				$ 13.4
Interim revenue requirement	$ 387

Electric utility segment - Cons

Electric utility segment - Consolidating Statement of Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Income Statements, Captions [Line Items]
Revenues	$ 725,966	$ 771,535	$ 715,485	$ 661,615	$ 761,650	$ 768,048	$ 685,277	$ 645,874	$ 2,874,601	$ 2,860,849	$ 2,555,625
Expenses
Total expenses									2,525,927	2,527,493	2,209,392
Operating income	100,795	97,308	72,634	77,937	84,604	98,064	78,799	71,889	348,674	333,356	346,233
Allowance for equity funds used during construction									11,987	10,877	12,483
Retirement defined benefits expense—other than service costs									(2,806)	(5,962)	(7,942)
Allowance for borrowed funds used during construction									4,453	4,867	4,778
Income before income taxes									271,409	254,461	276,580
Income taxes									51,637	50,797	109,393
Net income (loss)	66,736	63,890	42,985	46,161	50,046	66,371	46,527	40,720	219,772	203,664	167,187
Preferred stock dividends of subsidiaries									1,890	1,890	1,890
Net income for common stock	66,263	63,419	42,512	45,688	49,573	65,900	46,054	40,247	217,882	201,774	165,297
Parent Company
Expenses
Total expenses									20,335	20,621	17,622
Retirement defined benefits expense—other than service costs									(442)	(674)	(1,119)
Income before income taxes									208,075	193,442	159,765
Income taxes									(9,807)	(8,332)	(5,532)
Net income (loss)									217,882	201,774	165,297
Hawaiian Electric Company, Inc. and Subsidiaries
Condensed Income Statements, Captions [Line Items]
Revenues	645,333	688,330	633,784	578,495	680,563	687,409	608,126	570,427	2,545,942	2,546,525	2,257,566
Expenses
Fuel oil									720,709	760,528	587,768
Purchased power									633,256	639,307	586,634
Other operation and maintenance									481,737	461,491	411,907
Depreciation									215,731	203,626	192,784
Taxes, other than income taxes									240,131	239,912	214,949
Total expenses									2,291,564	2,304,864	1,994,042
Operating income	70,331	71,793	55,694	56,560	61,112	74,036	55,144	51,369	254,378	241,661	263,524
Allowance for equity funds used during construction									11,987	10,877	12,483
Equity in earnings of subsidiaries									0	0	0
Retirement defined benefits expense—other than service costs									(2,836)	(3,631)	(6,003)
Interest expense and other charges, net									(70,842)	(73,348)	(69,637)
Allowance for borrowed funds used during construction									4,453	4,867	4,778
Income before income taxes									197,140	180,426	205,145
Income taxes									38,305	34,778	83,199
Net income (loss)	45,860	47,277	33,073	32,625	35,796	50,210	31,668	27,974	158,835	145,648	121,946
Preferred stock dividends of subsidiaries									915	915	915
Net income attributable to Hawaiian Electric									157,920	144,733	121,031
Preferred stock dividends of Hawaiian Electric									1,080	1,080	1,080
Net income for common stock	$ 45,361	$ 46,779	$ 32,574	$ 32,126	$ 35,297	$ 49,712	$ 31,169	$ 27,475	156,840	143,653	119,951
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Parent Company
Condensed Income Statements, Captions [Line Items]
Revenues									1,803,698	1,802,550	1,598,504
Expenses
Fuel oil									494,728	523,706	408,204
Purchased power									494,215	494,450	454,189
Other operation and maintenance									319,771	313,346	274,391
Depreciation									143,470	137,410	130,889
Taxes, other than income taxes									170,979	170,363	152,933
Total expenses									1,623,163	1,639,275	1,420,606
Operating income									180,535	163,275	177,898
Allowance for equity funds used during construction									9,955	9,208	10,896
Equity in earnings of subsidiaries									43,167	45,393	38,057
Retirement defined benefits expense—other than service costs									(2,287)	(2,649)	(5,049)
Interest expense and other charges, net									(51,199)	(52,180)	(48,277)
Allowance for borrowed funds used during construction									3,666	4,019	4,089
Income before income taxes									183,837	167,066	177,614
Income taxes									25,917	22,333	56,583
Net income (loss)									157,920	144,733	121,031
Preferred stock dividends of subsidiaries									0	0	0
Net income attributable to Hawaiian Electric									157,920	144,733	121,031
Preferred stock dividends of Hawaiian Electric									1,080	1,080	1,080
Net income for common stock									156,840	143,653	119,951
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Hawaii Electric Light
Condensed Income Statements, Captions [Line Items]
Revenues									364,590	375,493	333,467
Expenses
Fuel oil									84,565	90,792	63,894
Purchased power									90,989	95,838	87,772
Other operation and maintenance									76,091	70,396	66,184
Depreciation									41,812	40,235	38,741
Taxes, other than income taxes									33,787	34,850	31,184
Total expenses									327,244	332,111	287,775
Operating income									37,346	43,382	45,692
Allowance for equity funds used during construction									816	478	554
Equity in earnings of subsidiaries									0	0	0
Retirement defined benefits expense—other than service costs									(422)	(417)	(93)
Interest expense and other charges, net									(10,741)	(11,836)	(11,799)
Allowance for borrowed funds used during construction									342	276	238
Income before income taxes									27,341	31,883	34,592
Income taxes									5,990	6,868	13,912
Net income (loss)									21,351	25,015	20,680
Preferred stock dividends of subsidiaries									534	534	534
Net income attributable to Hawaiian Electric									20,817	24,481	20,146
Preferred stock dividends of Hawaiian Electric									0	0	0
Net income for common stock									20,817	24,481	20,146
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Maui Electric
Condensed Income Statements, Captions [Line Items]
Revenues									378,202	368,700	325,678
Expenses
Fuel oil									141,416	146,030	115,670
Purchased power									48,052	49,019	44,673
Other operation and maintenance									85,875	77,749	71,332
Depreciation									30,449	25,981	23,154
Taxes, other than income taxes									35,365	34,699	30,832
Total expenses									341,157	333,478	285,661
Operating income									37,045	35,222	40,017
Allowance for equity funds used during construction									1,216	1,191	1,033
Equity in earnings of subsidiaries									0	0	0
Retirement defined benefits expense—other than service costs									(127)	(565)	(861)
Interest expense and other charges, net									(9,450)	(9,550)	(9,644)
Allowance for borrowed funds used during construction									445	572	451
Income before income taxes									29,129	26,870	30,996
Income taxes									6,398	5,577	12,704
Net income (loss)									22,731	21,293	18,292
Preferred stock dividends of subsidiaries									381	381	381
Net income attributable to Hawaiian Electric									22,350	20,912	17,911
Preferred stock dividends of Hawaiian Electric									0	0	0
Net income for common stock									22,350	20,912	17,911
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Other subsidiaries
Condensed Income Statements, Captions [Line Items]
Revenues									0	0	0
Expenses
Fuel oil									0	0	0
Purchased power									0	0	0
Other operation and maintenance									0	0	0
Depreciation									0	0	0
Taxes, other than income taxes									0	0	0
Total expenses									0	0	0
Operating income									0	0	0
Allowance for equity funds used during construction									0	0	0
Equity in earnings of subsidiaries									0	0	0
Retirement defined benefits expense—other than service costs									0	0	0
Interest expense and other charges, net									0		0
Allowance for borrowed funds used during construction									0	0	0
Income before income taxes									0	0	0
Income taxes									0	0	0
Net income (loss)									0	0	0
Preferred stock dividends of subsidiaries									0	0	0
Net income attributable to Hawaiian Electric									0	0	0
Preferred stock dividends of Hawaiian Electric									0	0	0
Net income for common stock									0	0	0
Hawaiian Electric Company, Inc. and Subsidiaries | Consolidating Adjustments
Condensed Income Statements, Captions [Line Items]
Revenues									(548)	(218)	(83)
Expenses
Fuel oil									0	0	0
Purchased power									0	0	0
Other operation and maintenance									0	0	0
Depreciation									0	0	0
Taxes, other than income taxes									0	0	0
Total expenses									0	0	0
Operating income									(548)	(218)	(83)
Allowance for equity funds used during construction									0	0	0
Equity in earnings of subsidiaries									(43,167)	(45,393)	(38,057)
Retirement defined benefits expense—other than service costs									0	0	0
Interest expense and other charges, net									548	218	83
Allowance for borrowed funds used during construction									0	0	0
Income before income taxes									(43,167)	(45,393)	(38,057)
Income taxes									0	0	0
Net income (loss)									(43,167)	(45,393)	(38,057)
Preferred stock dividends of subsidiaries									0	0	0
Net income attributable to Hawaiian Electric									(43,167)	(45,393)	(38,057)
Preferred stock dividends of Hawaiian Electric									0	0	0
Net income for common stock									$ (43,167)	$ (45,393)	$ (38,057)

Electric utility segment - Co_2

Electric utility segment - Consolidating Statement of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Statement of Income Captions [Line Items]
Net income for common stock	$ 66,263	$ 63,419	$ 42,512	$ 45,688	$ 49,573	$ 65,900	$ 46,054	$ 40,247	$ 217,882	$ 201,774	$ 165,297
Derivatives qualified as cash flow hedges:
Reclassification adjustment to net income, net of (taxes) benefit									0	0	454
Retirement benefit plans:
Net gains (losses) arising during the period, net of (taxes) benefits									10,914	(28,101)	65,531
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits									10,107	21,015	15,737
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits									(16,177)	8,325	(78,724)
Other comprehensive income (loss), net of taxes									30,571	(8,669)	(1,372)
Comprehensive income									248,453	193,105	163,925
Hawaiian Electric Company, Inc. and Subsidiaries
Condensed Statement of Income Captions [Line Items]
Net income for common stock	$ 45,361	$ 46,779	$ 32,574	$ 32,126	$ 35,297	$ 49,712	$ 31,169	$ 27,475	156,840	143,653	119,951
Derivatives qualified as cash flow hedges:
Reclassification adjustment to net income, net of (taxes) benefit									0	0	454
Retirement benefit plans:
Net gains (losses) arising during the period, net of (taxes) benefits									5,249	(26,019)	63,105
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits									9,550	19,012	14,477
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits									(16,177)	8,325	(78,724)
Other comprehensive income (loss), net of taxes									(1,378)	1,318	(688)
Comprehensive income									155,462	144,971	119,263
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Parent Company
Condensed Statement of Income Captions [Line Items]
Net income for common stock									156,840	143,653	119,951
Derivatives qualified as cash flow hedges:
Reclassification adjustment to net income, net of (taxes) benefit											454
Retirement benefit plans:
Net gains (losses) arising during the period, net of (taxes) benefits									5,249	(26,019)	63,105
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits									9,550	19,012	14,477
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits									(16,177)	8,325	(78,724)
Other comprehensive income (loss), net of taxes									(1,378)	1,318	(688)
Comprehensive income									155,462	144,971	119,263
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Hawaii Electric Light
Condensed Statement of Income Captions [Line Items]
Net income for common stock									20,817	24,481	20,146
Derivatives qualified as cash flow hedges:
Reclassification adjustment to net income, net of (taxes) benefit											0
Retirement benefit plans:
Net gains (losses) arising during the period, net of (taxes) benefits									373	(6,090)	3,093
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits									1,455	2,819	1,903
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits									(1,840)	3,305	(4,994)
Other comprehensive income (loss), net of taxes									(12)	34	2
Comprehensive income									20,805	24,515	20,148
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Maui Electric
Condensed Statement of Income Captions [Line Items]
Net income for common stock									22,350	20,912	17,911
Derivatives qualified as cash flow hedges:
Reclassification adjustment to net income, net of (taxes) benefit											0
Retirement benefit plans:
Net gains (losses) arising during the period, net of (taxes) benefits									(204)	(5,004)	7,329
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits									1,182	2,423	1,619
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits									(1,152)	2,788	(9,003)
Other comprehensive income (loss), net of taxes									(174)	207	(55)
Comprehensive income									22,176	21,119	17,856
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Other subsidiaries
Condensed Statement of Income Captions [Line Items]
Net income for common stock									0	0	0
Derivatives qualified as cash flow hedges:
Reclassification adjustment to net income, net of (taxes) benefit											0
Retirement benefit plans:
Net gains (losses) arising during the period, net of (taxes) benefits									0	0	0
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits									0	0	0
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits									0	0	0
Other comprehensive income (loss), net of taxes									0	0	0
Comprehensive income									0	0	0
Hawaiian Electric Company, Inc. and Subsidiaries | Consolidating Adjustments
Condensed Statement of Income Captions [Line Items]
Net income for common stock									(43,167)	(45,393)	(38,057)
Derivatives qualified as cash flow hedges:
Reclassification adjustment to net income, net of (taxes) benefit											0
Retirement benefit plans:
Net gains (losses) arising during the period, net of (taxes) benefits									(169)	11,094	(10,422)
Adjustment for amortization of prior service credit and net losses recognized during the period in net periodic benefit cost, net of tax benefits									(2,637)	(5,242)	(3,522)
Reclassification adjustment for impact of D&Os of the PUC included in regulatory assets, net of (taxes) benefits									2,992	(6,093)	13,997
Other comprehensive income (loss), net of taxes									186	(241)	53
Comprehensive income									$ (42,981)	$ (45,634)	$ (38,004)

Electric utility segment - Co_3

Electric utility segment - Consolidating Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Utility property, plant and equipment
Total property, plant and equipment, net	$ 5,109,628	$ 4,830,118
Current assets
Cash and cash equivalents	196,813	169,208	$ 261,881
Restricted cash	30,872	0
Other long-term assets
Operating lease right-of-use-assets	199,171
Total assets	13,745,251	13,104,051	12,534,160
Capitalization
Common stock equity	2,280,260	2,162,280	2,097,386	$ 2,066,753
Cumulative preferred stock – not subject to mandatory redemption	0	0
Current portion of operating lease liabilities	63,707
Current liabilities
Interest and dividends payable	24,941	28,254
Deferred credits and other liabilities
Deferred income taxes	379,324	372,518
Total capitalization and liabilities	13,745,251	13,104,051
Parent Company
Utility property, plant and equipment
Total property, plant and equipment, net	2,931	3,456
Other long-term assets
Total assets	2,821,587	2,657,739
Capitalization
Common stock equity	2,280,260	2,162,280
Cumulative preferred stock – not subject to mandatory redemption	0	0
Deferred credits and other liabilities
Total capitalization and liabilities	2,821,587	2,657,739
Hawaiian Electric Company, Inc. and Subsidiaries
Utility property, plant and equipment
Land	51,816	49,667
Plant and equipment	7,240,288	6,809,671
Less accumulated depreciation	(2,690,157)	(2,577,342)
Construction in progress	193,074	233,145
Utility property, plant and equipment, net	4,795,021	4,515,141
Nonutility property, plant and equipment, less accumulated depreciation	6,956	6,961
Total property, plant and equipment, net	4,801,977	4,522,102
Investment in wholly-owned subsidiaries, at equity	0	0
Current assets
Cash and cash equivalents	11,022	35,877	12,517
Restricted cash	30,872
Advances to affiliates	0
Customer accounts receivable, net	152,790	177,896
Accrued unbilled revenues, net	117,227	121,738
Other accounts receivable, net	11,568	6,215
Fuel oil stock, at average cost	91,937	79,935
Materials and supplies, at average cost	60,702	55,204
Prepayments and other	116,980	32,118
Regulatory assets	30,710	71,016
Total current assets	623,808	579,999
Other long-term assets
Operating lease right-of-use-assets	176,809
Regulatory assets	684,370	762,410
Other	101,718	102,992
Total other long-term assets	962,897	865,402
Total assets	6,388,682	5,967,503
Capitalization
Common stock equity	2,047,352	1,957,641	1,845,283	1,799,787
Cumulative preferred stock – not subject to mandatory redemption	34,293	34,293
Long-term debt, net	1,401,714	1,418,802
Total capitalization	3,483,359	3,410,736
Current portion of operating lease liabilities	63,707
Current liabilities
Current portion of long-term debt, net	95,953	0
Short-term borrowings from non-affiliate	88,987	25,000
Short-term borrowings-affiliate	0
Accounts payable	187,770	171,791
Interest and dividends payable	20,728	23,215
Taxes accrued, including revenue taxes	207,992	233,333
Regulatory liabilities	30,724	17,977
Other	67,305	60,003
Total current liabilities	763,166	531,319
Operating lease liabilities	113,400
Deferred credits and other liabilities
Deferred income taxes	377,150	383,197
Regulatory liabilities	941,586	932,259
Unamortized tax credits	117,868	91,522
Defined benefit pension and other postretirement benefit plans liability	478,763	503,659
Other	113,390	114,811
Total deferred credits and other liabilities	2,142,157	2,025,448
Total capitalization and liabilities	6,388,682	5,967,503
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Parent Company
Utility property, plant and equipment
Land	42,598	40,449
Plant and equipment	4,765,362	4,456,090
Less accumulated depreciation	(1,591,241)	(1,523,861)
Construction in progress	165,137	193,677
Utility property, plant and equipment, net	3,381,856	3,166,355
Nonutility property, plant and equipment, less accumulated depreciation	5,310	5,314
Total property, plant and equipment, net	3,387,166	3,171,669
Investment in wholly-owned subsidiaries, at equity	591,969	576,838
Current assets
Cash and cash equivalents	2,239	16,732
Restricted cash	30,749
Advances to affiliates	27,700
Customer accounts receivable, net	105,454	125,960
Accrued unbilled revenues, net	83,148	88,060
Other accounts receivable, net	18,396	21,962
Fuel oil stock, at average cost	69,003	54,262
Materials and supplies, at average cost	34,876	30,291
Prepayments and other	88,334	23,214
Regulatory assets	27,689	60,093
Total current assets	487,588	420,574
Other long-term assets
Operating lease right-of-use-assets	174,886
Regulatory assets	476,390	537,708
Other	69,010	69,749
Total other long-term assets	720,286	607,457
Total assets	5,187,009	4,776,538
Capitalization
Common stock equity	2,047,352	1,957,641	1,845,283	1,799,787
Cumulative preferred stock – not subject to mandatory redemption	22,293	22,293
Long-term debt, net	1,006,737	1,000,137
Total capitalization	3,076,382	2,980,071
Current portion of operating lease liabilities	63,582
Current liabilities
Current portion of long-term debt, net	61,958
Short-term borrowings from non-affiliate	88,987	25,000
Short-term borrowings-affiliate	8,000
Accounts payable	139,056	126,384
Interest and dividends payable	14,759	16,203
Taxes accrued, including revenue taxes	143,522	164,747
Regulatory liabilities	13,363	7,699
Other	51,295	46,391
Total current liabilities	584,522	386,424
Operating lease liabilities	111,598
Deferred credits and other liabilities
Deferred income taxes	265,864	271,438
Regulatory liabilities	664,894	657,210
Unamortized tax credits	86,852	60,271
Defined benefit pension and other postretirement benefit plans liability	339,471	359,174
Other	57,426	61,950
Total deferred credits and other liabilities	1,526,105	1,410,043
Total capitalization and liabilities	5,187,009	4,776,538
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Hawaii Electric Light
Utility property, plant and equipment
Land	5,606	5,606
Plant and equipment	1,313,727	1,259,553
Less accumulated depreciation	(574,615)	(547,848)
Construction in progress	9,993	8,781
Utility property, plant and equipment, net	754,711	726,092
Nonutility property, plant and equipment, less accumulated depreciation	114	115
Total property, plant and equipment, net	754,825	726,207
Investment in wholly-owned subsidiaries, at equity	0	0
Current assets
Cash and cash equivalents	6,885	15,623
Restricted cash	123
Advances to affiliates	8,000
Customer accounts receivable, net	24,520	26,483
Accrued unbilled revenues, net	17,071	17,051
Other accounts receivable, net	1,907	3,131
Fuel oil stock, at average cost	8,901	11,027
Materials and supplies, at average cost	8,313	7,155
Prepayments and other	3,725	5,212
Regulatory assets	1,641	3,177
Total current assets	81,086	88,859
Other long-term assets
Operating lease right-of-use-assets	1,537
Regulatory assets	109,163	120,658
Other	15,493	15,944
Total other long-term assets	126,193	136,602
Total assets	962,104	951,668
Capitalization
Common stock equity	298,998	295,874	286,647	291,291
Cumulative preferred stock – not subject to mandatory redemption	7,000	7,000
Long-term debt, net	206,416	217,749
Total capitalization	512,414	520,623
Current portion of operating lease liabilities	94
Current liabilities
Current portion of long-term debt, net	13,995
Short-term borrowings from non-affiliate	0	0
Short-term borrowings-affiliate	0
Accounts payable	25,629	20,045
Interest and dividends payable	3,115	4,203
Taxes accrued, including revenue taxes	32,541	34,128
Regulatory liabilities	9,454	4,872
Other	11,362	15,077
Total current liabilities	96,190	78,325
Operating lease liabilities	1,442
Deferred credits and other liabilities
Deferred income taxes	53,534	54,936
Regulatory liabilities	178,474	176,101
Unamortized tax credits	16,196	16,217
Defined benefit pension and other postretirement benefit plans liability	69,928	73,147
Other	33,926	32,319
Total deferred credits and other liabilities	353,500	352,720
Total capitalization and liabilities	962,104	951,668
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Maui Electric
Utility property, plant and equipment
Land	3,612	3,612
Plant and equipment	1,161,199	1,094,028
Less accumulated depreciation	(524,301)	(505,633)
Construction in progress	17,944	30,687
Utility property, plant and equipment, net	658,454	622,694
Nonutility property, plant and equipment, less accumulated depreciation	1,532	1,532
Total property, plant and equipment, net	659,986	624,226
Investment in wholly-owned subsidiaries, at equity	0	0
Current assets
Cash and cash equivalents	1,797	3,421
Restricted cash	0
Advances to affiliates	0
Customer accounts receivable, net	22,816	25,453
Accrued unbilled revenues, net	17,008	16,627
Other accounts receivable, net	1,960	3,033
Fuel oil stock, at average cost	14,033	14,646
Materials and supplies, at average cost	17,513	17,758
Prepayments and other	24,921	3,692
Regulatory assets	1,380	7,746
Total current assets	101,428	92,376
Other long-term assets
Operating lease right-of-use-assets	386
Regulatory assets	98,817	104,044
Other	17,215	17,299
Total other long-term assets	116,418	121,343
Total assets	877,832	837,945
Capitalization
Common stock equity	292,870	280,863	270,265	259,554
Cumulative preferred stock – not subject to mandatory redemption	5,000	5,000
Long-term debt, net	188,561	200,916
Total capitalization	486,431	486,779
Current portion of operating lease liabilities	31
Current liabilities
Current portion of long-term debt, net	20,000
Short-term borrowings from non-affiliate	0	0
Short-term borrowings-affiliate	27,700
Accounts payable	23,085	25,362
Interest and dividends payable	2,900	2,841
Taxes accrued, including revenue taxes	31,929	34,458
Regulatory liabilities	7,907	5,406
Other	15,297	20,414
Total current liabilities	128,849	88,481
Operating lease liabilities	360
Deferred credits and other liabilities
Deferred income taxes	57,752	56,823
Regulatory liabilities	98,218	98,948
Unamortized tax credits	14,820	15,034
Defined benefit pension and other postretirement benefit plans liability	69,364	71,338
Other	22,038	20,542
Total deferred credits and other liabilities	262,552	262,685
Total capitalization and liabilities	877,832	837,945
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Other subsidiaries
Utility property, plant and equipment
Land	0	0
Plant and equipment	0	0
Less accumulated depreciation	0	0
Construction in progress	0	0
Utility property, plant and equipment, net	0	0
Nonutility property, plant and equipment, less accumulated depreciation	0	0
Total property, plant and equipment, net	0	0
Investment in wholly-owned subsidiaries, at equity	0	0
Current assets
Cash and cash equivalents	101	101
Restricted cash	0
Advances to affiliates	0
Customer accounts receivable, net	0	0
Accrued unbilled revenues, net	0	0
Other accounts receivable, net	0	0
Fuel oil stock, at average cost	0	0
Materials and supplies, at average cost	0	0
Prepayments and other	0	0
Regulatory assets	0	0
Total current assets	101	101
Other long-term assets
Operating lease right-of-use-assets	0
Regulatory assets	0	0
Other	0	0
Total other long-term assets	0	0
Total assets	101	101
Capitalization
Common stock equity	101	101	101	101
Cumulative preferred stock – not subject to mandatory redemption	0	0
Long-term debt, net	0	0
Total capitalization	101	101
Current portion of operating lease liabilities	0
Current liabilities
Current portion of long-term debt, net	0
Short-term borrowings from non-affiliate	0	0
Short-term borrowings-affiliate	0
Accounts payable	0	0
Interest and dividends payable	0	0
Taxes accrued, including revenue taxes	0	0
Regulatory liabilities	0	0
Other	0	0
Total current liabilities	0	0
Operating lease liabilities	0
Deferred credits and other liabilities
Deferred income taxes	0	0
Regulatory liabilities	0	0
Unamortized tax credits	0	0
Defined benefit pension and other postretirement benefit plans liability	0	0
Other	0	0
Total deferred credits and other liabilities	0	0
Total capitalization and liabilities	101	101
Hawaiian Electric Company, Inc. and Subsidiaries | Consolidating Adjustments
Utility property, plant and equipment
Land	0	0
Plant and equipment	0	0
Less accumulated depreciation	0	0
Construction in progress	0	0
Utility property, plant and equipment, net	0	0
Nonutility property, plant and equipment, less accumulated depreciation	0	0
Total property, plant and equipment, net	0	0
Investment in wholly-owned subsidiaries, at equity	(591,969)	(576,838)
Current assets
Cash and cash equivalents	0	0
Restricted cash	0
Advances to affiliates	(35,700)
Customer accounts receivable, net	0	0
Accrued unbilled revenues, net	0	0
Other accounts receivable, net	(10,695)	(21,911)
Fuel oil stock, at average cost	0	0
Materials and supplies, at average cost	0	0
Prepayments and other	0	0
Regulatory assets	0	0
Total current assets	(46,395)	(21,911)
Other long-term assets
Operating lease right-of-use-assets	0
Regulatory assets	0	0
Other	0	0
Total other long-term assets	0	0
Total assets	(638,364)	(598,749)
Capitalization
Common stock equity	(591,969)	(576,838)	$ (557,013)	$ (550,946)
Cumulative preferred stock – not subject to mandatory redemption	0	0
Long-term debt, net	0	0
Total capitalization	(591,969)	(576,838)
Current portion of operating lease liabilities	0
Current liabilities
Current portion of long-term debt, net	0
Short-term borrowings from non-affiliate	0	0
Short-term borrowings-affiliate	(35,700)
Accounts payable	0	0
Interest and dividends payable	(46)	(32)
Taxes accrued, including revenue taxes	0	0
Regulatory liabilities	0	0
Other	(10,649)	(21,879)
Total current liabilities	(46,395)	(21,911)
Operating lease liabilities	0
Deferred credits and other liabilities
Deferred income taxes	0	0
Regulatory liabilities	0	0
Unamortized tax credits	0	0
Defined benefit pension and other postretirement benefit plans liability	0	0
Other	0	0
Total deferred credits and other liabilities	0	0
Total capitalization and liabilities	$ (638,364)	$ (598,749)

Electric utility segment - Co_4

Electric utility segment - Consolidating Statements of Changes in Common Stock Equity (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Increase (decrease) in stockholders' equity
Beginning Balance				$ 2,162,280				$ 2,097,386	$ 2,162,280	$ 2,097,386	$ 2,066,753
Net income for common stock	$ 66,263	$ 63,419	$ 42,512	45,688	$ 49,573	$ 65,900	$ 46,054	40,247	217,882	201,774	165,297
Other comprehensive income (loss), net of tax benefits									30,571	(8,669)	(1,372)
Common stock dividends									(139,463)	(134,987)	(134,873)
Ending Balance	2,280,260				2,162,280				2,280,260	2,162,280	2,097,386
Parent Company
Increase (decrease) in stockholders' equity
Beginning Balance				2,162,280					2,162,280
Ending Balance	2,280,260				2,162,280				2,280,260	2,162,280
Hawaiian Electric Company, Inc. and Subsidiaries
Increase (decrease) in stockholders' equity
Beginning Balance				1,957,641				1,845,283	1,957,641	1,845,283	1,799,787
Net income for common stock	45,361	$ 46,779	$ 32,574	32,126	35,297	$ 49,712	$ 31,169	27,475	156,840	143,653	119,951
Other comprehensive income (loss), net of tax benefits									(1,378)	1,318	(688)
Issuance of common stock, net of expenses									35,501	70,692	14,000
Common stock dividends									(101,252)	(103,305)	(87,767)
Ending Balance	2,047,352				1,957,641				2,047,352	1,957,641	1,845,283
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Parent Company
Increase (decrease) in stockholders' equity
Beginning Balance				1,957,641				1,845,283	1,957,641	1,845,283	1,799,787
Net income for common stock									156,840	143,653	119,951
Other comprehensive income (loss), net of tax benefits									(1,378)	1,318	(688)
Issuance of common stock, net of expenses									35,501	70,692	14,000
Common stock dividends									(101,252)	(103,305)	(87,767)
Ending Balance	2,047,352				1,957,641				2,047,352	1,957,641	1,845,283
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Hawaii Electric Light
Increase (decrease) in stockholders' equity
Beginning Balance				295,874				286,647	295,874	286,647	291,291
Net income for common stock									20,817	24,481	20,146
Other comprehensive income (loss), net of tax benefits									(12)	34	2
Issuance of common stock, net of expenses									(1)	1	4
Common stock dividends									(17,680)	(15,289)	(24,796)
Ending Balance	298,998				295,874				298,998	295,874	286,647
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Maui Electric
Increase (decrease) in stockholders' equity
Beginning Balance				280,863				270,265	280,863	270,265	259,554
Net income for common stock									22,350	20,912	17,911
Other comprehensive income (loss), net of tax benefits									(174)	207	(55)
Issuance of common stock, net of expenses									4,899	1,498	4,801
Common stock dividends									(15,068)	(12,019)	(11,946)
Ending Balance	292,870				280,863				292,870	280,863	270,265
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Other subsidiaries
Increase (decrease) in stockholders' equity
Beginning Balance				101				101	101	101	101
Net income for common stock									0	0	0
Other comprehensive income (loss), net of tax benefits									0	0	0
Issuance of common stock, net of expenses									0	0	0
Common stock dividends									0	0	0
Ending Balance	101				101				101	101	101
Hawaiian Electric Company, Inc. and Subsidiaries | Consolidating Adjustments
Increase (decrease) in stockholders' equity
Beginning Balance				$ (576,838)				$ (557,013)	(576,838)	(557,013)	(550,946)
Net income for common stock									(43,167)	(45,393)	(38,057)
Other comprehensive income (loss), net of tax benefits									186	(241)	53
Issuance of common stock, net of expenses									(4,898)	(1,499)	(4,805)
Common stock dividends									32,748	27,308	36,742
Ending Balance	$ (591,969)				$ (576,838)				$ (591,969)	$ (576,838)	$ (557,013)

Electric utility segment - Co_5

Electric utility segment - Consolidating Statement of Cash Flows (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net income (loss)	$ 66,736,000	$ 63,890,000	$ 42,985,000	$ 46,161,000	$ 50,046,000	$ 66,371,000	$ 46,527,000	$ 40,720,000	$ 219,772,000	$ 203,664,000	$ 167,187,000
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation of property, plant and equipment									229,858,000	214,036,000	200,658,000
Other amortization									48,255,000	41,593,000	21,340,000
Deferred income taxes									(15,085,000)	(9,368,000)	37,835,000
Allowance for equity funds used during construction									(11,987,000)	(10,877,000)	(12,483,000)
Other									10,822,000	(4,219,000)	(3,324,000)
Changes in assets and liabilities
Decrease (increase) in fuel oil stock									(11,493,000)	7,054,000	(20,794,000)
Decrease (increase) in regulatory assets									71,262,000	9,252,000	(17,256,000)
Change in prepaid and accrued income taxes, tax credits and revenue taxes									(27,538,000)	29,429,000	20,685,000
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability									(4,482,000)	20,871,000	882,000
Net cash provided by operating activities									512,470,000	499,312,000	420,441,000
Cash flows from investing activities
Capital expenditures									(457,520,000)	(537,369,000)	(495,187,000)
Other, net									13,292,000	14,534,000	7,487,000
Net cash used in investing activities									(541,709,000)	(792,059,000)	(815,299,000)
Cash flows from financing activities
Common stock dividends									(139,463,000)	(134,987,000)	(134,873,000)
Proceeds from issuance of long-term debt									289,349,000	250,000,000	532,325,000
Repayment of long-term debt and funds transferred for repayment of long-term debt									(287,285,000)	(53,887,000)	(465,000,000)
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less									86,718,000	(18,999,000)	67,992,000
Proceeds from issuance of short-term debt									75,000,000	25,000,000	125,000,000
Net increase in other bank borrowings with original maturities of three months or less									5,070,000	71,556,000	61,776,000
Repayment of short-term debt									(50,000,000)	(50,000,000)	(75,000,000)
Other									(1,836,000)	(1,603,000)	(6,349,000)
Net cash used in financing activities									87,716,000	200,074,000	378,287,000
Net decrease in cash and equivalents									58,477,000	(92,673,000)	(16,571,000)
Cash, cash equivalents and restricted cash, January 1				169,208,000				261,881,000	169,208,000	261,881,000	278,452,000
Cash, cash equivalents and restricted cash, December 31	227,685,000				169,208,000				227,685,000	169,208,000	261,881,000
Less: Restricted cash	(30,872,000)				0				(30,872,000)	0	0
Cash and cash equivalents	196,813,000				169,208,000				196,813,000	169,208,000	261,881,000
Parent Company
Cash flows from operating activities
Net income (loss)									217,882,000	201,774,000	165,297,000
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation of property, plant and equipment									570,000	597,000	548,000
Changes in assets and liabilities
Net cash provided by operating activities									131,120,000	135,470,000	99,600,000
Cash flows from investing activities
Capital expenditures									(47,000)	(143,000)	(317,000)
Other, net									(1,001,000)	140,000	(177,000)
Net cash used in investing activities									(41,170,000)	(92,569,000)	(26,456,000)
Cash flows from financing activities
Common stock dividends									(139,463,000)	(134,987,000)	(134,873,000)
Proceeds from issuance of long-term debt									0	150,000,000	150,000,000
Repayment of long-term debt and funds transferred for repayment of long-term debt									0	0	(200,000,000)
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less									47,731,000	(14,000,000)	62,993,000
Proceeds from issuance of short-term debt									0	0	125,000,000
Repayment of short-term debt									0	(50,000,000)	(75,000,000)
Other									(10,000)	(848,000)	(756,000)
Net cash used in financing activities									(92,739,000)	(50,861,000)	(76,366,000)
Net decrease in cash and equivalents									(2,789,000)	(7,960,000)	(3,222,000)
Cash, cash equivalents and restricted cash, January 1				3,742,000				11,702,000	3,742,000	11,702,000	14,924,000
Cash, cash equivalents and restricted cash, December 31	953,000				3,742,000				953,000	3,742,000	11,702,000
Hawaiian Electric Company, Inc. and Subsidiaries
Cash flows from operating activities
Net income (loss)	45,860,000	$ 47,277,000	$ 33,073,000	32,625,000	35,796,000	$ 50,210,000	$ 31,668,000	27,974,000	158,835,000	145,648,000	121,946,000
Adjustments to reconcile net income to net cash provided by operating activities
Equity in earnings									(37,000)	(100,000)	(100,000)
Common stock dividends received from subsidiaries									35,000	100,000	125,000
Depreciation of property, plant and equipment									215,731,000	203,626,000	192,784,000
Other amortization									29,631,000	26,602,000	8,498,000
Deferred income taxes									(16,284,000)	(7,982,000)	38,037,000
Income tax credits, net									27,259,000	(99,000)	(52,000)
State refundable credit									(8,369,000)	(6,239,000)	(2,251,000)
Allowance for equity funds used during construction									(11,987,000)	(10,877,000)	(12,483,000)
Other									200,000	4,768,000	1,237,000
Changes in assets and liabilities
Decrease (increase) in accounts receivable									20,956,000	(50,917,000)	2,914,000
Decrease (increase) in accrued unbilled revenues									4,511,000	(14,684,000)	(15,361,000)
Decrease (increase) in fuel oil stock									(12,002,000)	6,938,000	(20,443,000)
Decrease (increase) in materials and supplies									(5,498,000)	(807,000)	(718,000)
Decrease (increase) in regulatory assets									71,262,000	9,252,000	(17,256,000)
Increase in regulatory liabilities									1,953,000	37,358,000	3,602,000
Increase (decrease) in accounts payable									(2,051,000)	24,358,000	25,734,000
Change in prepaid and accrued income taxes, tax credits and revenue taxes									(28,523,000)	25,036,000	29,862,000
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability									(4,448,000)	18,746,000	604,000
Changes in other assets and liabilities									(17,218,000)	(17,114,000)	(21,493,000)
Net cash provided by operating activities									423,956,000	393,613,000	335,186,000
Cash flows from investing activities
Capital expenditures									(419,898,000)	(415,264,000)	(376,865,000)
Advances from (to) affiliates									0	0	0
Other, net									11,374,000	10,082,000	4,578,000
Net cash used in investing activities									(408,524,000)	(405,182,000)	(372,287,000)
Cash flows from financing activities
Common stock dividends									(101,252,000)	(103,305,000)	(87,767,000)
Preferred stock dividends of Hawaiian Electric and subsidiaries									(1,995,000)	(1,995,000)	(1,995,000)
Net proceeds from issuance of common stock									35,500,000	70,700,000	14,000,000
Proceeds from issuance of long-term debt									280,000,000	100,000,000	315,000,000
Repayment of long-term debt and funds transferred for repayment of long-term debt									(283,546,000)	(50,000,000)	(265,000,000)
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less									38,987,000	(4,999,000)	4,999,000
Proceeds from issuance of short-term debt										25,000,000
Net increase in other bank borrowings with original maturities of three months or less									75,000,000
Repayment of short-term debt									(50,000,000)	0	0
Other									(2,109,000)	(472,000)	(3,905,000)
Net cash used in financing activities									(9,415,000)	34,929,000	(24,668,000)
Net decrease in cash and equivalents									6,017,000	23,360,000	(61,769,000)
Cash, cash equivalents and restricted cash, January 1				35,877,000				12,517,000	35,877,000	12,517,000	74,286,000
Cash, cash equivalents and restricted cash, December 31	41,894,000				35,877,000				41,894,000	35,877,000	12,517,000
Less: Restricted cash	(30,872,000)				0				(30,872,000)	0	0
Cash and cash equivalents	11,022,000				35,877,000				11,022,000	35,877,000	12,517,000
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Parent Company
Cash flows from operating activities
Net income (loss)									157,920,000	144,733,000	121,031,000
Adjustments to reconcile net income to net cash provided by operating activities
Equity in earnings									(43,204,000)	(45,493,000)	(38,157,000)
Common stock dividends received from subsidiaries									32,783,000	27,408,000	36,867,000
Depreciation of property, plant and equipment									143,470,000	137,410,000	130,889,000
Other amortization									23,351,000	20,956,000	2,398,000
Deferred income taxes									(13,547,000)	(9,806,000)	26,342,000
Income tax credits, net									27,277,000	(83,000)	(35,000)
State refundable credit									(6,245,000)	(4,941,000)	(1,382,000)
Allowance for equity funds used during construction									(9,955,000)	(9,208,000)	(10,896,000)
Other									298,000	3,991,000	263,000
Changes in assets and liabilities
Decrease (increase) in accounts receivable									25,376,000	(51,656,000)	1,817,000
Decrease (increase) in accrued unbilled revenues									4,912,000	(10,884,000)	(11,355,000)
Decrease (increase) in fuel oil stock									(14,741,000)	10,710,000	(17,733,000)
Decrease (increase) in materials and supplies									(4,585,000)	(1,966,000)	1,603,000
Decrease (increase) in regulatory assets									55,494,000	12,192,000	(8,395,000)
Increase in regulatory liabilities									102,000	26,540,000	2,552,000
Increase (decrease) in accounts payable									4,687,000	14,748,000	23,519,000
Change in prepaid and accrued income taxes, tax credits and revenue taxes									(24,900,000)	24,438,000	16,716,000
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability									(3,033,000)	17,178,000	709,000
Changes in other assets and liabilities									(15,341,000)	(8,056,000)	(18,765,000)
Net cash provided by operating activities									340,119,000	298,211,000	257,988,000
Cash flows from investing activities
Capital expenditures									(311,538,000)	(305,703,000)	(281,752,000)
Advances from (to) affiliates									(27,700,000)	0	0
Other, net									5,241,000	3,226,000	(1,711,000)
Net cash used in investing activities									(333,997,000)	(302,477,000)	(283,463,000)
Cash flows from financing activities
Common stock dividends									(101,252,000)	(103,305,000)	(87,767,000)
Preferred stock dividends of Hawaiian Electric and subsidiaries									(1,080,000)	(1,080,000)	(1,080,000)
Net proceeds from issuance of common stock									35,500,000	70,700,000	14,000,000
Proceeds from issuance of long-term debt									190,000,000	75,000,000	202,000,000
Repayment of long-term debt and funds transferred for repayment of long-term debt									(183,546,000)	(30,000,000)	(162,000,000)
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less									46,987,000	(16,999,000)	3,499,000
Proceeds from issuance of short-term debt										25,000,000
Net increase in other bank borrowings with original maturities of three months or less									75,000,000
Repayment of short-term debt									(50,000,000)
Other									(1,475,000)	(377,000)	(2,506,000)
Net cash used in financing activities									10,134,000	18,939,000	(33,854,000)
Net decrease in cash and equivalents									16,256,000	14,673,000	(59,329,000)
Cash, cash equivalents and restricted cash, January 1				16,732,000				2,059,000	16,732,000	2,059,000	61,388,000
Cash, cash equivalents and restricted cash, December 31	32,988,000				16,732,000				32,988,000	16,732,000	2,059,000
Less: Restricted cash	(30,749,000)								(30,749,000)
Cash and cash equivalents	2,239,000				16,732,000				2,239,000	16,732,000
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Hawaii Electric Light
Cash flows from operating activities
Net income (loss)									21,351,000	25,015,000	20,680,000
Adjustments to reconcile net income to net cash provided by operating activities
Equity in earnings									0	0	0
Common stock dividends received from subsidiaries									0	0	0
Depreciation of property, plant and equipment									41,812,000	40,235,000	38,741,000
Other amortization									4,810,000	5,069,000	3,225,000
Deferred income taxes									(2,383,000)	(341,000)	3,954,000
Income tax credits, net									(13,000)	(14,000)	(16,000)
State refundable credit									(559,000)	(547,000)	(528,000)
Allowance for equity funds used during construction									(816,000)	(478,000)	(554,000)
Other									(48,000)	348,000	974,000
Changes in assets and liabilities
Decrease (increase) in accounts receivable									3,326,000	(4,867,000)	(359,000)
Decrease (increase) in accrued unbilled revenues									(20,000)	(1,111,000)	(2,376,000)
Decrease (increase) in fuel oil stock									2,126,000	(2,329,000)	(469,000)
Decrease (increase) in materials and supplies									(1,158,000)	886,000	(661,000)
Decrease (increase) in regulatory assets									9,218,000	71,000	(4,007,000)
Increase in regulatory liabilities									(1,558,000)	5,380,000	315,000
Increase (decrease) in accounts payable									(3,160,000)	6,104,000	(3,547,000)
Change in prepaid and accrued income taxes, tax credits and revenue taxes									(893,000)	(2,118,000)	7,961,000
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability									(762,000)	(760,000)	52,000
Changes in other assets and liabilities									(6,152,000)	2,806,000	(748,000)
Net cash provided by operating activities									65,121,000	73,349,000	62,637,000
Cash flows from investing activities
Capital expenditures									(49,811,000)	(51,054,000)	(47,784,000)
Advances from (to) affiliates									(8,000,000)	0	3,500,000
Other, net									297,000	1,182,000	649,000
Net cash used in investing activities									(57,514,000)	(49,872,000)	(43,635,000)
Cash flows from financing activities
Common stock dividends									(17,680,000)	(15,289,000)	(24,796,000)
Preferred stock dividends of Hawaiian Electric and subsidiaries									(534,000)	(534,000)	(534,000)
Net proceeds from issuance of common stock									0	0
Proceeds from issuance of long-term debt									72,500,000	15,000,000	28,000,000
Repayment of long-term debt and funds transferred for repayment of long-term debt									(70,000,000)	(11,000,000)	(28,000,000)
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less									0	0	0
Proceeds from issuance of short-term debt										0
Net increase in other bank borrowings with original maturities of three months or less									0
Repayment of short-term debt									0
Other									(508,000)	(56,000)	(396,000)
Net cash used in financing activities									(16,222,000)	(11,879,000)	(25,726,000)
Net decrease in cash and equivalents									(8,615,000)	11,598,000	(6,724,000)
Cash, cash equivalents and restricted cash, January 1				15,623,000				4,025,000	15,623,000	4,025,000	10,749,000
Cash, cash equivalents and restricted cash, December 31	7,008,000				15,623,000				7,008,000	15,623,000	4,025,000
Less: Restricted cash	(123,000)								(123,000)
Cash and cash equivalents	6,885,000				15,623,000				6,885,000	15,623,000
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Maui Electric
Cash flows from operating activities
Net income (loss)									22,731,000	21,293,000	18,292,000
Adjustments to reconcile net income to net cash provided by operating activities
Equity in earnings									0	0	0
Common stock dividends received from subsidiaries									0	0	0
Depreciation of property, plant and equipment									30,449,000	25,981,000	23,154,000
Other amortization									1,470,000	577,000	2,875,000
Deferred income taxes									(354,000)	2,165,000	8,004,000
Income tax credits, net									(5,000)	(2,000)	(1,000)
State refundable credit									(1,565,000)	(751,000)	(341,000)
Allowance for equity funds used during construction									(1,216,000)	(1,191,000)	(1,033,000)
Other									(50,000)	429,000	0
Changes in assets and liabilities
Decrease (increase) in accounts receivable									3,469,000	(8,614,000)	45,000
Decrease (increase) in accrued unbilled revenues									(381,000)	(2,689,000)	(1,630,000)
Decrease (increase) in fuel oil stock									613,000	(1,443,000)	(2,241,000)
Decrease (increase) in materials and supplies									245,000	273,000	(1,660,000)
Decrease (increase) in regulatory assets									6,550,000	(3,011,000)	(4,854,000)
Increase in regulatory liabilities									3,409,000	5,438,000	735,000
Increase (decrease) in accounts payable									(3,578,000)	3,506,000	5,762,000
Change in prepaid and accrued income taxes, tax credits and revenue taxes									(3,097,000)	3,047,000	5,362,000
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability									(653,000)	2,328,000	(157,000)
Changes in other assets and liabilities									(6,940,000)	2,356,000	(569,000)
Net cash provided by operating activities									51,097,000	49,692,000	51,743,000
Cash flows from investing activities
Capital expenditures									(58,549,000)	(58,507,000)	(47,329,000)
Advances from (to) affiliates									0	12,000,000	(2,000,000)
Other, net									1,303,000	3,843,000	400,000
Net cash used in investing activities									(57,246,000)	(42,664,000)	(48,929,000)
Cash flows from financing activities
Common stock dividends									(15,068,000)	(12,019,000)	(11,946,000)
Preferred stock dividends of Hawaiian Electric and subsidiaries									(381,000)	(381,000)	(381,000)
Net proceeds from issuance of common stock									4,900,000	1,500,000	4,800,000
Proceeds from issuance of long-term debt									17,500,000	10,000,000	85,000,000
Repayment of long-term debt and funds transferred for repayment of long-term debt									(30,000,000)	(9,000,000)	(75,000,000)
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less									27,700,000	0	0
Proceeds from issuance of short-term debt										0
Net increase in other bank borrowings with original maturities of three months or less									0
Repayment of short-term debt									0
Other									(126,000)	(39,000)	(1,003,000)
Net cash used in financing activities									4,525,000	(9,939,000)	1,470,000
Net decrease in cash and equivalents									(1,624,000)	(2,911,000)	4,284,000
Cash, cash equivalents and restricted cash, January 1				3,421,000				6,332,000	3,421,000	6,332,000	2,048,000
Cash, cash equivalents and restricted cash, December 31	1,797,000				3,421,000				1,797,000	3,421,000	6,332,000
Less: Restricted cash	0								0
Cash and cash equivalents	1,797,000				3,421,000				1,797,000	3,421,000
Hawaiian Electric Company, Inc. and Subsidiaries | Reportable Legal Entities | Other subsidiaries
Cash flows from operating activities
Net income (loss)									0	0	0
Adjustments to reconcile net income to net cash provided by operating activities
Equity in earnings									0	0	0
Common stock dividends received from subsidiaries									0	0	0
Depreciation of property, plant and equipment									0	0	0
Other amortization									0	0	0
Deferred income taxes									0	0	0
Income tax credits, net									0	0	0
State refundable credit									0	0	0
Allowance for equity funds used during construction									0	0	0
Other									0	0	0
Changes in assets and liabilities
Decrease (increase) in accounts receivable									0	0	0
Decrease (increase) in accrued unbilled revenues									0	0	0
Decrease (increase) in fuel oil stock									0	0	0
Decrease (increase) in materials and supplies									0	0	0
Decrease (increase) in regulatory assets									0	0	0
Increase in regulatory liabilities										0	0
Increase (decrease) in accounts payable									0	0	0
Change in prepaid and accrued income taxes, tax credits and revenue taxes									0	0	0
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability									0	0	0
Changes in other assets and liabilities									0	0	0
Net cash provided by operating activities									0	0	0
Cash flows from investing activities
Capital expenditures									0	0	0
Advances from (to) affiliates									0	0	0
Other, net									0	0	0
Net cash used in investing activities									0	0	0
Cash flows from financing activities
Common stock dividends									0	0	0
Preferred stock dividends of Hawaiian Electric and subsidiaries									0	0	0
Net proceeds from issuance of common stock									0	0	0
Proceeds from issuance of long-term debt									0	0	0
Repayment of long-term debt and funds transferred for repayment of long-term debt									0	0	0
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less									0	0	0
Proceeds from issuance of short-term debt										0
Net increase in other bank borrowings with original maturities of three months or less									0
Repayment of short-term debt									0
Other									0	0	0
Net cash used in financing activities									0	0	0
Net decrease in cash and equivalents									0	0	0
Cash, cash equivalents and restricted cash, January 1				101,000				101,000	101,000	101,000	101,000
Cash, cash equivalents and restricted cash, December 31	101,000				101,000				101,000	101,000	101,000
Less: Restricted cash	0								0
Cash and cash equivalents	101,000				101,000				101,000	101,000
Hawaiian Electric Company, Inc. and Subsidiaries | Consolidating Adjustments
Cash flows from operating activities
Net income (loss)									(43,167,000)	(45,393,000)	(38,057,000)
Adjustments to reconcile net income to net cash provided by operating activities
Equity in earnings									43,167,000	45,393,000	38,057,000
Common stock dividends received from subsidiaries									(32,748,000)	(27,308,000)	(36,742,000)
Depreciation of property, plant and equipment									0	0	0
Other amortization									0	0	0
Deferred income taxes									0	0	(263,000)
Income tax credits, net									0	0	0
State refundable credit									0	0	0
Allowance for equity funds used during construction									0	0	0
Other									0	0	0
Changes in assets and liabilities
Decrease (increase) in accounts receivable									(11,215,000)	14,220,000	1,411,000
Decrease (increase) in accrued unbilled revenues									0	0	0
Decrease (increase) in fuel oil stock									0	0	0
Decrease (increase) in materials and supplies									0	0	0
Decrease (increase) in regulatory assets									0	0	0
Increase in regulatory liabilities										0	0
Increase (decrease) in accounts payable									0	0	0
Change in prepaid and accrued income taxes, tax credits and revenue taxes									367,000	(331,000)	(177,000)
Increase (decrease) in defined benefit pension and other postretirement benefit plans liability									0	0	0
Changes in other assets and liabilities									11,215,000	(14,220,000)	(1,411,000)
Net cash provided by operating activities									(32,381,000)	(27,639,000)	(37,182,000)
Cash flows from investing activities
Capital expenditures									0	0	0
Advances from (to) affiliates									35,700,000	(12,000,000)	(1,500,000)
Other, net									4,533,000	1,831,000	5,240,000
Net cash used in investing activities									40,233,000	(10,169,000)	3,740,000
Cash flows from financing activities
Common stock dividends									32,748,000	27,308,000	36,742,000
Preferred stock dividends of Hawaiian Electric and subsidiaries									0	0	0
Net proceeds from issuance of common stock									(4,900,000)	(1,500,000)	(4,800,000)
Proceeds from issuance of long-term debt									0	0	0
Repayment of long-term debt and funds transferred for repayment of long-term debt									0	0	0
Net increase (decrease) in short-term borrowings from non-affiliates and affiliate with original maturities of three months or less									(35,700,000)	12,000,000	1,500,000
Proceeds from issuance of short-term debt										0
Net increase in other bank borrowings with original maturities of three months or less									0
Repayment of short-term debt									0
Other									0	0	0
Net cash used in financing activities									(7,852,000)	37,808,000	33,442,000
Net decrease in cash and equivalents									0	0	0
Cash, cash equivalents and restricted cash, January 1				$ 0				$ 0	0	0	0
Cash, cash equivalents and restricted cash, December 31	0				0				0	0	$ 0
Less: Restricted cash	0								0
Cash and cash equivalents	$ 0				$ 0				$ 0	$ 0

Bank segment (HEI only) - State

Bank segment (HEI only) - Statements of Income Data (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest expense
Interest on deposit liabilities	$ 16,830	$ 13,991	$ 9,660
Total interest expense	109,339	104,216	91,128
Noninterest income
Revenues	2,622,025	2,614,831
Noninterest expense
Income before income taxes	271,409	254,461	276,580
Income taxes	51,637	50,797	109,393
Current period other comprehensive income (loss) and reclassifications, net of taxes	30,571	(8,669)	(1,372)
Comprehensive income	248,453	193,105	163,925
American Savings Bank (ASB)
Interest and dividend income
Interest and fees on loans	233,632	220,463	207,255
Interest and dividends on investment securities	32,922	37,762	28,823
Total interest and dividend income	266,554	258,225	236,078
Interest expense
Interest on deposit liabilities	16,830	13,991	9,660
Interest on other borrowings	1,610	1,548	2,496
Total interest expense	18,440	15,539	12,156
Net interest income	248,114	242,686	223,922
Provision for loan losses	23,480	14,745	10,901
Net interest income after provision for loan losses	224,634	227,941	213,021
Noninterest income
Gain on sale of properties	10,762	0	0
Gains on sale of investment securities, net	653	0	0
Total noninterest income	72,778	56,050	61,562
Noninterest expense
Compensation and employee benefits	103,009	98,387	94,931
Occupancy	21,272	17,073	16,699
Data processing	15,306	14,268	13,280
Services	10,239	10,847	10,994
Equipment	8,760	7,186	7,232
Office supplies, printing and postage	5,512	6,134	6,182
Marketing	4,490	3,567	3,501
FDIC insurance	1,204	2,713	2,904
Other expense	15,586	17,238	20,144
Total noninterest expense	185,378	177,413	175,867
Income before income taxes	112,034	106,578	98,716
Income taxes	23,061	24,069	31,719
Net income attributable to Hawaiian Electric	88,973	82,509	66,997
Current period other comprehensive income (loss) and reclassifications, net of taxes	29,406	(7,119)	(3,139)
Comprehensive income	118,379	75,390	63,858
American Savings Bank (ASB) | Fees from other financial services
Noninterest income
Revenues	19,275	18,937	22,796
American Savings Bank (ASB) | Fee income on deposit liabilities
Noninterest income
Revenues	20,877	21,311	22,204
American Savings Bank (ASB) | Fee income on other financial products
Noninterest income
Revenues	6,507	7,052	7,205
American Savings Bank (ASB) | Bank-owned life insurance
Noninterest income
Revenues	7,687	5,057	5,539
American Savings Bank (ASB) | Mortgage banking income
Noninterest income
Revenues	4,943	1,493	2,201
American Savings Bank (ASB) | Other income, net
Noninterest income
Revenues	$ 2,074	$ 2,200	$ 1,617

Bank segment (HEI only) - Recon

Bank segment (HEI only) - Reconciliation of Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Revenues	$ 725,966	$ 771,535	$ 715,485	$ 661,615	$ 761,650	$ 768,048	$ 685,277	$ 645,874	$ 2,874,601	$ 2,860,849	$ 2,555,625
Total interest expense									109,339	104,216	91,128
Less: Retirement defined benefits credit (expense)—other than service costs									(2,806)	(5,962)	(7,942)
Total expenses									2,525,927	2,527,493	2,209,392
Operating income	$ 100,795	$ 97,308	$ 72,634	$ 77,937	$ 84,604	$ 98,064	$ 78,799	$ 71,889	348,674	333,356	346,233
Add back: Retirement defined benefits expense (credit)—other than service costs									2,806	5,962	7,942
Income before income taxes									271,409	254,461	276,580
American Savings Bank (ASB)
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Interest and dividend income									266,554	258,225	236,078
Noninterest income									72,778	56,050	61,562
Less: Gain on sale of real estate									(10,762)	0	0
Revenues									328,570	314,275	297,640
Total interest expense									18,440	15,539	12,156
Provision for loan losses									23,480	14,745	10,901
Noninterest expense									185,378	177,413	175,867
Less: Retirement defined benefits credit (expense)—other than service costs									472	(1,657)	(820)
Add: Gain on sale of real estate									(10,762)	0	0
Total expenses									217,008	206,040	198,104
Operating income									111,562	108,235	99,536
Add back: Retirement defined benefits expense (credit)—other than service costs									(472)	1,657	820
Income before income taxes									$ 112,034	$ 106,578	$ 98,716

Bank segment (HEI only) - Balan

Bank segment (HEI only) - Balance Sheets Data (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)building	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Assets
Cash and due from banks	$ 196,813	$ 169,208
Investment securities
Available-for-sale, at fair value	1,232,826	1,388,533
Held-to-maturity, at amortized cost (fair value of $143,467 and $142,057 at December 31, 2019 and 2018, respectively)	139,451	141,875
Stock in Federal Home Loan Bank, at cost	8,434	9,958
Allowance for loan losses	(53,355)	(52,119)
Total loans, net	5,067,821	4,790,902
Loans held for sale, at lower of cost or fair value	12,286	1,805
Other	649,885	530,364
Goodwill	82,190	82,190
Total assets	13,745,251	13,104,051	$ 12,534,160
LIABILITIES AND SHAREHOLDERS’ EQUITY
Other	583,545	580,788
Total liabilities	11,430,698	10,907,478
Commitments and contingencies
Retained earnings	622,042	543,623
Net unrealized gains (losses) on securities	2,481	(24,423)
Accumulated other comprehensive loss, net of tax benefits	(20,039)	(50,610)
Total shareholders’ equity	2,280,260	2,162,280	$ 2,097,386	$ 2,066,753
Total capitalization and liabilities	13,745,251	13,104,051
Other assets
Premises and equipment, net	5,109,628	4,830,118
Total other assets	649,885	530,364
Other liabilities
Total other liabilities	583,545	580,788
Held-to-maturity investment securities	$ 143,467	142,057
Number of buildings sold | building	2
American Savings Bank (ASB)
Assets
Cash and due from banks	$ 129,770	122,059
Interest-bearing deposits	48,628	4,225
Investment securities
Available-for-sale, at fair value	1,232,826	1,388,533
Held-to-maturity, at amortized cost (fair value of $143,467 and $142,057 at December 31, 2019 and 2018, respectively)	139,451	141,875
Stock in Federal Home Loan Bank, at cost	8,434	9,958
Loans held for investment	5,121,176	4,843,021
Allowance for loan losses	(53,355)	(52,119)
Total loans, net	5,067,821	4,790,902
Loans held for sale, at lower of cost or fair value	12,286	1,805
Other	511,611	486,347
Goodwill	82,190	82,190
Total assets	7,233,017	7,027,894
LIABILITIES AND SHAREHOLDERS’ EQUITY
Deposit liabilities–noninterest-bearing	1,909,682	1,800,727
Deposit liabilities–interest-bearing	4,362,220	4,358,125
Other borrowings	115,110	110,040
Other	146,954	124,613
Total liabilities	6,533,966	6,393,505
Commitments and contingencies
Common stock	1	1
Additional paid in capital	349,453	347,170
Retained earnings	358,259	325,286
Net unrealized gains (losses) on securities	2,481	(24,423)
Retirement benefit plans	(11,143)	(13,645)
Accumulated other comprehensive loss, net of tax benefits	(8,662)	(38,068)
Total shareholders’ equity	699,051	634,389
Total capitalization and liabilities	7,233,017	7,027,894
Other assets
Bank-owned life insurance	157,465	151,172
Premises and equipment, net	204,449	214,415
Accrued interest receivable	19,365	20,140
Mortgage servicing rights	9,101	8,062
Low-income housing investments	66,302	67,626
Real estate acquired in settlement of loans, net	0	406
Other	54,929	24,526
Total other assets	511,611	486,347
Other liabilities
Accrued expenses	45,822	54,084
Federal and state income taxes payable	14,996	2,012
Cashier’s checks	23,647	26,906
Advance payments by borrowers	10,486	10,183
Other	52,003	31,428
Total other liabilities	146,954	124,613
Held-to-maturity investment securities	$ 143,467	$ 142,057

Bank segment (HEI only) - Avail

Bank segment (HEI only) - Available For Sale Investment Securities (Details) $ in Thousands	Dec. 31, 2019USD ($)issue	Dec. 31, 2018USD ($)issue
Available-for-sale
Total amortized cost	$ 1,229,438	$ 1,421,897
Gross unrealized gains	8,015	954
Gross unrealized losses	(4,627)	(34,318)
Available-for-sale investment securities	$ 1,232,826	$ 1,388,533
Number of issues, less than 12 months | issue	21	33
Fair value, less than 12 months	$ 156,181	$ 178,068
Gross unrealized losses, less than 12 months	$ (830)	$ (1,907)
Number of issues, more than 12 months | issue	78	164
Fair value, 12 months or longer	$ 345,657	$ 1,066,295
Gross unrealized losses, 12 months or longer	(3,797)	(32,411)
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Debt Securities, Held-to-maturity	139,451	141,875
Gross unrealized gains	4,087	1,446
Gross unrealized losses	(71)	(1,264)
Held-to-maturity investment securities	$ 143,467	$ 142,057
Number of issues, less than 12 months | issue	1	3
Fair value, less than 12 months	$ 12,986	$ 29,814
Gross unrealized losses, less than 12 months	$ (71)	$ (400)
Number of issues, more than 12 months | issue	0	2
Fair value, 12 months or longer	$ 0	$ 31,505
Gross unrealized losses, 12 months or longer	0	(864)
U.S. Treasury and federal agency obligations
Available-for-sale
Total amortized cost	117,255	156,694
Gross unrealized gains	652	62
Gross unrealized losses	(120)	(2,407)
Available-for-sale investment securities	$ 117,787	$ 154,349
Number of issues, less than 12 months | issue	2	5
Fair value, less than 12 months	$ 4,110	$ 25,882
Gross unrealized losses, less than 12 months	$ (11)	$ (208)
Number of issues, more than 12 months | issue	3	19
Fair value, 12 months or longer	$ 27,637	$ 118,405
Gross unrealized losses, 12 months or longer	(109)	(2,199)
Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies
Available-for-sale
Total amortized cost	1,024,892	1,192,169
Gross unrealized gains	6,000	789
Gross unrealized losses	(4,507)	(31,542)
Available-for-sale investment securities	$ 1,026,385	$ 1,161,416
Number of issues, less than 12 months | issue	19	22
Fair value, less than 12 months	$ 152,071	$ 129,011
Gross unrealized losses, less than 12 months	$ (819)	$ (1,330)
Number of issues, more than 12 months | issue	75	145
Fair value, 12 months or longer	$ 318,020	$ 947,890
Gross unrealized losses, 12 months or longer	(3,688)	(30,212)
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Debt Securities, Held-to-maturity	139,451	141,875
Gross unrealized gains	4,087	1,446
Gross unrealized losses	(71)	(1,264)
Held-to-maturity investment securities	$ 143,467	$ 142,057
Number of issues, less than 12 months | issue	1	3
Fair value, less than 12 months	$ 12,986	$ 29,814
Gross unrealized losses, less than 12 months	$ (71)	$ (400)
Number of issues, more than 12 months | issue	0	2
Fair value, 12 months or longer	$ 0	$ 31,505
Gross unrealized losses, 12 months or longer	0	(864)
Corporate bonds
Available-for-sale
Total amortized cost	58,694	49,398
Gross unrealized gains	1,363	103
Gross unrealized losses	0	(369)
Available-for-sale investment securities	$ 60,057	$ 49,132
Number of issues, less than 12 months | issue	0	6
Fair value, less than 12 months	$ 0	$ 23,175
Gross unrealized losses, less than 12 months	$ 0	$ (369)
Number of issues, more than 12 months | issue	0	0
Fair value, 12 months or longer	$ 0	$ 0
Gross unrealized losses, 12 months or longer	0	0
Mortgage revenue bonds
Available-for-sale
Total amortized cost	28,597	23,636
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Available-for-sale investment securities	$ 28,597	$ 23,636
Number of issues, less than 12 months | issue	0	0
Fair value, less than 12 months	$ 0	$ 0
Gross unrealized losses, less than 12 months	$ 0	$ 0
Number of issues, more than 12 months | issue	0	0
Fair value, 12 months or longer	$ 0	$ 0
Gross unrealized losses, 12 months or longer	0	0
American Savings Bank (ASB)
Available-for-sale
Available-for-sale investment securities	1,232,826	1,388,533
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Debt Securities, Held-to-maturity	139,451	141,875
Held-to-maturity investment securities	$ 143,467	$ 142,057

Bank segment (HEI only) - Inves

Bank segment (HEI only) - Investment Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Amortized Cost
Due in one year or less	$ 60,200
Due after one year through five years	75,694
Due after five years through ten years	53,225
Due after ten years	15,427
Amortized cost, available-for-sale securities with a single maturity date	204,546
Mortgage-related securities-FNMA, FHLMC and GNMA - amortized cost	1,024,892
Total amortized cost	1,229,438	$ 1,421,897
Mortgage-related securities-FNMA, FHLMC and GNMA, amortized cost basis	139,451
Debt Securities, Held-to-maturity	139,451	141,875
Fair value
Due in one year or less	60,249
Due after one year through five years	77,225
Due after five years through ten years	53,540
Due after ten years	15,427
Available-for-sale securities with a single maturity date	206,441
Mortgage-related securities-FNMA, FHLMC and GNMA - fair value	1,026,385
Total fair value	1,232,826	1,388,533
Mortgage-related securities - FNMA, FHLMC and GNMA, Fair Value	143,467
Held-to-maturity securities, Fair Value	143,467	142,057
Gains (losses) from sales of available-for-sale investments
Proceeds	19,810	0	$ 0
Gross gains	700	0	0
Gross losses	0	0	0
Interest income from taxable and non-taxable investment securities
Taxable	31,847	37,153	28,398
Non-taxable	1,074	609	425
Total	32,921	37,762	$ 28,823
Available-for-sale securities pledged at carrying value	546,000	546,000
Available-for-sale securities, pledged at carrying value as collateral for securities sold under agreements to repurchase	130,000	92,000
Stock in federal home loan bank at cost	8,434	9,958
FHLB Des Moines
Interest income from taxable and non-taxable investment securities
Stock in federal home loan bank at cost	$ 8,400	$ 10,000

Bank segment (HEI only) - Loans

Bank segment (HEI only) - Loans Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Loans receivable
Loans Receivable	$ 5,120,664	$ 4,843,634
Less: Deferred fees and discounts	512	(613)
Allowance for loan losses	(53,355)	(52,119)
Total loans, net	5,067,821	4,790,902
Real estate loans
Loans receivable
Loans Receivable	4,192,069	3,989,741
Residential 1-4 family
Loans receivable
Loans Receivable	2,178,135	2,143,397
Commercial real estate
Loans receivable
Loans Receivable	824,830	748,398
Home equity line of credit
Loans receivable
Loans Receivable	1,092,125	978,237
Residential land
Loans receivable
Loans Receivable	14,704	13,138
Commercial construction
Loans receivable
Loans Receivable	70,605	92,264
Residential construction
Loans receivable
Loans Receivable	11,670	14,307
Commercial
Loans receivable
Loans Receivable	670,674	587,891
Consumer
Loans receivable
Loans Receivable	$ 257,921	$ 266,002

Bank segment (HEI only) - Loa_2

Bank segment (HEI only) - Loans Receivable, Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Bank Segment Disclosure [Abstract]
Percentage of benchmark loan to appraisal ratio in excess of which mortgage insurance is required	80.00%
Minimum benchmark percentage of loan to non-owner occupied residential property purchase	75.00%
Real estate loans for investors	$ 1,300	$ 1,200	$ 1,200
Loans pledged as collateral to secure advances from the FHLB of Des Moines	2,900	2,700
Loans to directors, executive directors, affiliates and any related interest of such individuals	24.1	24
Loan balances, related interests of individuals who are directors	$ 18	$ 18.3

Bank segment (HEI only) - Allow

Bank segment (HEI only) - Allowance For Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	$ 52,119	$ 53,637	$ 55,533
Charge-offs	(28,662)	(20,517)	(16,813)
Recoveries	6,418	4,254	4,016
Provision	23,480	14,745	10,901
Valuation allowance, balance at the end of the period	53,355	52,119	53,637
Ending balance: individually evaluated for impairment	2,691	2,222	2,730
Ending balance: collectively evaluated for impairment	50,664	49,897	50,907
Financing Receivables:
Total financing receivables	5,120,664	4,843,634	4,671,577
Ending balance: individually evaluated for impairment	40,737	39,697	33,393
Ending balance: collectively evaluated for impairment	5,079,927	4,803,937	4,638,184
Residential 1-4 family
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	1,976	2,902	2,873
Charge-offs	(26)	(128)	(826)
Recoveries	854	74	157
Provision	(424)	(872)	698
Valuation allowance, balance at the end of the period	2,380	1,976	2,902
Ending balance: individually evaluated for impairment	898	876	1,248
Ending balance: collectively evaluated for impairment	1,482	1,100	1,654
Financing Receivables:
Total financing receivables	2,178,135	2,143,397	2,118,047
Ending balance: individually evaluated for impairment	15,600	16,494	18,284
Ending balance: collectively evaluated for impairment	2,162,535	2,126,903	2,099,763
Commercial real estate
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	14,505	15,796	16,004
Charge-offs	0	0	0
Recoveries	0	0	0
Provision	548	(1,291)	(208)
Valuation allowance, balance at the end of the period	15,053	14,505	15,796
Ending balance: individually evaluated for impairment	2	7	65
Ending balance: collectively evaluated for impairment	15,051	14,498	15,731
Financing Receivables:
Total financing receivables	824,830	748,398	733,106
Ending balance: individually evaluated for impairment	1,048	915	1,016
Ending balance: collectively evaluated for impairment	823,782	747,483	732,090
Home equity line of credit
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	6,371	7,522	5,039
Charge-offs	(144)	(353)	(14)
Recoveries	17	257	308
Provision	678	(1,055)	2,189
Valuation allowance, balance at the end of the period	6,922	6,371	7,522
Ending balance: individually evaluated for impairment	322	701	647
Ending balance: collectively evaluated for impairment	6,600	5,670	6,875
Financing Receivables:
Total financing receivables	1,092,125	978,237	913,052
Ending balance: individually evaluated for impairment	12,073	14,800	8,188
Ending balance: collectively evaluated for impairment	1,080,052	963,437	904,864
Residential land
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	479	896	1,738
Charge-offs	(4)	(18)	(210)
Recoveries	229	179	482
Provision	(255)	(578)	(1,114)
Valuation allowance, balance at the end of the period	449	479	896
Ending balance: individually evaluated for impairment	0	6	47
Ending balance: collectively evaluated for impairment	449	473	849
Financing Receivables:
Total financing receivables	14,704	13,138	15,797
Ending balance: individually evaluated for impairment	3,091	2,059	1,265
Ending balance: collectively evaluated for impairment	11,613	11,079	14,532
Commercial construction
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	2,790	4,671	6,449
Charge-offs	0	0	0
Recoveries	0	0	0
Provision	(693)	(1,881)	(1,778)
Valuation allowance, balance at the end of the period	2,097	2,790	4,671
Ending balance: individually evaluated for impairment	0	0	0
Ending balance: collectively evaluated for impairment	2,097	2,790	4,671
Financing Receivables:
Total financing receivables	70,605	92,264	108,273
Ending balance: individually evaluated for impairment	0	0	0
Ending balance: collectively evaluated for impairment	70,605	92,264	108,273
Residential construction
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	4	12	12
Charge-offs	0	0	0
Recoveries	0	0	0
Provision	(1)	(8)	0
Valuation allowance, balance at the end of the period	3	4	12
Ending balance: individually evaluated for impairment	0	0	0
Ending balance: collectively evaluated for impairment	3	4	12
Financing Receivables:
Total financing receivables	11,670	14,307	14,910
Ending balance: individually evaluated for impairment	0	0	0
Ending balance: collectively evaluated for impairment	11,670	14,307	14,910
Commercial
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	9,225	10,851	16,618
Charge-offs	(6,811)	(2,722)	(4,006)
Recoveries	2,351	2,136	1,852
Provision	5,480	(1,040)	(3,613)
Valuation allowance, balance at the end of the period	10,245	9,225	10,851
Ending balance: individually evaluated for impairment	1,015	628	694
Ending balance: collectively evaluated for impairment	9,230	8,597	10,157
Financing Receivables:
Total financing receivables	670,674	587,891	544,828
Ending balance: individually evaluated for impairment	8,418	5,340	4,574
Ending balance: collectively evaluated for impairment	662,256	582,551	540,254
Consumer
Allowance for loan losses:
Valuation allowance, balance at the beginning of the period	16,769	10,987	6,800
Charge-offs	(21,677)	(17,296)	(11,757)
Recoveries	2,967	1,608	1,217
Provision	18,147	21,470	14,727
Valuation allowance, balance at the end of the period	16,206	16,769	10,987
Ending balance: individually evaluated for impairment	454	4	29
Ending balance: collectively evaluated for impairment	15,752	16,765	10,958
Financing Receivables:
Total financing receivables	257,921	266,002	223,564
Ending balance: individually evaluated for impairment	507	89	66
Ending balance: collectively evaluated for impairment	$ 257,414	$ 265,913	$ 223,498

Bank segment (HEI only) - Credi

Bank segment (HEI only) - Credit Risk Profile by Internally Assigned Grade for Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Credit risk profile by internally assigned grade for loans
Total financing receivables	$ 5,120,664	$ 4,843,634	$ 4,671,577
Loans, Excluding Consumer Loans
Credit risk profile by internally assigned grade for loans
Total financing receivables	1,566,109	1,428,553
Loans, Excluding Consumer Loans | Pass
Credit risk profile by internally assigned grade for loans
Total financing receivables	1,446,720	1,295,902
Loans, Excluding Consumer Loans | Special mention
Credit risk profile by internally assigned grade for loans
Total financing receivables	34,372	44,469
Loans, Excluding Consumer Loans | Substandard
Credit risk profile by internally assigned grade for loans
Total financing receivables	85,017	88,182
Loans, Excluding Consumer Loans | Doubtful
Credit risk profile by internally assigned grade for loans
Total financing receivables	0	0
Loans, Excluding Consumer Loans | Loss
Credit risk profile by internally assigned grade for loans
Total financing receivables	0	0
Commercial real estate
Credit risk profile by internally assigned grade for loans
Total financing receivables	824,830	748,398	733,106
Commercial real estate | Pass
Credit risk profile by internally assigned grade for loans
Total financing receivables	756,747	658,288
Commercial real estate | Special mention
Credit risk profile by internally assigned grade for loans
Total financing receivables	4,451	32,871
Commercial real estate | Substandard
Credit risk profile by internally assigned grade for loans
Total financing receivables	63,632	57,239
Commercial real estate | Doubtful
Credit risk profile by internally assigned grade for loans
Total financing receivables	0	0
Commercial real estate | Loss
Credit risk profile by internally assigned grade for loans
Total financing receivables	0	0
Commercial construction
Credit risk profile by internally assigned grade for loans
Total financing receivables	70,605	92,264	108,273
Commercial construction | Pass
Credit risk profile by internally assigned grade for loans
Total financing receivables	68,316	89,974
Commercial construction | Special mention
Credit risk profile by internally assigned grade for loans
Total financing receivables	0	0
Commercial construction | Substandard
Credit risk profile by internally assigned grade for loans
Total financing receivables	2,289	2,290
Commercial construction | Doubtful
Credit risk profile by internally assigned grade for loans
Total financing receivables	0	0
Commercial construction | Loss
Credit risk profile by internally assigned grade for loans
Total financing receivables	0	0
Commercial
Credit risk profile by internally assigned grade for loans
Total financing receivables	670,674	587,891	$ 544,828
Commercial | Pass
Credit risk profile by internally assigned grade for loans
Total financing receivables	621,657	547,640
Commercial | Special mention
Credit risk profile by internally assigned grade for loans
Total financing receivables	29,921	11,598
Commercial | Substandard
Credit risk profile by internally assigned grade for loans
Total financing receivables	19,096	28,653
Commercial | Doubtful
Credit risk profile by internally assigned grade for loans
Total financing receivables	0	0
Commercial | Loss
Credit risk profile by internally assigned grade for loans
Total financing receivables	$ 0	$ 0

Bank segment (HEI only) - Cre_2

Bank segment (HEI only) - Credit Risk Profile Based on Payment Activity for Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Credit risk profile based on payment activity for loans
Total past due	$ 19,751	$ 25,969
Current	5,100,913	4,817,665
Total financing receivables	5,120,664	4,843,634	$ 4,671,577
Recorded Investment greater than 90 days and accruing	0	0
Residential 1-4 family
Credit risk profile based on payment activity for loans
Total past due	4,686	8,869
Current	2,173,449	2,134,528
Total financing receivables	2,178,135	2,143,397	2,118,047
Recorded Investment greater than 90 days and accruing	0	0
Commercial real estate
Credit risk profile based on payment activity for loans
Total past due	0	0
Current	824,830	748,398
Total financing receivables	824,830	748,398	733,106
Recorded Investment greater than 90 days and accruing	0	0
Home equity line of credit
Credit risk profile based on payment activity for loans
Total past due	2,930	4,540
Current	1,089,195	973,697
Total financing receivables	1,092,125	978,237	913,052
Recorded Investment greater than 90 days and accruing	0	0
Residential land
Credit risk profile based on payment activity for loans
Total past due	25	328
Current	14,679	12,810
Total financing receivables	14,704	13,138	15,797
Recorded Investment greater than 90 days and accruing	0	0
Commercial construction
Credit risk profile based on payment activity for loans
Total past due	0	0
Current	70,605	92,264
Total financing receivables	70,605	92,264	108,273
Recorded Investment greater than 90 days and accruing	0	0
Residential construction
Credit risk profile based on payment activity for loans
Total past due	0	0
Current	11,670	14,307
Total financing receivables	11,670	14,307	14,910
Recorded Investment greater than 90 days and accruing	0	0
Commercial
Credit risk profile based on payment activity for loans
Total past due	1,560	1,144
Current	669,114	586,747
Total financing receivables	670,674	587,891	544,828
Recorded Investment greater than 90 days and accruing	0	0
Consumer
Credit risk profile based on payment activity for loans
Total past due	10,550	11,088
Current	247,371	254,914
Total financing receivables	257,921	266,002	$ 223,564
Recorded Investment greater than 90 days and accruing	0	0
30-59 days past due
Credit risk profile based on payment activity for loans
Total past due	8,864	10,440
30-59 days past due | Residential 1-4 family
Credit risk profile based on payment activity for loans
Total past due	2,588	3,757
30-59 days past due | Commercial real estate
Credit risk profile based on payment activity for loans
Total past due	0	0
30-59 days past due | Home equity line of credit
Credit risk profile based on payment activity for loans
Total past due	813	1,139
30-59 days past due | Residential land
Credit risk profile based on payment activity for loans
Total past due	0	9
30-59 days past due | Commercial construction
Credit risk profile based on payment activity for loans
Total past due	0	0
30-59 days past due | Residential construction
Credit risk profile based on payment activity for loans
Total past due	0	0
30-59 days past due | Commercial
Credit risk profile based on payment activity for loans
Total past due	1,077	315
30-59 days past due | Consumer
Credit risk profile based on payment activity for loans
Total past due	4,386	5,220
60-89 days past due
Credit risk profile based on payment activity for loans
Total past due	3,858	6,901
60-89 days past due | Residential 1-4 family
Credit risk profile based on payment activity for loans
Total past due	290	2,773
60-89 days past due | Commercial real estate
Credit risk profile based on payment activity for loans
Total past due	0	0
60-89 days past due | Home equity line of credit
Credit risk profile based on payment activity for loans
Total past due	0	681
60-89 days past due | Residential land
Credit risk profile based on payment activity for loans
Total past due	0	0
60-89 days past due | Commercial construction
Credit risk profile based on payment activity for loans
Total past due	0	0
60-89 days past due | Residential construction
Credit risk profile based on payment activity for loans
Total past due	0	0
60-89 days past due | Commercial
Credit risk profile based on payment activity for loans
Total past due	311	281
60-89 days past due | Consumer
Credit risk profile based on payment activity for loans
Total past due	3,257	3,166
Greater than 90 days
Credit risk profile based on payment activity for loans
Total past due	7,029	8,628
Greater than 90 days | Residential 1-4 family
Credit risk profile based on payment activity for loans
Total past due	1,808	2,339
Greater than 90 days | Commercial real estate
Credit risk profile based on payment activity for loans
Total past due	0	0
Greater than 90 days | Home equity line of credit
Credit risk profile based on payment activity for loans
Total past due	2,117	2,720
Greater than 90 days | Residential land
Credit risk profile based on payment activity for loans
Total past due	25	319
Greater than 90 days | Commercial construction
Credit risk profile based on payment activity for loans
Total past due	0	0
Greater than 90 days | Residential construction
Credit risk profile based on payment activity for loans
Total past due	0	0
Greater than 90 days | Commercial
Credit risk profile based on payment activity for loans
Total past due	172	548
Greater than 90 days | Consumer
Credit risk profile based on payment activity for loans
Total past due	$ 2,907	$ 2,702

Bank segment (HEI only) - Cre_3

Bank segment (HEI only) - Credit Risk Profile Based on Aging Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Credit risk profile based on nonaccrual loans
Nonaccrual loans	$ 29,736	$ 27,295
Accruing loans 90 days or more past due	0	0
Troubled debt restructured loans not included above	26,413	25,917
Residential 1-4 family
Credit risk profile based on nonaccrual loans
Nonaccrual loans	11,395	12,037
Accruing loans 90 days or more past due	0	0
Troubled debt restructured loans not included above	9,869	10,194
Commercial real estate
Credit risk profile based on nonaccrual loans
Nonaccrual loans	195	0
Accruing loans 90 days or more past due	0	0
Troubled debt restructured loans not included above	853	915
Home equity line of credit
Credit risk profile based on nonaccrual loans
Nonaccrual loans	6,638	6,348
Accruing loans 90 days or more past due	0	0
Troubled debt restructured loans not included above	10,376	11,597
Residential land
Credit risk profile based on nonaccrual loans
Nonaccrual loans	448	436
Accruing loans 90 days or more past due	0	0
Troubled debt restructured loans not included above	2,644	1,622
Commercial construction
Credit risk profile based on nonaccrual loans
Nonaccrual loans	0	0
Accruing loans 90 days or more past due	0	0
Troubled debt restructured loans not included above	0	0
Residential construction
Credit risk profile based on nonaccrual loans
Nonaccrual loans	0	0
Accruing loans 90 days or more past due	0	0
Troubled debt restructured loans not included above	0	0
Commercial
Credit risk profile based on nonaccrual loans
Nonaccrual loans	5,947	4,278
Accruing loans 90 days or more past due	0	0
Troubled debt restructured loans not included above	2,614	1,527
Consumer
Credit risk profile based on nonaccrual loans
Nonaccrual loans	5,113	4,196
Accruing loans 90 days or more past due	0	0
Troubled debt restructured loans not included above	$ 57	$ 62

Bank segment (HEI only) - Carry

Bank segment (HEI only) - Carrying Amount of Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Recorded investment:
With no related allowance recorded	$ 14,037	$ 16,349
With an allowance recorded	26,700	23,348
Recorded investment	40,737	39,697
Unpaid principal balance:
With no related allowance recorded	15,123	18,372
With an allowance recorded	26,762	23,580
Unpaid principal balance	41,885	41,952
Related Allowance	2,691	2,222
Average recorded investment, with no related allowance recorded	17,422	15,630	$ 15,378
Average recorded investment, with an allowance recorded	27,972	22,360	21,160
Average recorded investment	45,394	37,990	36,538
Interest income recognized, with no related allowance recorded	1,400	588	599
Interest income recognized, with an allowance recorded	1,119	974	1,621
Interest income recognized	2,519	1,562	2,220
Residential 1-4 family
Recorded investment:
With no related allowance recorded	6,817	7,822
With an allowance recorded	8,783	8,672
Recorded investment	15,600	16,494
Unpaid principal balance:
With no related allowance recorded	7,207	8,333
With an allowance recorded	8,835	8,875
Unpaid principal balance	16,042	17,208
Related Allowance	898	876
Average recorded investment, with no related allowance recorded	8,169	8,595	9,440
Average recorded investment, with an allowance recorded	8,390	8,878	9,818
Average recorded investment	16,559	17,473	19,258
Interest income recognized, with no related allowance recorded	907	445	316
Interest income recognized, with an allowance recorded	359	363	493
Interest income recognized	1,266	808	809
Commercial real estate
Recorded investment:
With no related allowance recorded	195	0
With an allowance recorded	853	915
Recorded investment	1,048	915
Unpaid principal balance:
With no related allowance recorded	200	0
With an allowance recorded	853	915
Unpaid principal balance	1,053	915
Related Allowance	2	7
Average recorded investment, with no related allowance recorded	16	0	91
Average recorded investment, with an allowance recorded	886	982	1,241
Average recorded investment	902	982	1,332
Interest income recognized, with no related allowance recorded	0	0	11
Interest income recognized, with an allowance recorded	37	42	54
Interest income recognized	37	42	65
Home equity line of credit
Recorded investment:
With no related allowance recorded	1,984	2,743
With an allowance recorded	10,089	12,057
Recorded investment	12,073	14,800
Unpaid principal balance:
With no related allowance recorded	2,135	3,004
With an allowance recorded	10,099	12,086
Unpaid principal balance	12,234	15,090
Related Allowance	322	701
Average recorded investment, with no related allowance recorded	2,020	2,206	1,976
Average recorded investment, with an allowance recorded	11,319	10,617	5,045
Average recorded investment	13,339	12,823	7,021
Interest income recognized, with no related allowance recorded	84	75	101
Interest income recognized, with an allowance recorded	567	440	251
Interest income recognized	651	515	352
Residential land
Recorded investment:
With no related allowance recorded	3,091	2,030
With an allowance recorded	0	29
Recorded investment	3,091	2,059
Unpaid principal balance:
With no related allowance recorded	3,294	2,228
With an allowance recorded	0	29
Unpaid principal balance	3,294	2,257
Related Allowance	0	6
Average recorded investment, with no related allowance recorded	2,662	1,532	1,094
Average recorded investment, with an allowance recorded	27	37	1,308
Average recorded investment	2,689	1,569	2,402
Interest income recognized, with no related allowance recorded	129	40	117
Interest income recognized, with an allowance recorded	0	3	97
Interest income recognized	129	43	214
Commercial construction
Recorded investment:
With no related allowance recorded	0	0
With an allowance recorded	0	0
Recorded investment	0	0
Unpaid principal balance:
With no related allowance recorded	0	0
With an allowance recorded	0	0
Unpaid principal balance	0	0
Related Allowance	0	0
Average recorded investment, with no related allowance recorded	0	0	0
Average recorded investment, with an allowance recorded	0	0	0
Average recorded investment	0	0	0
Interest income recognized, with no related allowance recorded	0	0	0
Interest income recognized, with an allowance recorded	0	0	0
Interest income recognized	0	0	0
Residential construction
Recorded investment:
With no related allowance recorded	0	0
With an allowance recorded	0	0
Recorded investment	0	0
Unpaid principal balance:
With no related allowance recorded	0	0
With an allowance recorded	0	0
Unpaid principal balance	0	0
Related Allowance	0	0
Average recorded investment, with no related allowance recorded	0	0	0
Average recorded investment, with an allowance recorded	0	0	0
Average recorded investment	0	0	0
Interest income recognized, with no related allowance recorded	0	0	0
Interest income recognized, with an allowance recorded	0	0	0
Interest income recognized	0	0	0
Commercial
Recorded investment:
With no related allowance recorded	1,948	3,722
With an allowance recorded	6,470	1,618
Recorded investment	8,418	5,340
Unpaid principal balance:
With no related allowance recorded	2,285	4,775
With an allowance recorded	6,470	1,618
Unpaid principal balance	8,755	6,393
Related Allowance	1,015	628
Average recorded investment, with no related allowance recorded	4,534	3,275	2,776
Average recorded investment, with an allowance recorded	6,990	1,789	3,691
Average recorded investment	11,524	5,064	6,467
Interest income recognized, with no related allowance recorded	276	28	54
Interest income recognized, with an allowance recorded	132	122	723
Interest income recognized	408	150	777
Consumer
Recorded investment:
With no related allowance recorded	2	32
With an allowance recorded	505	57
Recorded investment	507	89
Unpaid principal balance:
With no related allowance recorded	2	32
With an allowance recorded	505	57
Unpaid principal balance	507	89
Related Allowance	454	4
Average recorded investment, with no related allowance recorded	21	22	1
Average recorded investment, with an allowance recorded	360	57	57
Average recorded investment	381	79	58
Interest income recognized, with no related allowance recorded	4	0	0
Interest income recognized, with an allowance recorded	24	4	3
Interest income recognized	$ 28	$ 4	$ 3

Bank segment (HEI only) - TDR N

Bank segment (HEI only) - TDR Narrative (Details) - Residential land	12 Months Ended
	Dec. 31, 2019
Troubled debt restructurings
Period of interest-only monthly payment term loan	3 years
Maximum
Troubled debt restructurings
Extension of maturity date	5 years

Bank segment (HEI only) - Loan

Bank segment (HEI only) - Loan Modifications (Details)	12 Months Ended
	Dec. 31, 2019USD ($)contract	Dec. 31, 2018USD ($)contract	Dec. 31, 2017USD ($)contract
Loan modifications determined to be troubled debt restructurings
Number of contracts | contract	25	70	57
Pre-modification outstanding recorded investment	$ 8,821,000	$ 10,728,000	$ 3,935,000
Post-modification outstanding recorded investment	$ 680,000	$ 815,000	$ 889,000
Troubled debt restructuring that subsequently defaulted, number of contracts | contract	0	2	1
Troubled debt restructuring that subsequently defaulted, recorded investment	$ 0	$ 327,000	$ 222,000
Commitments to borrowers whose loan terms are impaired or modified under troubled debt restructuring	0	0
Consumer mortgage loans collateralized by residential real estate property in foreclosure process	$ 3,500,000	$ 4,200,000
Residential 1-4 family
Loan modifications determined to be troubled debt restructurings
Number of contracts | contract	11	3	3
Pre-modification outstanding recorded investment	$ 1,770,000	$ 566,000	$ 469,000
Post-modification outstanding recorded investment	$ 190,000	$ 26,000	$ 65,000
Troubled debt restructuring that subsequently defaulted, number of contracts | contract	0	0	1
Troubled debt restructuring that subsequently defaulted, recorded investment	$ 0	$ 0	$ 222,000
Commercial real estate
Loan modifications determined to be troubled debt restructurings
Number of contracts | contract	0	0	0
Pre-modification outstanding recorded investment	$ 0	$ 0	$ 0
Post-modification outstanding recorded investment	$ 0	$ 0	$ 0
Troubled debt restructuring that subsequently defaulted, number of contracts | contract	0	0	0
Troubled debt restructuring that subsequently defaulted, recorded investment	$ 0	$ 0	$ 0
Home equity line of credit
Loan modifications determined to be troubled debt restructurings
Number of contracts | contract	3	53	44
Pre-modification outstanding recorded investment	$ 442,000	$ 6,659,000	$ 2,791,000
Post-modification outstanding recorded investment	$ 73,000	$ 578,000	$ 545,000
Troubled debt restructuring that subsequently defaulted, number of contracts | contract	0	1	0
Troubled debt restructuring that subsequently defaulted, recorded investment	$ 0	$ 81,000	$ 0
Residential land
Loan modifications determined to be troubled debt restructurings
Number of contracts | contract	3	2	1
Pre-modification outstanding recorded investment	$ 1,086,000	$ 1,338,000	$ 92,000
Post-modification outstanding recorded investment	$ 0	$ 0	$ 0
Troubled debt restructuring that subsequently defaulted, number of contracts | contract	0	0	0
Troubled debt restructuring that subsequently defaulted, recorded investment	$ 0	$ 0	$ 0
Commercial construction
Loan modifications determined to be troubled debt restructurings
Number of contracts | contract	0	0	0
Pre-modification outstanding recorded investment	$ 0	$ 0	$ 0
Post-modification outstanding recorded investment	$ 0	$ 0	$ 0
Troubled debt restructuring that subsequently defaulted, number of contracts | contract	0	0	0
Troubled debt restructuring that subsequently defaulted, recorded investment	$ 0	$ 0	$ 0
Residential construction
Loan modifications determined to be troubled debt restructurings
Number of contracts | contract	0	0	0
Pre-modification outstanding recorded investment	$ 0	$ 0	$ 0
Post-modification outstanding recorded investment	$ 0	$ 0	$ 0
Troubled debt restructuring that subsequently defaulted, number of contracts | contract	0	0	0
Troubled debt restructuring that subsequently defaulted, recorded investment	$ 0	$ 0	$ 0
Commercial
Loan modifications determined to be troubled debt restructurings
Number of contracts | contract	8	12	8
Pre-modification outstanding recorded investment	$ 5,523,000	$ 2,165,000	$ 525,000
Post-modification outstanding recorded investment	$ 417,000	$ 211,000	$ 250,000
Troubled debt restructuring that subsequently defaulted, number of contracts | contract	0	1	0
Troubled debt restructuring that subsequently defaulted, recorded investment	$ 0	$ 246,000	$ 0
Consumer
Loan modifications determined to be troubled debt restructurings
Number of contracts | contract	0	0	1
Pre-modification outstanding recorded investment	$ 0	$ 0	$ 58,000
Post-modification outstanding recorded investment	$ 0	$ 0	$ 29,000
Troubled debt restructuring that subsequently defaulted, number of contracts | contract	0	0	0
Troubled debt restructuring that subsequently defaulted, recorded investment	$ 0	$ 0	$ 0
Troubled debt restructurings real estate loans
Loan modifications determined to be troubled debt restructurings
Minimum period of payment default of loans determined to be TDRs	90 days	90 days	90 days

Bank segment (HEI only) - Mortg

Bank segment (HEI only) - Mortgage Servicing Rights, Narrative (Details) - American Savings Bank (ASB) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Loans receivable
Repurchased mortgage loans	$ 0	$ 0	$ 0
Mortgage loans repurchase reserve	100,000	100,000	100,000
Mortgage servicing fees	3,000,000	3,000,000	3,000,000
Residential loan
Loans receivable
Proceeds from sale of mortgage loans	277,100,000	112,200,000	128,000,000
Gain on sale of mortgage loans	$ 4,900,000	$ 1,500,000	$ 2,200,000

Bank segment (HEI only) - Mor_2

Bank segment (HEI only) - Mortgage Servicing Rights (Details) - American Savings Bank (ASB) - Allowance for mortgage-servicing assets – bank - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Loans receivable
Gross carrying amount	$ 21,543	$ 18,556
Accumulated amortization	(12,442)	(10,494)
Valuation allowance	0	0	$ 0	$ 0
Net carrying amount	$ 9,101	$ 8,062	$ 8,639

Bank segment (HEI only) - Mor_3

Bank segment (HEI only) - Mortgage Servicing Rights and Valuation Allowance Roll Forward (Details) - American Savings Bank (ASB) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Mortgage Servicing Rights [Roll Forward]
Beginning balance	$ 8,062
Ending balance	9,101	$ 8,062
Allowance for mortgage-servicing assets – bank
Mortgage Servicing Rights [Roll Forward]
Beginning balance	8,062	8,639	$ 9,373
Amount capitalized	2,987	1,045	1,239
Amortization	(1,948)	(1,622)	(1,973)
Sale of mortgage servicing rights	0	0	0
Other-than-temporary impairment	0	0	0
Ending balance	9,101	8,062	8,639
Valuation Allowance [Roll Forward]
Valuation allowance, beginning balance	0	0	0
Provision (recovery)	0	0	0
Other-than-temporary impairment	0	0	0
Valuation allowance, ending balance	0	0	0
Net carrying amount	9,101	$ 8,062	$ 8,639
Estimated Aggregate Amortization Expenses of Mortgage Servicing Rights [Abstract]
2020	1,500
2021	1,200
2022	1,100
2023	900
2024	$ 800

Bank segment (HEI only) - Key A

Bank segment (HEI only) - Key Assumptions Used in Estimating the Fair Value of ASB's Mortgage Servicing Rights (Details) - Allowance for mortgage-servicing assets – bank $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Prepayment rate:
25 basis points adverse rate change	$ (950)	$ (250)
50 basis points adverse rate change	(1,947)	(566)
Discount rate:
25 basis points adverse rate change	(102)	(139)
50 basis points adverse rate change	(202)	(275)
American Savings Bank (ASB)
Mortgage Servicing Rights
Unpaid principal balance	$ 1,276,437	$ 1,188,514
Weighted average note rate	3.96%	3.98%
American Savings Bank (ASB) | Discount rate
Mortgage Servicing Rights
Weighted average measurement input	0.093	0.100
American Savings Bank (ASB) | Prepayment speed
Mortgage Servicing Rights
Weighted average measurement input	0.114	0.065

Bank segment (HEI only) - Depos

Bank segment (HEI only) - Deposit Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Weighted-average stated rate
Savings	0.09%	0.07%
Checking, interest-bearing	0.09%	0.09%
Checking, Noninterest-bearing	0.00%	0.00%
Commercial checking	0.00%	0.00%
Money market	0.69%	0.63%
Time certificates	1.42%	1.61%
Total weighted-average stated rate	0.24%	0.27%
Deposit liabilities
Savings	$ 2,379,522	$ 2,322,552
Checking
Interest-bearing	1,062,122	1,055,019
Noninterest-bearing	977,459	932,608
Commercial checking	932,223	868,119
Money market	150,751	152,713
Time certificates	769,825	827,841
Total Amount	6,271,902	6,158,852
Certificate accounts of $100,000 or more	456,500	500,200
Term certificates outstanding, scheduled maturities
2020	503,214
2021	112,632
2022	87,132
2023	29,134
2024	35,253
Thereafter	2,460
Total	769,825
Overdrawn deposit accounts classified as loans	2,400	2,100
Interest expense on deposit liabilities by type of deposit
Time certificates	12,675	11,044	$ 7,687
Savings	1,904	1,639	1,567
Money market	953	602	168
Interest-bearing checking	1,298	706	238
Interest expense on deposit liabilities	$ 16,830	$ 13,991	$ 9,660

Bank segment (HEI only) - Secur

Bank segment (HEI only) - Securities Sold Under Agreements to Repurchase, Including Related Collateral Received From or Pledged to Counterparties (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Securities sold under agreements to repurchase
Gross amount of recognized liabilities	$ 115,000	$ 65,000
Gross amount offset in the Balance Sheets	0	0
Net amount of liabilities presented in the Balance Sheets	$ 115,000	65,000
Fair value of collateral, percent of fair value	5.00%
Repurchase liability	$ 115,110	$ 65,040
Weighted-average interest rate as of end of the period	0.98%	0.75%
Identical securities
Securities sold under agreements to repurchase
Repurchase liability	$ 115,000	$ 65,000	$ 141,000
Average amount outstanding during the year	80,000	99,000	98,000
Maximum amount outstanding as of any month-end	$ 115,000	$ 152,000	$ 141,000
Weighted-average interest rate as of end of the period	0.98%	0.75%	0.65%
Weighted-average interest rate during the year	0.96%	0.71%	0.26%
Weighted-average remaining days to maturity as of end of the period	1 day	1 day	1 day
Commercial account holders
Securities sold under agreements to repurchase
Net amount of liabilities presented in the Balance Sheets	$ 115,000	$ 65,000
Financial instruments	130,000	92,000
Cash collateral pledged	$ 0	$ 0

Bank segment (HEI only) - Sec_2

Bank segment (HEI only) - Securities Sold Under Agreements to Repurchase (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Securities sold under agreements to repurchase
Repurchase liability	$ 115,110	$ 65,040
Weighted-average interest rate	0.98%	0.75%
Collateralized by mortgage-related securities and federal agency obligations
Securities sold under agreements to repurchase
Collateralized by mortgage-backed securities and federal agency obligations at fair value plus accrued interest	$ 129,527	$ 92,290
Overnight
Securities sold under agreements to repurchase
Repurchase liability	$ 115,110	$ 65,040
Weighted-average interest rate	0.98%	0.75%
Overnight | Collateralized by mortgage-related securities and federal agency obligations
Securities sold under agreements to repurchase
Collateralized by mortgage-backed securities and federal agency obligations at fair value plus accrued interest	$ 129,527	$ 92,290
1 to 29 days
Securities sold under agreements to repurchase
Repurchase liability	$ 0	$ 0
Weighted-average interest rate	0.00%	0.00%
1 to 29 days | Collateralized by mortgage-related securities and federal agency obligations
Securities sold under agreements to repurchase
Collateralized by mortgage-backed securities and federal agency obligations at fair value plus accrued interest	$ 0	$ 0
30 to 90 days
Securities sold under agreements to repurchase
Repurchase liability	$ 0	$ 0
Weighted-average interest rate	0.00%	0.00%
30 to 90 days | Collateralized by mortgage-related securities and federal agency obligations
Securities sold under agreements to repurchase
Collateralized by mortgage-backed securities and federal agency obligations at fair value plus accrued interest	$ 0	$ 0
Over 90 days
Securities sold under agreements to repurchase
Repurchase liability	$ 0	$ 0
Weighted-average interest rate	0.00%	0.00%
Over 90 days | Collateralized by mortgage-related securities and federal agency obligations
Securities sold under agreements to repurchase
Collateralized by mortgage-backed securities and federal agency obligations at fair value plus accrued interest	$ 0	$ 0

Bank segment (HEI only) - FHLB

Bank segment (HEI only) - FHLB Advances (Details) - American Savings Bank (ASB) - USD ($)	Feb. 28, 2020	Dec. 31, 2019	Dec. 31, 2018
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
FHLB advances		$ 0	$ 45,000,000
FHLB advances, unused funds		$ 2,300,000,000	$ 2,000,000,000
Subsequent Event
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
FHLB advances, unused funds	$ 1,500,000,000
Percent in first lien position	54.00%

Bank segment (HEI only) - Addit

Bank segment (HEI only) - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 1988
Parent Company
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Cash dividends paid	$ 157	$ 154	$ 125
Parent Company | Consolidated subsidiary | American Savings Bank (ASB) | Management and administrative services
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Revenue from related party	2.3	2.2	$ 2.1
Parent Company | Maximum
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Obligation to contribute additional capital under the Capital Maintenance Agreement				$ 65.1
Reduction in obligation to contribute additional capital under the Capital Maintenance Agreement	28.3
American Savings Bank (ASB)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Cash dividends paid	$ 56	$ 50

Bank segment (HEI only) - Capit

Bank segment (HEI only) - Capital And Ratio (Details) - American Savings Bank (ASB) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier 1 leverage, actual capital	$ 641,547	$ 606,291
Tier 1 leverage, actual ratio	9.06%	8.70%
Tier 1 leverage, required capital	$ 283,122	$ 278,811
Tier 1 leverage, required ratio	4.00%	4.00%
Tier 1 leverage, required to be well capitalized capital	$ 353,903	$ 348,514
Tier 1 leverage, required to be well capitalized ratio	5.00%	5.00%
Common equity tier 1, actual capital	$ 641,547	$ 606,291
Common equity tier 1, actual ratio	13.18%	12.80%
Common equity tier 1, required capital	$ 219,071	$ 213,190
Common equity tier 1, required ratio	4.50%	4.50%
Common equity tier 1, required to be well capitalized, Capital	$ 316,435	$ 307,941
Common equity tier 1, required to be well capitalized, Ratio	6.50%	6.50%
Tier 1 capital, actual capital	$ 641,547	$ 606,291
Tier 1 capital, actual ratio	13.18%	12.80%
Tier 1 capital, required capital	$ 292,094	$ 284,253
Tier 1 capital, required ratio	6.00%	6.00%
Tier 1 capital, Required to be well capitalized, Capital	$ 389,459	$ 379,004
Tier 1 capital, Required to be well capitalized, Ratio	8.00%	8.00%
Total capital, Actual capital	$ 696,643	$ 660,151
Total capital, Actual ratio	14.31%	13.93%
Total capital, Required capital	$ 389,459	$ 379,004
Total capital, Required ratio	8.00%	8.00%
Total capital, Required to be well capitalized, Capital	$ 486,823	$ 473,755
Total capital, Required to be well capitalized, Ratio	10.00%	10.00%

Bank segment (HEI only) - Deriv

Bank segment (HEI only) - Derivative Financial Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative instrument
Net gains (losses) recognized in the Statement of Income	$ 207	$ (59)	$ (137)
Not Designated as Hedging Instrument
Derivative instrument
Asset derivative	300	91
Liability derivative	45	43
Interest Rate Lock Commitments
Derivative instrument
Notional amount	23,171	10,180
Fair value	297	91
Interest Rate Lock Commitments | Not Designated as Hedging Instrument
Derivative instrument
Asset derivative	297	91
Liability derivative	0	0
Interest Rate Lock Commitments | Not Designated as Hedging Instrument | Mortgage banking income
Derivative instrument
Net gains (losses) recognized in the Statement of Income	206	(40)	(290)
Forward commitments
Derivative instrument
Notional amount	29,383	10,132
Fair value	(42)	(43)
Forward commitments | Not Designated as Hedging Instrument
Derivative instrument
Asset derivative	3	0
Liability derivative	45	43
Forward commitments | Not Designated as Hedging Instrument | Mortgage banking income
Derivative instrument
Net gains (losses) recognized in the Statement of Income	$ 1	$ (19)	$ 153

Bank segment (HEI only) - Off B

Bank segment (HEI only) - Off Balance Sheet Arrangements and Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended
	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
American Savings Bank (ASB)
Guarantees
Minimum reserve ratio	1.36%
FDIC insurance assessment		$ 1,200	$ 2,500	$ 2,600
American Savings Bank (ASB) | Indemnification Agreement
Guarantees
Accrued indemnification litigation obligation		1,100
Reserve for Off-balance Sheet Activities
Guarantees
Unused commitments to extend credit		1,878,791	1,859,046
Home equity line of credit
Guarantees
Unused commitments to extend credit		1,290,854	1,242,804
Commercial and commercial real estate
Guarantees
Unused commitments to extend credit		484,806	515,058
Consumer
Guarantees
Unused commitments to extend credit		70,088	70,292
Residential 1-4 family
Guarantees
Unused commitments to extend credit		21,131	17,552
Commercial and financial standby letters of credit
Guarantees
Unused commitments to extend credit		$ 11,912	$ 13,340

Short-term borrowings (Details)

Short-term borrowings (Details)	Dec. 23, 2019USD ($)	Dec. 31, 2019USD ($)instrumentInstitution	Dec. 31, 2018USD ($)
Short-term borrowings
Outstanding amount		$ 185,710,000	$ 73,992,000
Maximum
Short-term borrowings
Capitalization ratio required to be maintained as per the debt covenant		50.00%
Letter of Credit | Hamakua Energy Partners, L.P. (HEP)
Short-term borrowings
Number of letters of credit entered into during the period | instrument		3
Letters of credit outstanding		$ 6,000,000	7,000,000
Commercial paper
Short-term borrowings
Outstanding amount		$ 97,000,000	$ 49,000,000
Weighted-average interest rate		2.30%	2.90%
Line of credit facility | Term Loan Credit Agreement Maturing December 2020
Short-term borrowings
Line of credit facility basis point spread		1.375%
Annual fees on undrawn commitments, basis points (as a percent)		0.20%
Line of credit facility | Credit Facilities Effective July 2017
Short-term borrowings
Number of financial institutions | Institution		8
Line of credit facility | HEI Facility
Short-term borrowings
Maximum capacity under syndicated credit facilities		$ 150,000,000
Short-term debt, net		$ 0	$ 0
Hawaiian Electric Company, Inc. and Subsidiaries
Short-term borrowings
Weighted-average interest rate		2.30%
Short-term debt, net		$ 88,987,000	25,000,000
Ratio of consolidated subsidiary debt to total consolidated capitalization required to be maintained as per the debt covenant		65.00%
Ratio of consolidated capitalization required to be maintained as per the debt covenant		35.00%
Hawaiian Electric Company, Inc. and Subsidiaries | Commercial paper
Short-term borrowings
Outstanding amount		$ 39,000,000	0
Hawaiian Electric Company, Inc. and Subsidiaries | Line of credit facility | Term Loan Credit Agreement Maturing December 2020
Short-term borrowings
Debt instrument term	364 days
Maximum capacity under syndicated credit facilities	$ 100,000,000
Proceeds from lines of credit	$ 50,000,000
Remaining borrowing capacity		$ 50,000,000
Hawaiian Electric Company, Inc. and Subsidiaries | Line of credit facility | Credit Facilities Effective July 2017
Short-term borrowings
Number of financial institutions | Institution		8
Hawaiian Electric Company, Inc. and Subsidiaries | Line of credit facility | Hawaiian Electric Facility
Short-term borrowings
Maximum capacity under syndicated credit facilities		$ 200,000,000
Short-term debt, net		$ 0	$ 0

Long-term debt - Schedule of Lo

Long-term debt - Schedule of Long-Term Debt and Maturities (Details) - USD ($)	1 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Less unamortized debt issuance costs		$ (2,350,000)	$ (2,599,000)
Long-term debt, net—other than bank		1,964,365,000	1,879,641,000
Aggregate principal payments, fiscal year maturity:
2020		102,000,000
2021		54,000,000
2022		213,000,000
2023		154,000,000
2024		5,000,000
Hawaiian Electric Company, Inc. and Subsidiaries
Debt Instrument [Line Items]
Gross long-term debt		1,505,000,000	1,426,546,000
Aggregate principal payments, fiscal year maturity:
2020		96,000,000
2021		0
2022		52,000,000
2023		100,000,000
2024		0
Special purpose revenue bonds issued on behalf of electric utility subsidiaries
Debt Instrument [Line Items]
Long-term debt, net—other than bank		1,497,667,000	1,418,802,000
Senior notes | Hawaiian Electric Company, Inc. and Subsidiaries
Debt Instrument [Line Items]
Gross long-term debt		963,000,000	913,000,000
Senior notes | HEI 2.99% term loan, due 2022
Debt Instrument [Line Items]
Gross long-term debt		150,000,000	150,000,000
Senior notes | HEI 5.67% senior notes, due 2021
Debt Instrument [Line Items]
Gross long-term debt		$ 50,000,000	50,000,000
Debt instrument, stated interest rate		5.67%
Senior notes | HEI 3.99% senior notes, due 2023
Debt Instrument [Line Items]
Gross long-term debt		$ 50,000,000	50,000,000
Debt instrument, stated interest rate		3.99%
Senior notes | HEI 4.58% senior notes, due 2025
Debt Instrument [Line Items]
Debt instrument, stated interest rate		4.58%
Senior notes | HEI 4.72% senior notes, due 2028
Debt Instrument [Line Items]
Debt instrument, stated interest rate		4.72%
Senior notes | Hamakua Energy 4.02% notes, due 2030, secured by real and personal property of Hamakua Energy, LLC
Debt Instrument [Line Items]
Gross long-term debt		$ 59,699,000	63,438,000
Debt instrument, stated interest rate		4.02%
Term loan | Hawaiian Electric Company, Inc. and Subsidiaries
Debt Instrument [Line Items]
Gross long-term debt		$ 542,000,000	462,000,000
Term loan | HEI 2.99% term loan, due 2022
Debt Instrument [Line Items]
Debt instrument, stated interest rate		2.99%
Term loan | HEI 4.58% senior notes, due 2025
Debt Instrument [Line Items]
Gross long-term debt		$ 50,000,000	50,000,000
Term loan | HEI 4.72% senior notes, due 2028
Debt Instrument [Line Items]
Gross long-term debt		100,000,000	100,000,000
Unsecured Debt | Hawaiian Electric Company, Inc. and Subsidiaries
Debt Instrument [Line Items]
Gross long-term debt		963,000,000	964,546,000
Unsecured Debt | Mauo Unsecured Loan Due 2022
Debt Instrument [Line Items]
Gross long-term debt		$ 9,349,000	$ 0
Aggregate principal payments, fiscal year maturity:
Debt instrument, face amount	$ 50,500,000
Line of credit facility basis point spread		1.375%
Unsecured Debt | Mauo Unsecured Loan Due 2022 | LIBOR
Aggregate principal payments, fiscal year maturity:
Line of credit facility basis point spread	1.375%

Long-term debt - Changes in Lon

Long-term debt - Changes in Long-Term Debt (Details) - USD ($)	Dec. 31, 2019	Jul. 26, 2019	May 15, 2019	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Oct. 10, 2019	Jul. 18, 2019	May 13, 2019
Debt Instrument [Line Items]
Repayments of long-term debt					$ 287,285,000	$ 53,887,000	$ 465,000,000
Hawaiian Electric Company, Inc. and Subsidiaries
Debt Instrument [Line Items]
Long-term debt	$ 1,505,000,000				1,505,000,000	1,426,546,000
Repayments of long-term debt					283,546,000	50,000,000	$ 265,000,000
Repayments of long-term debt including interest	84,000,000
Interest paid	2,000,000
Hawaiian Electric
Debt Instrument [Line Items]
Repayments of long-term debt	62,000,000
Maui Electric
Debt Instrument [Line Items]
Repayments of long-term debt	20,000,000
Unsecured Debt | Hawaiian Electric Company, Inc. and Subsidiaries
Debt Instrument [Line Items]
Long-term debt	963,000,000				$ 963,000,000	964,546,000
Unsecured Debt | Mauo Unsecured Loan Due 2022
Debt Instrument [Line Items]
Debt instrument, face amount				$ 50,500,000
Line of credit facility basis point spread					1.375%
Long-term debt	9,349,000				$ 9,349,000	$ 0
Unsecured Debt | Mauo Unsecured Loan Due 2022 | LIBOR
Debt Instrument [Line Items]
Line of credit facility basis point spread				1.375%
Unsecured Debt | Series 2019A | Hawaiian Electric Company, Inc. and Subsidiaries
Debt Instrument [Line Items]
Debt instrument, face amount										$ 50,000,000
Debt instrument, stated interest rate										4.21%
Unsecured Debt | Series 2019A | Hawaiian Electric
Debt Instrument [Line Items]
Debt instrument, face amount										$ 30,000,000
Unsecured Debt | Series 2019A | Hawaii Electric Light
Debt Instrument [Line Items]
Debt instrument, face amount										10,000,000
Unsecured Debt | Series 2019A | Maui Electric
Debt Instrument [Line Items]
Debt instrument, face amount										$ 10,000,000
Unsecured Debt | 2004 Junior subordinated deferrable interest debentures redeemed | Hawaiian Electric Company, Inc. and Subsidiaries
Debt Instrument [Line Items]
Debt instrument, stated interest rate			6.50%
Extinguishment of debt amount			$ 51,500,000
Unsecured Debt | 2004 Junior subordinated deferrable interest debentures redeemed | Hawaiian Electric
Debt Instrument [Line Items]
Extinguishment of debt amount			31,500,000
Unsecured Debt | 2004 Junior subordinated deferrable interest debentures redeemed | Hawaii Electric Light
Debt Instrument [Line Items]
Extinguishment of debt amount			10,000,000
Unsecured Debt | 2004 Junior subordinated deferrable interest debentures redeemed | Maui Electric
Debt Instrument [Line Items]
Extinguishment of debt amount			$ 10,000,000
Unsecured Debt | Refunding Series 2019 Special Purpose Revenue Bonds | Hawaiian Electric Company, Inc. and Subsidiaries
Debt Instrument [Line Items]
Debt instrument, face amount									$ 150,000,000
Debt instrument, stated interest rate									3.20%
Unsecured Debt | Refunding Series 2019 Special Purpose Revenue Bonds | Hawaiian Electric
Debt Instrument [Line Items]
Debt instrument, face amount									$ 90,000,000
Unsecured Debt | Refunding Series 2019 Special Purpose Revenue Bonds | Hawaii Electric Light
Debt Instrument [Line Items]
Debt instrument, face amount									$ 60,000,000
Unsecured Debt | Series 2009 Special Purpose Revenue Bonds Redeemed | Hawaiian Electric Company, Inc. and Subsidiaries
Debt Instrument [Line Items]
Debt instrument, stated interest rate		6.50%
Extinguishment of debt amount		$ 150,000,000
Unsecured Debt | Series 2009 Special Purpose Revenue Bonds Redeemed | Hawaiian Electric
Debt Instrument [Line Items]
Extinguishment of debt amount		90,000,000
Unsecured Debt | Series 2009 Special Purpose Revenue Bonds Redeemed | Hawaii Electric Light
Debt Instrument [Line Items]
Extinguishment of debt amount		$ 60,000,000
Unsecured Debt | Series 2019 Special Purpose Revenue Bonds | Hawaiian Electric Company, Inc. and Subsidiaries
Debt Instrument [Line Items]
Debt instrument, face amount								$ 80,000,000
Debt instrument, stated interest rate								3.50%
Unsecured Debt | Series 2019 Special Purpose Revenue Bonds | Hawaiian Electric
Debt Instrument [Line Items]
Debt instrument, face amount								$ 70,000,000
Undrawn funds sitting with trustee	30,800,000				30,800,000
Unsecured Debt | Series 2019 Special Purpose Revenue Bonds | Hawaii Electric Light
Debt Instrument [Line Items]
Debt instrument, face amount								2,500,000
Undrawn funds sitting with trustee	100,000				100,000
Unsecured Debt | Series 2019 Special Purpose Revenue Bonds | Maui Electric
Debt Instrument [Line Items]
Debt instrument, face amount								$ 7,500,000
Undrawn funds sitting with trustee	$ 0				$ 0

Shareholders' equity - Addition

Shareholders' equity - Additional Information (Details) shares in Millions	Dec. 31, 2019shares
Equity [Abstract]
Common stock reserved for future issuance (in shares)	18.5

Shareholders' equity - Accumula

Shareholders' equity - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
AOCI Attributable to Parent [Roll Forward]
Beginning Balance	$ 2,162,280	$ 2,097,386	$ 2,066,753
Current period other comprehensive income (loss) and reclassifications, net of taxes	30,571	(8,669)	(1,372)
Reclass of AOCI for tax rate reduction impact1			(7,440)
Ending Balance	2,280,260	2,162,280	2,097,386
Hawaiian Electric Company, Inc. and Subsidiaries
AOCI Attributable to Parent [Roll Forward]
Beginning Balance	1,957,641	1,845,283	1,799,787
Current period other comprehensive income (loss) and reclassifications, net of taxes	(1,378)	1,318	(688)
Reclass of AOCI for tax rate reduction impact1			(209)
Ending Balance	2,047,352	1,957,641	1,845,283
AOCI
AOCI Attributable to Parent [Roll Forward]
Beginning Balance	(50,610)	(41,941)	(33,129)
Current period other comprehensive income (loss) and reclassifications, net of taxes	30,571	(8,669)	(1,372)
Ending Balance	(20,039)	(50,610)	(41,941)
AOCI | Hawaiian Electric Company, Inc. and Subsidiaries
AOCI Attributable to Parent [Roll Forward]
Beginning Balance	99	(1,219)	(322)
Current period other comprehensive income (loss) and reclassifications, net of taxes	(1,378)	1,318	(688)
Reclass of AOCI for tax rate reduction impact1			(209)
Ending Balance	(1,279)	99	(1,219)
Net unrealized gains (losses) on securities
AOCI Attributable to Parent [Roll Forward]
Beginning Balance	(24,423)	(14,951)	(7,931)
Current period other comprehensive income (loss) and reclassifications, net of taxes	26,904	(9,472)	(4,370)
Reclass of AOCI for tax rate reduction impact1			(2,650)
Ending Balance	2,481	(24,423)	(14,951)
Unrealized gains (losses) on derivatives
AOCI Attributable to Parent [Roll Forward]
Beginning Balance	(436)	0	(454)
Current period other comprehensive income (loss) and reclassifications, net of taxes	(1,177)	(436)	454
Reclass of AOCI for tax rate reduction impact1			0
Ending Balance	(1,613)	(436)	0
Unrealized gains (losses) on derivatives | Hawaiian Electric Company, Inc. and Subsidiaries
AOCI Attributable to Parent [Roll Forward]
Beginning Balance	0	0	(454)
Current period other comprehensive income (loss) and reclassifications, net of taxes	0	0	454
Reclass of AOCI for tax rate reduction impact1			0
Ending Balance	0	0	0
Retirement benefit plans
AOCI Attributable to Parent [Roll Forward]
Beginning Balance	(25,751)	(26,990)	(24,744)
Current period other comprehensive income (loss) and reclassifications, net of taxes	4,844	1,239	2,544
Reclass of AOCI for tax rate reduction impact1			(4,790)
Ending Balance	(20,907)	(25,751)	(26,990)
Retirement benefit plans | Hawaiian Electric Company, Inc. and Subsidiaries
AOCI Attributable to Parent [Roll Forward]
Beginning Balance	99	(1,219)	132
Current period other comprehensive income (loss) and reclassifications, net of taxes	(1,378)	1,318	(1,142)
Reclass of AOCI for tax rate reduction impact1			(209)
Ending Balance	$ (1,279)	$ 99	$ (1,219)

Shareholders' equity - Reclassi

Shareholders' equity - Reclassification Out Of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Revenues	$ (725,966)	$ (771,535)	$ (715,485)	$ (661,615)	$ (761,650)	$ (768,048)	$ (685,277)	$ (645,874)	$ (2,874,601)	$ (2,860,849)	$ (2,555,625)
Total reclassifications									(6,548)	29,340	(62,533)
Hawaiian Electric Company, Inc. and Subsidiaries
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Revenues	$ (645,333)	$ (688,330)	$ (633,784)	$ (578,495)	$ (680,563)	$ (687,409)	$ (608,126)	$ (570,427)	(2,545,942)	(2,546,525)	(2,257,566)
Total reclassifications									(6,627)	27,337	(63,793)
Bank
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Revenues									(328,570)	(314,275)	(297,640)
Electric utility
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Revenues									(2,545,942)	(2,546,525)	(2,257,566)
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications									10,107	21,015	15,737
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent | Hawaiian Electric Company, Inc. and Subsidiaries
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications									9,550	19,012	14,477
Accumulated Defined Benefit Plans Adjustment, Impact Of Decision And Orders Of The Public Utility Commission Included In Regulatory Assets
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications									(16,177)	8,325	(78,724)
Accumulated Defined Benefit Plans Adjustment, Impact Of Decision And Orders Of The Public Utility Commission Included In Regulatory Assets | Hawaiian Electric Company, Inc. and Subsidiaries
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications									(16,177)	8,325	(78,724)
Amount reclassified from AOCI | Net unrealized gains (losses) on securities | Bank
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Revenues									(478)	0	0
Amount reclassified from AOCI | Unrealized gains (losses) on derivatives | Window forward contracts | Hawaiian Electric Company, Inc. and Subsidiaries
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications									0	0	454
Amount reclassified from AOCI | Unrealized gains (losses) on derivatives | Electric utility | Window forward contracts
Reclassification Adjustment Out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications									$ 0	$ 0	$ 454

Leases - (Details)

Leases - (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Jan. 31, 2020USD ($)	Aug. 31, 2019USD ($)ft²
Lessee, Lease, Description [Line Items]
Renewal option (up to)	10 years
Operating lease, liability	$ 199,571
Lease payments basis reduction for impact of collateral	0.15%
Operating lease cost	$ 73,584
Variable lease cost	205,172
Total lease cost	278,756
Cash paid for amounts included in the measurement of lease liabilities :
Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases	$ 73,041
Weighted-average remaining lease term—operating leases (in years)	3 years 6 months
Weighted-average discount rate—operating leases	3.96%
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2020	$ 75,000
2021	73,000
2022	48,000
2023	5,000
2024	4,000
Thereafter	9,000
Total lease payments	214,000
Less: Imputed interest	(14,000)
Total present value of lease payments1	$ 200,000
Future minimum lease payments
2019		$ 74,000
2020		72,000
2021		71,000
2022		47,000
2023		4,000
Thereafter		12,000
Total lease payments		280,000
Operating lease, rent expense		21,000	$ 20,000
FHLB Des Moines | Maximum
Lessee, Lease, Description [Line Items]
Long-term debt term	30 years
Other Operating Leases
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 10,265
Variable lease cost	13,034
Total lease cost	23,299
Cash paid for amounts included in the measurement of lease liabilities :
Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases	$ 10,447
Weighted-average remaining lease term—operating leases (in years)	6 years 6 months
Weighted-average discount rate—operating leases	3.50%
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2020	$ 12,000
2021	10,000
2022	6,000
2023	5,000
2024	4,000
Thereafter	9,000
Total lease payments	46,000
Less: Imputed interest	(5,000)
Total present value of lease payments1	41,000
Future minimum lease payments
2019		11,000
2020		9,000
2021		8,000
2022		5,000
2023		4,000
Thereafter		12,000
Total lease payments		49,000
Power Purchase Agreements Qualifying As Operating Leases
Lessee, Lease, Description [Line Items]
Operating lease cost	63,319
Variable lease cost	192,138
Total lease cost	255,457
Cash paid for amounts included in the measurement of lease liabilities :
Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases	$ 62,594
Weighted-average remaining lease term—operating leases (in years)	2 years 9 months 18 days
Weighted-average discount rate—operating leases	4.08%
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2020	$ 63,000
2021	63,000
2022	42,000
2023	0
2024	0
Thereafter	0
Total lease payments	168,000
Less: Imputed interest	(9,000)
Total present value of lease payments1	159,000
Future minimum lease payments
2019		63,000
2020		63,000
2021		63,000
2022		42,000
2023		0
Thereafter		0
Total lease payments		231,000
PGV Facility
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Operating lease, not in service, annual capacity payment	7,000
Hawaiian Electric Company, Inc. and Subsidiaries
Lessee, Lease, Description [Line Items]
Operating lease cost	68,274
Variable lease cost	202,410
Total lease cost	270,684
Cash paid for amounts included in the measurement of lease liabilities :
Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases	$ 68,362
Weighted-average remaining lease term—operating leases (in years)	2 years 10 months 24 days
Weighted-average discount rate—operating leases	4.08%
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2020	$ 70,000
2021	68,000
2022	45,000
2023	2,000
2024	1,000
Thereafter	2,000
Total lease payments	188,000
Less: Imputed interest	(11,000)
Total present value of lease payments1	177,000
Future minimum lease payments
2019		69,000
2020		69,000
2021		68,000
2022		44,000
2023		2,000
Thereafter		3,000
Total lease payments		255,000
Operating lease, rent expense		11,000	$ 11,000
Hawaiian Electric Company, Inc. and Subsidiaries | Other Operating Leases
Lessee, Lease, Description [Line Items]
Operating lease cost	4,955
Variable lease cost	10,272
Total lease cost	15,227
Cash paid for amounts included in the measurement of lease liabilities :
Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases	$ 5,768
Weighted-average remaining lease term—operating leases (in years)	4 years 6 months
Weighted-average discount rate—operating leases	4.11%
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2020	$ 7,000
2021	5,000
2022	3,000
2023	2,000
2024	1,000
Thereafter	2,000
Total lease payments	20,000
Less: Imputed interest	(2,000)
Total present value of lease payments1	18,000
Future minimum lease payments
2019		6,000
2020		6,000
2021		5,000
2022		2,000
2023		2,000
Thereafter		3,000
Total lease payments		24,000
Hawaiian Electric Company, Inc. and Subsidiaries | Power Purchase Agreements Qualifying As Operating Leases
Lessee, Lease, Description [Line Items]
Operating lease cost	63,319
Variable lease cost	192,138
Total lease cost	255,457
Cash paid for amounts included in the measurement of lease liabilities :
Cash paid for amounts included in the measurement of lease liabilities—Operating cash flows from operating leases	$ 62,594
Weighted-average remaining lease term—operating leases (in years)	2 years 9 months 18 days
Weighted-average discount rate—operating leases	4.08%
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2020	$ 63,000
2021	63,000
2022	42,000
2023	0
2024	0
Thereafter	0
Total lease payments	168,000
Less: Imputed interest	(9,000)
Total present value of lease payments1	$ 159,000
Future minimum lease payments
2019		63,000
2020		63,000
2021		63,000
2022		42,000
2023		0
Thereafter		0
Total lease payments		$ 231,000
Honolulu
Lessee, Lease, Description [Line Items]
Area of real estate property (in square feet) | ft²					195,000
Operating lease term					12 years
Operating lease renewal term (up to)					10 years
Honolulu | Subsequent Event
Lessee, Lease, Description [Line Items]
Operating lease, liability				$ 21,000
Honolulu | Office Space Lease, Phase 1, Commencement January 2020
Lessee, Lease, Description [Line Items]
Lease not yet commenced, annual rent expense					$ 1,900
Lease not yet commenced expected reimbursements for improvements					5,000
Honolulu | Office Space Lease, Phase 2, Commencement January 2021
Lessee, Lease, Description [Line Items]
Lease not yet commenced, annual rent expense					1,700
Lease not yet commenced liability					19,000
Lease not yet commenced expected reimbursements for improvements					$ 4,600

Revenues (Details)

Revenues (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue from Contract with Customer [Abstract]
General payment period									30 days
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									$ 2,622,025	$ 2,614,831
Revenue Not from Contract with Customer									252,576	246,018
Revenues	$ 725,966	$ 771,535	$ 715,485	$ 661,615	$ 761,650	$ 768,048	$ 685,277	$ 645,874	2,874,601	2,860,849	$ 2,555,625
Services/goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									46,659	47,300
Services/goods transferred over time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									2,575,366	2,567,531
Electric energy sales - residential
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									807,652	801,846
Electric energy sales - commercial
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									846,110	853,672
Electric energy sales - large light and power
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									905,308	894,770
Electric energy sales - other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									16,296	17,243
Bank fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									46,659	47,300
Regulatory revenue
Disaggregation of Revenue [Line Items]
Revenue Not from Contract with Customer									(54,101)	(37,687)
Bank interest and dividend income
Disaggregation of Revenue [Line Items]
Revenue Not from Contract with Customer									266,554	258,225
Other bank noninterest income
Disaggregation of Revenue [Line Items]
Revenue Not from Contract with Customer									15,357	8,750
Other
Disaggregation of Revenue [Line Items]
Revenue Not from Contract with Customer									24,766	16,730
Hawaiian Electric Company, Inc. and Subsidiaries
Disaggregation of Revenue [Line Items]
Revenue taxes, other than income tax expense									226,000	226,000	202,000
Revenue taxes accrued	$ 132,000				$ 130,000				132,000	130,000
Electric utility
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									2,575,366	2,567,531
Revenue Not from Contract with Customer									(29,424)	(21,006)
Revenues									2,545,942	2,546,525	2,257,566
Electric utility | Services/goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Electric utility | Services/goods transferred over time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									2,575,366	2,567,531
Electric utility | Electric energy sales - residential
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									807,652	801,846
Electric utility | Electric energy sales - commercial
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									846,110	853,672
Electric utility | Electric energy sales - large light and power
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									905,308	894,770
Electric utility | Electric energy sales - other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									16,296	17,243
Electric utility | Bank fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Electric utility | Regulatory revenue
Disaggregation of Revenue [Line Items]
Revenue Not from Contract with Customer									(54,101)	(37,687)
Electric utility | Bank interest and dividend income
Disaggregation of Revenue [Line Items]
Revenue Not from Contract with Customer									0	0
Electric utility | Other bank noninterest income
Disaggregation of Revenue [Line Items]
Revenue Not from Contract with Customer									0	0
Electric utility | Other
Disaggregation of Revenue [Line Items]
Revenue Not from Contract with Customer									24,677	16,681
Bank
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									46,659	47,300
Revenue Not from Contract with Customer									281,911	266,975
Revenues									328,570	314,275	297,640
Bank | Services/goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									46,659	47,300
Bank | Services/goods transferred over time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Bank | Electric energy sales - residential
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Bank | Electric energy sales - commercial
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Bank | Electric energy sales - large light and power
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Bank | Electric energy sales - other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Bank | Bank fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									46,659	47,300
Bank | Regulatory revenue
Disaggregation of Revenue [Line Items]
Revenue Not from Contract with Customer									0	0
Bank | Bank interest and dividend income
Disaggregation of Revenue [Line Items]
Revenue Not from Contract with Customer									266,554	258,225
Bank | Other bank noninterest income
Disaggregation of Revenue [Line Items]
Revenue Not from Contract with Customer									15,357	8,750
Bank | Other
Disaggregation of Revenue [Line Items]
Revenue Not from Contract with Customer									0	0
Other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Revenue Not from Contract with Customer									89	49
Revenues									89	49	$ 419
Other | Services/goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Other | Services/goods transferred over time
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Other | Electric energy sales - residential
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Other | Electric energy sales - commercial
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Other | Electric energy sales - large light and power
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Other | Electric energy sales - other
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Other | Bank fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers									0	0
Other | Regulatory revenue
Disaggregation of Revenue [Line Items]
Revenue Not from Contract with Customer									0	0
Other | Bank interest and dividend income
Disaggregation of Revenue [Line Items]
Revenue Not from Contract with Customer									0	0
Other | Other bank noninterest income
Disaggregation of Revenue [Line Items]
Revenue Not from Contract with Customer									0	0
Other | Other
Disaggregation of Revenue [Line Items]
Revenue Not from Contract with Customer									$ 89	$ 49

Retirement benefits - Additiona

Retirement benefits - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Vested percentage of interest of each affected participant after participating employer terminates participation	100.00%
Number of years for which regulatory asset/liability for each utility will be amortized, beginning with respective utility's next rate case	5 years
Executive life and nonqualified pension plan expenses	$ 1,100,000	$ 1,000,000
Regulatory asset charges pretax	$ (21,800,000)	11,200,000
Fair value of plan assets, valuation difference amortized in first year	0.00%
Fair value of plan assets, valuation difference amortized in two to five years	25.00%
Number of past years for adding or subtracting the unamortized differences from fair value	4 years
Percentage of range around fair value	15.00%
Expected cash funding for qualified defined benefit plans
Defined contribution plan, expenses recognized	$ 7,000,000	7,000,000	$ 7,000,000
Cash contributions by the employer to defined contribution plan	7,000,000	7,000,000	6,000,000
Hawaiian Electric Company, Inc. and Subsidiaries
Expected cash funding for qualified defined benefit plans
Defined contribution plan, expenses recognized	$ 3,000,000	2,000,000	2,000,000
Pension benefits
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on plan assets	7.25%
Discount rate	3.69%
Assumed discount rate, active manager premium	0.20%
Actual net return on plan assets	24.30%
Pension expense	$ 59,000,000	59,000,000	33,000,000
Expected cash funding for qualified defined benefit plans
Estimate of contributions to postretirement benefit plans in next fiscal year	69,000,000
Pension benefits | Hawaiian Electric Company, Inc. and Subsidiaries
Defined Benefit Plan Disclosure [Line Items]
Pension expense	57,000,000	$ 55,000,000	30,000,000
Expected cash funding for qualified defined benefit plans
Estimate of contributions to postretirement benefit plans in next fiscal year	$ 68,000,000
Other benefits
Defined Benefit Plan Disclosure [Line Items]
Assumed health care trend rate for medical in next fiscal year	7.00%	7.25%
Assumed health care trend rate for grading down plan in 12 fiscal years thereafter	5.00%
Assumed health care trend rate for dental in next fiscal year	5.00%	5.00%
Assumed health care trend rate for vision in next fiscal year	4.00%	4.00%
Assumed health care trend rate for grading down in 2028 and thereafter		5.00%
Postretirement benefits other than pension expense	$ (100,000)	$ 0	1,000,000
Expected cash funding for qualified defined benefit plans
Estimate of contributions to postretirement benefit plans in next fiscal year	0
2020	91,000,000
2021	95,000,000
2022	99,000,000
2023	103,000,000
2024	107,000,000
2025 through 2029	593,000,000
Other benefits | Hawaiian Electric Company, Inc. and Subsidiaries
Defined Benefit Plan Disclosure [Line Items]
Postretirement benefits other than pension expense	(300,000)	$ (100,000)	$ 800,000
Expected cash funding for qualified defined benefit plans
Estimate of contributions to postretirement benefit plans in next fiscal year	0
2020	84,000,000
2021	87,000,000
2022	90,000,000
2023	93,000,000
2024	97,000,000
2025 through 2029	$ 544,000,000
Minimum
Defined Benefit Plan Disclosure [Line Items]
Threshold percentage around fair value	85.00%
Maximum
Defined Benefit Plan Disclosure [Line Items]
Threshold percentage around fair value	115.00%

Retirement benefits - Changes i

Retirement benefits - Changes in Projected Benefit Obligations and Fair Value of Plan Assets and Amounts Recognized in OCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Hawaiian Electric Company, Inc. and Subsidiaries
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined benefit pension and other postretirement benefit plans liability				$ (478,763)	$ (503,659)
Pension benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation, balance at the beginning of the period	$ 1,991,384	$ 2,094,356
Service cost	62,135	68,987	$ 64,906
Interest cost	84,267	77,374	81,185
Actuarial losses (gains)	224,421	(171,226)
Participants contributions	0	0
Benefits paid and expenses	(83,924)	(78,107)
Benefit obligation, balance at the end of the period	2,278,283	1,991,384	2,094,356
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, balance at the beginning of the period	1,479,067	1,618,703
Actual return on plan assets	354,072	(101,406)
Employer contributions	48,629	38,496
Participants contributions	0	0
Benefits paid and expenses	(82,568)	(76,726)
Fair value of plan assets, balance at the end of the period	1,799,200	1,479,067	1,618,703
Accrued benefit asset (liability), balance				(479,083)	(512,317)
Other assets				19,396	10,930
Defined benefit pension and other postretirement benefit plans liability				(498,479)	(523,247)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income [Roll Forward]
AOCI debit/(credit), balance at beginning of the period (excluding impact of PUC D&Os)	536,920	527,830
Recognized during year – prior service credit	42	42
Recognized during year – net actuarial (losses) gains	(15,479)	(30,084)
Occurring during year – net actuarial losses (gains)	(17,662)	39,132
AOCI debit/(credit), balance at end of the period (excluding impact of PUC D&Os)	503,821	536,920	527,830
Cumulative impact of PUC D&Os				(474,628)	(498,944)
AOCI debit/(credit), balance at end of the period				29,193	37,976
Net actuarial loss				503,813	536,954
Prior service cost (gain)				8	(34)
AOCI debit/(credit), balance at end of the period (excluding impact of PUC D&Os)	536,920	536,920	527,830	503,821	536,920
Income taxes (benefits)				(7,677)	(10,023)
AOCI debit/(credit), net of taxes (benefits) balance at the end of the period				21,516	27,953
Pension benefits | Hawaiian Electric Company, Inc. and Subsidiaries
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation, balance at the beginning of the period	1,837,653	1,928,648
Service cost	60,461	67,359	63,059
Interest cost	77,851	71,294	74,632
Actuarial losses (gains)	212,310	(158,258)
Participants contributions	0	0
Benefits paid and expenses	(77,060)	(71,535)
Transfers	(311)	145
Benefit obligation, balance at the end of the period	2,110,904	1,837,653	1,928,648
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, balance at the beginning of the period	1,343,113	1,468,403
Actual return on plan assets	326,204	(91,836)
Employer contributions	47,808	37,550
Participants contributions	0	0
Benefits paid and expenses	(76,581)	(71,060)
Other	(127)	56
Fair value of plan assets, balance at the end of the period	1,640,417	1,343,113	1,468,403
Accrued benefit asset (liability), balance				(470,487)	(494,540)
Other liabilities (short-term)				(518)	(512)
Defined benefit pension and other postretirement benefit plans liability				(469,969)	(494,028)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income [Roll Forward]
AOCI debit/(credit), balance at beginning of the period (excluding impact of PUC D&Os)	502,189	493,464
Recognized during year – prior service credit	(7)	(8)
Recognized during year – net actuarial (losses) gains	(14,658)	(27,302)
Occurring during year – net actuarial losses (gains)	(9,446)	36,035
AOCI debit/(credit), balance at end of the period (excluding impact of PUC D&Os)	478,078	502,189	493,464
Cumulative impact of PUC D&Os				(474,628)	(498,944)
AOCI debit/(credit), balance at end of the period				3,450	3,245
Net actuarial loss				478,069	502,173
Prior service cost (gain)				9	16
AOCI debit/(credit), balance at end of the period (excluding impact of PUC D&Os)	478,078	502,189	493,464	478,078	502,189
Income taxes (benefits)				(888)	(836)
AOCI debit/(credit), net of taxes (benefits) balance at the end of the period				2,562	2,409
Other benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation, balance at the beginning of the period	188,666	212,601
Service cost	2,209	2,721	3,374
Interest cost	8,004	7,933	9,453
Actuarial losses (gains)	25,998	(25,977)
Participants contributions	2,351	2,505
Benefits paid and expenses	(11,589)	(11,117)
Benefit obligation, balance at the end of the period	215,639	188,666	212,601
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, balance at the beginning of the period	173,693	193,995
Actual return on plan assets	35,525	(11,846)
Employer contributions	0	0
Participants contributions	2,351	2,505
Benefits paid and expenses	(10,738)	(10,961)
Fair value of plan assets, balance at the end of the period	200,831	173,693	193,995
Accrued benefit asset (liability), balance				(14,808)	(14,973)
Other assets				0	0
Defined benefit pension and other postretirement benefit plans liability				(14,808)	(14,973)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income [Roll Forward]
AOCI debit/(credit), balance at beginning of the period (excluding impact of PUC D&Os)	1,962	1,474
Recognized during year – prior service credit	1,806	1,805
Recognized during year – net actuarial (losses) gains	13	(95)
Occurring during year – net actuarial losses (gains)	2,829	(1,222)
AOCI debit/(credit), balance at end of the period (excluding impact of PUC D&Os)	6,610	1,962	1,474
Cumulative impact of PUC D&Os				(7,458)	(4,929)
AOCI debit/(credit), balance at end of the period				(848)	(2,967)
Net actuarial loss				11,707	8,865
Prior service cost (gain)				(5,097)	(6,903)
AOCI debit/(credit), balance at end of the period (excluding impact of PUC D&Os)	6,610	1,474	1,474	6,610	1,962
Income taxes (benefits)				219	765
AOCI debit/(credit), net of taxes (benefits) balance at the end of the period				(629)	(2,202)
Other benefits | Hawaiian Electric Company, Inc. and Subsidiaries
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation, balance at the beginning of the period	181,162	204,644
Service cost	2,191	2,704	3,353
Interest cost	7,673	7,628	9,115
Actuarial losses (gains)	25,123	(25,330)
Participants contributions	2,311	2,472
Benefits paid and expenses	(11,382)	(10,958)
Transfers	(5)	2
Benefit obligation, balance at the end of the period	207,073	181,162	204,644
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, balance at the beginning of the period	170,862	190,814
Actual return on plan assets	34,928	(11,625)
Employer contributions	0	0
Participants contributions	2,311	2,472
Benefits paid and expenses	(10,532)	(10,801)
Other	(5)	2
Fair value of plan assets, balance at the end of the period	197,564	170,862	190,814
Accrued benefit asset (liability), balance				(9,509)	(10,300)
Other liabilities (short-term)				(715)	(669)
Defined benefit pension and other postretirement benefit plans liability				(8,794)	(9,631)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income [Roll Forward]
AOCI debit/(credit), balance at beginning of the period (excluding impact of PUC D&Os)	1,551	839
Recognized during year – prior service credit	1,803	1,803
Recognized during year – net actuarial (losses) gains	0	(98)
Occurring during year – net actuarial losses (gains)	2,376	(993)
AOCI debit/(credit), balance at end of the period (excluding impact of PUC D&Os)	5,730	1,551	839
Cumulative impact of PUC D&Os				(7,458)	(4,929)
AOCI debit/(credit), balance at end of the period				(1,728)	(3,378)
Net actuarial loss				10,815	8,439
Prior service cost (gain)				(5,085)	(6,888)
AOCI debit/(credit), balance at end of the period (excluding impact of PUC D&Os)	$ 5,730	$ 839	$ 839	5,730	1,551
Income taxes (benefits)				445	870
AOCI debit/(credit), net of taxes (benefits) balance at the end of the period				$ (1,283)	$ (2,508)

Retirement benefits - Asset All

Retirement benefits - Asset Allocation Target and Actual Percentage (Details)	Dec. 31, 2019	Dec. 31, 2018
Pension benefits
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	100.00%	100.00%
Asset category, Target
Target	100.00%
Pension benefits | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	71.00%	69.00%
Asset category, Target
Target	70.00%
Pension benefits | Equity securities | Minimum
Asset category, Target
Target	65.00%
Pension benefits | Equity securities | Maximum
Asset category, Target
Target	75.00%
Pension benefits | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	29.00%	31.00%
Asset category, Target
Target	30.00%
Pension benefits | Fixed income securities | Minimum
Asset category, Target
Target	25.00%
Pension benefits | Fixed income securities | Maximum
Asset category, Target
Target	35.00%
Other benefits
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	100.00%	100.00%
Asset category, Target
Target	100.00%
Other benefits | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	71.00%	70.00%
Asset category, Target
Target	70.00%
Other benefits | Equity securities | Minimum
Asset category, Target
Target	65.00%
Other benefits | Equity securities | Maximum
Asset category, Target
Target	75.00%
Other benefits | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Actual asset allocation	29.00%	30.00%
Asset category, Target
Target	30.00%
Other benefits | Fixed income securities | Minimum
Asset category, Target
Target	25.00%
Other benefits | Fixed income securities | Maximum
Asset category, Target
Target	35.00%

Retirement benefits - Assets He

Retirement benefits - Assets Held In Retirement Benefit Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension benefits
Fair value measurements on a recurring basis
Fair value of plan assets	$ 1,799,200	$ 1,479,067	$ 1,618,703
Other benefits
Fair value measurements on a recurring basis
Fair value of plan assets	200,831	173,693	$ 193,995
Fair value measurements on a recurring basis | Pension benefits
Fair value measurements on a recurring basis
Fair value of plan assets	1,799,000	1,479,000
Fair value measurements on a recurring basis | Pension benefits | Total, excluding cash, receivables and payables, net
Fair value measurements on a recurring basis
Fair value of plan assets	1,795,000	1,474,000
Fair value measurements on a recurring basis | Pension benefits | Equity investments
Fair value measurements on a recurring basis
Fair value of plan assets	$ 1,158,000	$ 920,000
Fair value measurements on a recurring basis | Pension benefits | Non-U.S. Equity Funds
Fair value measurements on a recurring basis
Redemption frequency, daily	60.00%	32.00%
Redemption frequency, monthly	40.00%	68.00%
Fair value measurements on a recurring basis | Pension benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	$ 598,000	$ 518,000
Fair value measurements on a recurring basis | Pension benefits | Cash, receivables and payables, net
Fair value measurements on a recurring basis
Fair value of plan assets	4,000	5,000
Fair value measurements on a recurring basis | Other benefits
Fair value measurements on a recurring basis
Fair value of plan assets	201,000	174,000
Fair value measurements on a recurring basis | Other benefits | Total, excluding cash, receivables and payables, net
Fair value measurements on a recurring basis
Fair value of plan assets	201,000	173,000
Fair value measurements on a recurring basis | Other benefits | Equity investments
Fair value measurements on a recurring basis
Fair value of plan assets	$ 141,000	$ 117,000
Fair value measurements on a recurring basis | Other benefits | Non-U.S. Equity Funds
Fair value measurements on a recurring basis
Redemption frequency, daily	59.00%	27.00%
Redemption frequency, monthly	41.00%	73.00%
Fair value measurements on a recurring basis | Other benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	$ 56,000	$ 51,000
Fair value measurements on a recurring basis | Other benefits | Cash, receivables and payables, net
Fair value measurements on a recurring basis
Fair value of plan assets	0	1,000
Fair value measurements on a recurring basis | Fair Value, Inputs, Level 1, 2 and 3 | Pension benefits | Equity securities
Fair value measurements on a recurring basis
Fair value of plan assets	470,000	507,000
Fair value measurements on a recurring basis | Fair Value, Inputs, Level 1, 2 and 3 | Pension benefits | Equity index and exchange-traded funds
Fair value measurements on a recurring basis
Fair value of plan assets	610,000	348,000
Fair value measurements on a recurring basis | Fair Value, Inputs, Level 1, 2 and 3 | Pension benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	353,000	310,000
Fair value measurements on a recurring basis | Fair Value, Inputs, Level 1, 2 and 3 | Other benefits | Equity securities
Fair value measurements on a recurring basis
Fair value of plan assets	61,000	65,000
Fair value measurements on a recurring basis | Fair Value, Inputs, Level 1, 2 and 3 | Other benefits | Equity index and exchange-traded funds
Fair value measurements on a recurring basis
Fair value of plan assets	69,000	42,000
Fair value measurements on a recurring basis | Fair Value, Inputs, Level 1, 2 and 3 | Other benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	52,000	47,000
Fair value measurements on a recurring basis | Level 1 | Pension benefits | Total, excluding cash, receivables and payables, net
Fair value measurements on a recurring basis
Fair value of plan assets	1,203,000	978,000
Fair value measurements on a recurring basis | Level 1 | Pension benefits | Equity investments
Fair value measurements on a recurring basis
Fair value of plan assets	1,080,000	855,000
Fair value measurements on a recurring basis | Level 1 | Pension benefits | Equity securities
Fair value measurements on a recurring basis
Fair value of plan assets	470,000	507,000
Fair value measurements on a recurring basis | Level 1 | Pension benefits | Equity index and exchange-traded funds
Fair value measurements on a recurring basis
Fair value of plan assets	610,000	348,000
Fair value measurements on a recurring basis | Level 1 | Pension benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	123,000	123,000
Fair value measurements on a recurring basis | Level 1 | Other benefits | Total, excluding cash, receivables and payables, net
Fair value measurements on a recurring basis
Fair value of plan assets	179,000	152,000
Fair value measurements on a recurring basis | Level 1 | Other benefits | Equity investments
Fair value measurements on a recurring basis
Fair value of plan assets	130,000	107,000
Fair value measurements on a recurring basis | Level 1 | Other benefits | Equity securities
Fair value measurements on a recurring basis
Fair value of plan assets	61,000	65,000
Fair value measurements on a recurring basis | Level 1 | Other benefits | Equity index and exchange-traded funds
Fair value measurements on a recurring basis
Fair value of plan assets	69,000	42,000
Fair value measurements on a recurring basis | Level 1 | Other benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	49,000	45,000
Fair value measurements on a recurring basis | Level 2 | Pension benefits | Total, excluding cash, receivables and payables, net
Fair value measurements on a recurring basis
Fair value of plan assets	230,000	187,000
Fair value measurements on a recurring basis | Level 2 | Pension benefits | Equity investments
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 2 | Pension benefits | Equity securities
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 2 | Pension benefits | Equity index and exchange-traded funds
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 2 | Pension benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	230,000	187,000
Fair value measurements on a recurring basis | Level 2 | Other benefits | Total, excluding cash, receivables and payables, net
Fair value measurements on a recurring basis
Fair value of plan assets	2,000	2,000
Fair value measurements on a recurring basis | Level 2 | Other benefits | Equity investments
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 2 | Other benefits | Equity securities
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 2 | Other benefits | Equity index and exchange-traded funds
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 2 | Other benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	2,000	2,000
Fair value measurements on a recurring basis | Level 3 | Pension benefits | Total, excluding cash, receivables and payables, net
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 3 | Pension benefits | Equity investments
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 3 | Pension benefits | Equity securities
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 3 | Pension benefits | Equity index and exchange-traded funds
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 3 | Pension benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 3 | Other benefits | Total, excluding cash, receivables and payables, net
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 3 | Other benefits | Equity investments
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 3 | Other benefits | Equity securities
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 3 | Other benefits | Equity index and exchange-traded funds
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Level 3 | Other benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	0	0
Fair value measurements on a recurring basis | Net Asset Value | Pension benefits
Fair value measurements on a recurring basis
Fair value of plan assets	362,000	309,000
Fair value measurements on a recurring basis | Net Asset Value | Pension benefits | Equity investments
Fair value measurements on a recurring basis
Fair value of plan assets	78,000	65,000
Fair value measurements on a recurring basis | Net Asset Value | Pension benefits | Non-U.S. Equity Funds
Fair value measurements on a recurring basis
Fair value of plan assets	$ 78,000	$ 65,000
Fair value measurements on a recurring basis | Net Asset Value | Pension benefits | Non-U.S. Equity Funds | Minimum
Fair value measurements on a recurring basis
Redemption notice period (in days)	5 days	5 days
Fair value measurements on a recurring basis | Net Asset Value | Pension benefits | Non-U.S. Equity Funds | Maximum
Fair value measurements on a recurring basis
Redemption notice period (in days)	30 days	30 days
Fair value measurements on a recurring basis | Net Asset Value | Pension benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	$ 245,000	$ 208,000
Redemption notice period (in days)	15 days	15 days
Fair value measurements on a recurring basis | Net Asset Value | Pension benefits | Cash equivalents
Fair value measurements on a recurring basis
Fair value of plan assets	$ 39,000	$ 36,000
Fair value measurements on a recurring basis | Net Asset Value | Pension benefits | Cash equivalents | Minimum
Fair value measurements on a recurring basis
Redemption notice period (in days)	0 days	0 days
Fair value measurements on a recurring basis | Net Asset Value | Pension benefits | Cash equivalents | Maximum
Fair value measurements on a recurring basis
Redemption notice period (in days)	1 day	1 day
Fair value measurements on a recurring basis | Net Asset Value | Other benefits
Fair value measurements on a recurring basis
Fair value of plan assets	$ 19,000	$ 19,000
Fair value measurements on a recurring basis | Net Asset Value | Other benefits | Equity investments
Fair value measurements on a recurring basis
Fair value of plan assets	11,000	10,000
Fair value measurements on a recurring basis | Net Asset Value | Other benefits | Non-U.S. Equity Funds
Fair value measurements on a recurring basis
Fair value of plan assets	$ 11,000	$ 10,000
Fair value measurements on a recurring basis | Net Asset Value | Other benefits | Non-U.S. Equity Funds | Minimum
Fair value measurements on a recurring basis
Redemption notice period (in days)	5 days	5 days
Fair value measurements on a recurring basis | Net Asset Value | Other benefits | Non-U.S. Equity Funds | Maximum
Fair value measurements on a recurring basis
Redemption notice period (in days)	30 days	30 days
Fair value measurements on a recurring basis | Net Asset Value | Other benefits | Fixed income securities
Fair value measurements on a recurring basis
Fair value of plan assets	$ 4,000	$ 4,000
Redemption notice period (in days)	15 days	10 days
Fair value measurements on a recurring basis | Net Asset Value | Other benefits | Cash equivalents
Fair value measurements on a recurring basis
Fair value of plan assets	$ 4,000	$ 5,000
Fair value measurements on a recurring basis | Net Asset Value | Other benefits | Cash equivalents | Minimum
Fair value measurements on a recurring basis
Redemption notice period (in days)	0 days	0 days
Fair value measurements on a recurring basis | Net Asset Value | Other benefits | Cash equivalents | Maximum
Fair value measurements on a recurring basis
Redemption notice period (in days)	1 day	1 day

Retirement benefits - Weighted

Retirement benefits - Weighted Average Assumptions (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Benefit obligation
Rate of compensation increase	3.50%	3.50%	3.50%
Net periodic pension/benefit cost (years ended)
Rate of compensation increase	3.50%	3.50%	3.50%
Pension benefits
Benefit obligation
Discount rate	3.61%	4.31%	3.74%
Net periodic pension/benefit cost (years ended)
Discount rate	4.31%	3.74%	4.26%
Expected return on plan assets	7.25%	7.50%	7.50%
Pension benefits | American Savings Bank (ASB)
Net periodic pension/benefit cost (years ended)
Expected return on plan assets	4.51%	3.94%	4.46%
Other benefits
Benefit obligation
Discount rate	3.52%	4.34%	3.72%
Net periodic pension/benefit cost (years ended)
Discount rate	4.34%	3.72%	4.22%
Expected return on plan assets	7.25%	7.50%	7.50%

Retirement benefits - Component

Retirement benefits - Components of NPPC and NPBC (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension benefits
Defined benefit plans
Service cost	$ 62,135	$ 68,987	$ 64,906
Interest cost	84,267	77,374	81,185
Expected return on plan assets	(111,989)	(108,953)	(102,745)
Amortization of net prior service gain	(42)	(42)	(55)
Amortization of net actuarial losses	15,479	30,084	26,496
Net periodic pension/benefit cost	49,850	67,450	69,787
Impact of PUC D&Os	48,143	25,828	(18,004)
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os)	97,993	93,278	51,783
Pension benefits | Hawaiian Electric Company, Inc. and Subsidiaries
Defined benefit plans
Service cost	60,461	67,359	63,059
Interest cost	77,851	71,294	74,632
Expected return on plan assets	(104,632)	(102,368)	(95,892)
Amortization of net prior service gain	7	8	8
Amortization of net actuarial losses	14,658	27,302	24,392
Net periodic pension/benefit cost	48,345	63,595	66,199
Impact of PUC D&Os	48,143	25,828	(18,004)
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os)	96,488	89,423	48,195
Other benefits
Defined benefit plans
Service cost	2,209	2,721	3,374
Interest cost	8,004	7,933	9,453
Expected return on plan assets	(12,356)	(12,908)	(12,326)
Amortization of net prior service gain	(1,806)	(1,805)	(1,793)
Amortization of net actuarial losses	(13)	95	1,130
Net periodic pension/benefit cost	(3,962)	(3,964)	(162)
Impact of PUC D&Os	3,258	3,842	1,211
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os)	(704)	(122)	1,049
Other benefits | Hawaiian Electric Company, Inc. and Subsidiaries
Defined benefit plans
Service cost	2,191	2,704	3,353
Interest cost	7,673	7,628	9,115
Expected return on plan assets	(12,180)	(12,713)	(12,147)
Amortization of net prior service gain	(1,803)	(1,803)	(1,804)
Amortization of net actuarial losses	0	98	1,102
Net periodic pension/benefit cost	(4,119)	(4,086)	(381)
Impact of PUC D&Os	3,258	3,842	1,211
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os)	$ (861)	$ (244)	$ 830

Retirement benefits - ABO and P

Retirement benefits - ABO and PBO in Excess of Plan Assets (Details) - Pension benefits - USD ($) $ in Billions	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plans - ABOs	$ 2	$ 1.7
Defined benefit plans with ABO in excess of plan assets
ABOs	1.9	1.6
Fair value of plan assets	1.7	1.4
Defined benefit plans with PBOs in excess of plan assets
PBOs	2.2	1.9
Fair value of plan assets	1.7	1.4
Hawaiian Electric Company, Inc. and Subsidiaries
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plans - ABOs	1.8	1.6
Defined benefit plans with ABO in excess of plan assets
ABOs	1.8	1.6
Fair value of plan assets	1.6	1.3
Defined benefit plans with PBOs in excess of plan assets
PBOs	2.1	1.8
Fair value of plan assets	$ 1.6	$ 1.3

Share-based compensation - Addi

Share-based compensation - Additional Information (Details) $ in Millions	Jun. 26, 2019shares	Mar. 01, 2014shares	Dec. 31, 2019USD ($)incrementshares	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Share-based compensation
Share-based compensation expense			$ 10	$ 7.8	$ 5.4
Income tax benefit			$ 1.4	1.1	1.9
Long-term incentive plan (LTIP)
Share-based compensation
Performance period			3 years
Exception to forfeiture, minimum requisite service period			12 months
Payout low end of range			0.00%
Payout high end of range			200.00%
Restricted stock units
Share-based compensation
Fair value of vested stock			$ 3.2	2.7	3.5
Income tax benefit			0.5	$ 0.4	1.1
Unrecognized compensation cost			$ 4.8
Weighted-average period over which unrecognized compensation cost expected to be recognized			2 years 6 months
LTIP linked to TRS
Share-based compensation
Fair value of vested stock					1.9
Income tax benefit					0.7
Unrecognized compensation cost			$ 1.4
Weighted-average period over which unrecognized compensation cost expected to be recognized			1 year 6 months
LTIP awards linked to other performance conditions
Share-based compensation
Fair value of vested stock					4.2
Income tax benefit					$ 1.6
Unrecognized compensation cost			$ 5.1
Weighted-average period over which unrecognized compensation cost expected to be recognized			1 year 6 months
Equity and Incentive Plan (EIP)
Share-based compensation
Additional shares available for issuance | shares		1,500,000
Shares remaining available for future issuance | shares			3,200,000
Shares that can be issued upon vesting of outstanding units and achievement of performance goals | shares			700,000
Equity and Incentive Plan (EIP) | Restricted shares
Share-based compensation
The number of equal annual increments for which the awards become unrestricted (in installments) | increment			4
Nonemployee Director Stock Plan
Share-based compensation
Additional shares available for issuance | shares	300,000
Shares remaining available for future issuance | shares			310,263

Share-based compensation - Rela

Share-based compensation - Related Income Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 10	$ 7.8	$ 5.4
Income tax benefit	1.4	1.1	1.9
Hawaiian Electric Company, Inc. and Subsidiaries
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	3.2	2.7	1.9
Income tax benefit	$ 0.6	$ 0.5	$ 0.7

Share-based compensation - The

Share-based compensation - The 2011 Director Plan (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Income tax benefit	$ 1.4	$ 1.1	$ 1.9
Common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	36,344	38,821	35,770
Fair value of vested stock	$ 1.6	$ 1.3	$ 1.2
Income tax benefit	$ 0.4	$ 0.3	$ 0.5

Share-based compensation - Rest

Share-based compensation - Restricted Stock Units (Details) - Restricted stock units - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation, Restricted Shares [Roll Forward]
Outstanding, beginning of period (in shares)	200,358	197,047	220,683
Granted (in shares)	96,565	93,853	97,873
Vested (in shares)	(76,813)	(75,683)	(92,147)
Forfeited (in shares)	(12,469)	(14,859)	(29,362)
Outstanding, end of period (in shares)	207,641	200,358	197,047
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding, beginning of period (in dollars per share)	$ 33.05	$ 31.53	$ 29.57
Granted (in dollars per share)	37.82	34.12	33.47
Vested (in dollars per share)	32.61	30.56	28.88
Forfeited (in dollars per share)	34.20	32.35	31.57
Outstanding, end of period (in dollars per share)	$ 35.36	$ 33.05	$ 31.53
Total weighted-average grant-date fair value	$ 3.7	$ 3.2	$ 3.3

Share-based compensation - LTIP

Share-based compensation - LTIP Linked to TRS (Details) - LTIP linked to TRS - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation, Restricted Shares [Roll Forward]
Outstanding, beginning of period (in shares)	65,578	32,904	83,106
Granted (in shares)	35,215	37,832	37,204
Vested (issued or unissued and cancelled) (in shares)	0	0	(83,106)
Forfeited (in shares)	(4,391)	(5,158)	(4,300)
Outstanding, end of period (in shares)	96,402	65,578	32,904
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding, beginning of period (in dollars per share)	$ 38.81	$ 39.51	$ 22.95
Granted (in dollars per share)	41.07	38.21	39.51
Vested (issued or unissued and cancelled) (in dollars per share)	0	0	22.95
Forfeited (in dollars per share)	39.19	38.84	39.51
Outstanding, end of period (in dollars per share)	$ 39.62	$ 38.81	$ 39.51
Total weighted-average grant-date fair value	$ 1.4	$ 1.4	$ 1.5

Share-based compensation - Assu

Share-based compensation - Assumptions to Determine the Fair Value of LTIP Awards Linked to TRS (Details) - LTIP linked to TRS - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	2.48%	2.29%	1.46%
Expected life (in years)	3 years	3 years	3 years
Expected volatility	15.80%	17.00%	20.10%
Range of expected volatility for Peer Group, minimum	15.00%	15.10%	15.40%
Range of expected volatility for Peer Group, maximum	73.20%	26.20%	26.00%
Grant date fair value (in dollars per share)	$ 41.07	$ 38.20	$ 39.51

Share-based compensation - LT_2

Share-based compensation - LTIP Awards Linked To Other Performance Conditions (Details) - LTIP awards linked to other performance conditions - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation, Restricted Shares [Roll Forward]
Outstanding, beginning of period (in shares)	276,169	131,616	109,816
Granted (in shares)	140,855	151,328	148,818
Vested (in shares)	0	0	(109,816)
Increased above target (cancelled) (in shares)	4,314	13,858	0
Forfeited (in shares)	(17,570)	(20,633)	(17,202)
Outstanding, end of period (in shares)	403,768	276,169	131,616
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding, beginning of period (in dollars per share)	$ 33.80	$ 33.47	$ 25.18
Granted (in dollars per share)	37.78	34.12	33.47
Vested (in dollars per share)	0	0	25.18
Increased above target (cancelled) (in dollars per share)	33.53	33.49	0
Forfeited (in dollars per share)	34.66	33.80	33.48
Outstanding, end of period (in dollars per share)	$ 35.15	$ 33.80	$ 33.47
Total weighted-average grant-date fair value	$ 5.3	$ 5.2	$ 5

Income taxes - Components of In

Income taxes - Components of Income Taxes Attributable to Net Income for Common Stock (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Federal
Current	$ 28,736	$ 42,903	$ 61,534
Deferred	(4,353)	(6,099)	33,967
Deferred tax credits, net	13,410	(12)	(20)
Federal taxes	37,793	36,792	95,481
State
Current	10,472	17,361	10,076
Deferred	(10,732)	(3,269)	3,868
Deferred tax credits, net	14,104	(87)	(32)
State taxes	13,844	14,005	13,912
Federal and state taxes	51,637	50,797	109,393
Hawaiian Electric Company, Inc. and Subsidiaries
Federal
Current	21,751	29,649	36,267
Deferred	(7,793)	(5,245)	35,229
Deferred tax credits, net	13,155	(12)	(20)
Federal taxes	27,113	24,392	71,476
State
Current	5,579	13,210	8,947
Deferred	(8,491)	(2,737)	2,808
Deferred tax credits, net	14,104	(87)	(32)
State taxes	11,192	10,386	11,723
Federal and state taxes	$ 38,305	$ 34,778	$ 83,199

Income taxes - Income Tax Recon

Income taxes - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Expense (Benefit) [Line Items]
Amount at the federal statutory income tax rate	$ 56,996	$ 53,437	$ 96,796
Increase (decrease) resulting from:
State income taxes, net of federal income tax benefit	11,658	11,832	9,789
Net deferred tax asset (liability) adjustment related to the Tax Act	(9,255)	(9,540)	13,420
Other, net	(7,762)	(4,932)	(10,612)
Federal and state taxes	$ 51,637	$ 50,797	$ 109,393
Effective income tax rate	19.00%	20.00%	39.60%
Hawaiian Electric Company, Inc. and Subsidiaries
Income Tax Expense (Benefit) [Line Items]
Amount at the federal statutory income tax rate	$ 41,399	$ 37,889	$ 71,801
Increase (decrease) resulting from:
State income taxes, net of federal income tax benefit	8,703	8,080	7,584
Net deferred tax asset (liability) adjustment related to the Tax Act	(9,255)	(9,285)	9,168
Other, net	(2,542)	(1,906)	(5,354)
Federal and state taxes	$ 38,305	$ 34,778	$ 83,199
Effective income tax rate	19.40%	19.30%	40.60%

Income taxes - Deferred Tax Ass

Income taxes - Deferred Tax Assets and Liabilities Due to Book/Tax Differences (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets
Regulatory liabilities, excluding amounts attributable to property, plant and equipment	$ 100,427	$ 104,868
Operating lease liabilities	51,573
Allowance for bad debts	14,858	14,647
Other	54,028	46,036
Total deferred tax assets	220,886	165,551
Deferred tax liabilities
Property, plant and equipment related	464,312	437,644
Operating lease right-of-use assets	51,542
Regulatory assets, excluding amounts attributable to property, plant and equipment	33,897	37,345
Deferred RAM and RBA revenues	0	11,278
Retirement benefits	9,684	20,173
Other	40,776	31,629
Total deferred tax liabilities	600,211	538,069
Net deferred income tax liability	379,325	372,518
Deferred tax assets, tax credit carryforwards	8,700
Hawaiian Electric Company, Inc. and Subsidiaries
Deferred tax assets
Regulatory liabilities, excluding amounts attributable to property, plant and equipment	100,427	104,868
Operating lease liabilities	45,608
Allowance for bad debts	560	659
Other	41,181	26,522
Total deferred tax assets	187,776	132,049
Deferred tax liabilities
Property, plant and equipment related	458,349	434,831
Operating lease right-of-use assets	45,608
Regulatory assets, excluding amounts attributable to property, plant and equipment	33,897	37,345
Deferred RAM and RBA revenues	0	11,278
Retirement benefits	13,072	25,430
Other	14,001	6,362
Total deferred tax liabilities	564,927	515,246
Net deferred income tax liability	377,151	$ 383,197
Deferred tax assets, tax credit carryforwards	6,700
State and Local Jurisdiction
Deferred tax liabilities
Tax credit carryforward	11,700
State and Local Jurisdiction | Hawaiian Electric Company, Inc. and Subsidiaries
Deferred tax liabilities
Tax credit carryforward	$ 9,000

Income taxes - Additional Infor

Income taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Expense (Benefit) [Line Items]
Deferred tax assets, valuation allowance	$ 0	$ 0
Unrecognized tax benefits that would impact effective tax rate	500,000	500,000
Credit adjustments to interest expense on income taxes	100,000	(100,000)	$ 200,000
Amount of accrued interest related to uncertain tax positions	$ 600,000	400,000
Tax cuts and jobs act, net tax expense			$ 13,400,000
Tax cuts and jobs act, measurement period adjustment, decrease in DTL		13,900,000
Tax cuts and jobs act, measurement period adjustment, income tax benefit		5,500,000
Tax cust and jobs act, increase in regulatory liabilities		$ 11,300,000
Effective income tax rate, before tax act adjustments		22.10%
Effective income tax rate	19.00%	20.00%	39.60%
Hawaiian Electric Company, Inc. and Subsidiaries
Income Tax Expense (Benefit) [Line Items]
Unrecognized tax benefits that would impact effective tax rate	$ 0	$ 0
Credit adjustments to interest expense on income taxes	100,000	100,000	$ 100,000
Amount of accrued interest related to uncertain tax positions	$ 400,000	300,000
Tax cuts and jobs act, net tax expense			$ 9,200,000
Tax cuts and jobs act, measurement period adjustment, decrease in DTL		13,600,000
Tax cuts and jobs act, measurement period adjustment, income tax benefit		$ 5,200,000
Effective income tax rate, before tax act adjustments		22.20%
Effective income tax rate	19.40%	19.30%	40.60%

Income taxes - Changes in Unrec

Income taxes - Changes in Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Changes in total unrecognized tax benefits
Unrecognized tax benefits, at the beginning of the period	$ 2.1	$ 4	$ 3.8
Additions based on tax positions taken during the year	0.5	0.3	0.9
Reductions based on tax positions taken during the year	0	0	(0.2)
Additions for tax positions of prior years	0.1	0.1	0
Reductions for tax positions of prior years	(0.2)	(0.1)	(0.5)
Lapses of statute of limitations	(0.3)	(2.2)	0
Unrecognized tax benefits, at the end of the period	2.2	2.1	4
Hawaiian Electric Company, Inc. and Subsidiaries
Changes in total unrecognized tax benefits
Unrecognized tax benefits, at the beginning of the period	1.6	3.5	3.8
Additions based on tax positions taken during the year	0.5	0.3	0.4
Reductions based on tax positions taken during the year	0	0	(0.2)
Additions for tax positions of prior years	0.1	0.1	0
Reductions for tax positions of prior years	(0.2)	(0.1)	(0.5)
Lapses of statute of limitations	(0.3)	(2.2)	0
Unrecognized tax benefits, at the end of the period	$ 1.7	$ 1.6	$ 3.5

Cash flows (Details)

Cash flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental disclosures of cash flow information
Interest paid to non-affiliates, net of amounts capitalized	$ 107,000	$ 102,000	$ 83,000
Income taxes paid (including refundable credits)	56,000	72,000	55,000
Income taxes refunded (including refundable credits)	4,000	34,000	1,000
Supplemental disclosures of noncash activities
Unpaid invoices and accruals for capital expenditures (investing), Balance, end of period	64,000	59,000	38,000
Loans transferred from held for investment to held for sale (investing)	0	1,000	41,000
Common stock issued (gross) for director and executive/management compensation (financing)	5,000	4,000	11,000
Obligations to fund low income housing investments, net (investing)	11,000	12,000	13,000
Transfer of retail repurchase agreements to deposit liabilities (financing)	0	102,000	0
Hawaiian Electric Company, Inc. and Subsidiaries
Supplemental disclosures of cash flow information
Interest paid to non-affiliates, net of amounts capitalized	68,000	73,000	63,000
Income taxes paid (including refundable credits)	55,000	64,000	26,000
Income taxes refunded (including refundable credits)	4,000	31,000	0
Supplemental disclosures of noncash activities
Unpaid invoices and accruals for capital expenditures (investing), Balance, end of period	62,000	44,000	38,000
Estimated fair value of noncash contributions in aid of construction (investing)	9,000	14,000	18,000
Acquisition of Hawaiian Telcom’s interest in joint poles (investing)	$ 0	$ 48	$ 0

Regulatory restrictions on ne_2

Regulatory restrictions on net assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Regulatory restrictions on net assets
Distribution restrictions, percent of earnings in current year and 5 preceding years if capitalization rate is less than 35%	80.00%
Total capitalization rate of HEI's electric utility subsidiaries	56.00%
Common stock equity	$ 2,280,260	$ 2,162,280	$ 2,097,386	$ 2,066,753
Hawaiian Electric Company, Inc. and Subsidiaries
Regulatory restrictions on net assets
Restrictions on transfer of net assets to the parent in the form of cash dividends, loans and advances	825,000
Hawaiian Electric Company, Inc. and Subsidiaries
Regulatory restrictions on net assets
Common stock equity	2,047,352	1,957,641	$ 1,845,283	$ 1,799,787
American Savings Bank (ASB)
Regulatory restrictions on net assets
Common stock equity	699,051	$ 634,389
Restrictions on transfer of net assets to the parent in the form of cash dividends, loans and advances	$ 487,000

Significant group concentrati_2

Significant group concentrations of credit risk (Details)	12 Months Ended
	Dec. 31, 2019
Risks and Uncertainties [Abstract]
Percentage of benchmark loan to appraisal ratio in excess of which mortgage insurance is required	80.00%

Fair value measurements - Fair

Fair value measurements - Fair Value Hierarchy of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financial assets
Available-for-sale investment securities	$ 1,232,826	$ 1,388,533
Held-to-maturity investment securities	143,467	142,057
Financial liabilities
Short-term borrowings—other than bank	185,710	73,992
Other bank borrowings	115,110	110,040
Carrying or notional amount
Financial assets
Available-for-sale investment securities	1,232,826	1,388,533
Held-to-maturity investment securities	139,451	141,875
Stock in Federal Home Loan Bank	8,434	9,958
Loans, net	5,080,107	4,792,707
Mortgage servicing rights	9,101	8,062
Derivative assets	25,179	10,180
Financial liabilities
Deposit liabilities	769,825	827,841
Short-term borrowings—other than bank	185,710	73,992
Other bank borrowings	115,110	110,040
Long-term debt, net—other than bank	1,964,365	1,879,641
Derivative liabilities	51,375	34,132
Carrying or notional amount | Hawaiian Electric Company, Inc. and Subsidiaries
Financial liabilities
Long-term debt, net—other than bank	1,497,667	1,418,802
Short-term borrowings	88,987	25,000
Estimated fair value
Financial assets
Available-for-sale investment securities	1,232,826	1,388,533
Held-to-maturity investment securities	143,467	142,057
Stock in Federal Home Loan Bank	8,434	9,958
Loans, net	5,157,537	4,802,053
Mortgage servicing rights	12,379	13,618
Derivative assets	300	91
Financial liabilities
Deposit liabilities	765,976	817,667
Short-term borrowings—other than bank	185,710	73,992
Other bank borrowings	115,107	110,037
Long-term debt, net—other than bank	2,156,927	1,904,261
Derivative liabilities	2,218	630
Estimated fair value | Hawaiian Electric Company, Inc. and Subsidiaries
Financial liabilities
Long-term debt, net—other than bank	1,670,189	1,443,968
Short-term borrowings	88,987	25,000
Estimated fair value | Level 1
Financial assets
Available-for-sale investment securities	0	0
Held-to-maturity investment securities	0	0
Stock in Federal Home Loan Bank	0	0
Loans, net	0	0
Mortgage servicing rights	0	0
Derivative assets	0	0
Financial liabilities
Deposit liabilities	0	0
Short-term borrowings—other than bank	0	0
Other bank borrowings	0	0
Long-term debt, net—other than bank		0
Derivative liabilities	33	34
Estimated fair value | Level 1 | Hawaiian Electric Company, Inc. and Subsidiaries
Financial liabilities
Long-term debt, net—other than bank	0	0
Short-term borrowings	0	0
Estimated fair value | Level 2
Financial assets
Available-for-sale investment securities	1,204,229	1,364,897
Held-to-maturity investment securities	143,467	142,057
Stock in Federal Home Loan Bank	8,434	9,958
Loans, net	12,295	1,809
Mortgage servicing rights	0	0
Derivative assets	300	91
Financial liabilities
Deposit liabilities	765,976	817,667
Short-term borrowings—other than bank	185,710	73,992
Other bank borrowings	115,107	110,037
Long-term debt, net—other than bank	2,156,927	1,904,261
Derivative liabilities	2,185	596
Estimated fair value | Level 2 | Hawaiian Electric Company, Inc. and Subsidiaries
Financial liabilities
Long-term debt, net—other than bank	1,670,189	1,443,968
Short-term borrowings	88,987	25,000
Estimated fair value | Level 3
Financial assets
Available-for-sale investment securities	28,597	23,636
Held-to-maturity investment securities	0	0
Stock in Federal Home Loan Bank	0	0
Loans, net	5,145,242	4,800,244
Mortgage servicing rights	12,379	13,618
Derivative assets	0	0
Financial liabilities
Deposit liabilities	0	0
Short-term borrowings—other than bank	0	0
Other bank borrowings	0	0
Long-term debt, net—other than bank		0
Derivative liabilities	0	0
Estimated fair value | Level 3 | Hawaiian Electric Company, Inc. and Subsidiaries
Financial liabilities
Long-term debt, net—other than bank	0	0
Short-term borrowings	$ 0	$ 0

Fair value measurements - Fai_2

Fair value measurements - Fair Value Measurements on a Recurring Basis (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	$ 1,232,826	$ 1,388,533
Discount rate
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Mortgage revenue bonds, measurement input	0.0341
Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	$ 1,026,385	1,161,416
U.S. Treasury and federal agency obligations
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	117,787	154,349
Mortgage revenue bonds
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	28,597	23,636
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, January 1	23,636	15,427
Principal payments received	0	0
Purchases	4,961	8,209
Unrealized gain (loss) included in other comprehensive income	0	0
Balance, December 31	28,597	23,636
Fair value measurements on a recurring basis | Level 1
Fair value measurements on a recurring and nonrecurring basis
Derivative assets	0	0
Derivative liabilities	33	34
Fair value measurements on a recurring basis | Level 1 | Bank
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	0	0
Fair value measurements on a recurring basis | Level 1 | Bank | Interest Rate Lock Commitments
Fair value measurements on a recurring and nonrecurring basis
Derivative assets	0	0
Derivative liabilities	0	0
Fair value measurements on a recurring basis | Level 1 | Bank | Forward commitments
Fair value measurements on a recurring and nonrecurring basis
Derivative assets	0	0
Derivative liabilities	33	34
Fair value measurements on a recurring basis | Level 1 | Bank | Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	0	0
Fair value measurements on a recurring basis | Level 1 | Bank | U.S. Treasury and federal agency obligations
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	0	0
Fair value measurements on a recurring basis | Level 1 | Bank | Corporate bonds
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	0	0
Fair value measurements on a recurring basis | Level 1 | Bank | Mortgage revenue bonds
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	0	0
Fair value measurements on a recurring basis | Level 1 | Other | Interest rate swap
Fair value measurements on a recurring and nonrecurring basis
Derivative liabilities	0	0
Fair value measurements on a recurring basis | Level 2
Fair value measurements on a recurring and nonrecurring basis
Derivative assets	300	91
Derivative liabilities	2,185	596
Fair value measurements on a recurring basis | Level 2 | Bank
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	1,204,229	1,364,897
Fair value measurements on a recurring basis | Level 2 | Bank | Interest Rate Lock Commitments
Fair value measurements on a recurring and nonrecurring basis
Derivative assets	297	91
Derivative liabilities	0	0
Fair value measurements on a recurring basis | Level 2 | Bank | Forward commitments
Fair value measurements on a recurring and nonrecurring basis
Derivative assets	3	0
Derivative liabilities	12	9
Fair value measurements on a recurring basis | Level 2 | Bank | Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	1,026,385	1,161,416
Fair value measurements on a recurring basis | Level 2 | Bank | U.S. Treasury and federal agency obligations
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	117,787	154,349
Fair value measurements on a recurring basis | Level 2 | Bank | Corporate bonds
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	60,057	49,132
Fair value measurements on a recurring basis | Level 2 | Bank | Mortgage revenue bonds
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	0	0
Fair value measurements on a recurring basis | Level 2 | Other | Interest rate swap
Fair value measurements on a recurring and nonrecurring basis
Derivative liabilities	2,173	587
Fair value measurements on a recurring basis | Level 3
Fair value measurements on a recurring and nonrecurring basis
Derivative assets	0	0
Derivative liabilities	0	0
Fair value measurements on a recurring basis | Level 3 | Bank
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	28,597	23,636
Fair value measurements on a recurring basis | Level 3 | Bank | Interest Rate Lock Commitments
Fair value measurements on a recurring and nonrecurring basis
Derivative assets	0	0
Derivative liabilities	0	0
Fair value measurements on a recurring basis | Level 3 | Bank | Forward commitments
Fair value measurements on a recurring and nonrecurring basis
Derivative assets	0	0
Derivative liabilities	0	0
Fair value measurements on a recurring basis | Level 3 | Bank | Mortgage-backed securities — issued or guaranteed by U.S. Government agencies or sponsored agencies
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	0	0
Fair value measurements on a recurring basis | Level 3 | Bank | U.S. Treasury and federal agency obligations
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	0	0
Fair value measurements on a recurring basis | Level 3 | Bank | Corporate bonds
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	0	0
Fair value measurements on a recurring basis | Level 3 | Bank | Mortgage revenue bonds
Fair value measurements on a recurring and nonrecurring basis
Available-for-sale, at fair value	28,597	23,636
Fair value measurements on a recurring basis | Level 3 | Other | Interest rate swap
Fair value measurements on a recurring and nonrecurring basis
Derivative liabilities	$ 0	$ 0

Fair value measurements - Fai_3

Fair value measurements - Fair Value Measurements on a Nonrecurring Basis (Details) - Fair value measurements on a nonrecurring basis - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Fair value measurements on a recurring and nonrecurring basis
Loans	$ 25	$ 77
Real estate acquired in settlement of loans		186
Level 1
Fair value measurements on a recurring and nonrecurring basis
Loans	0	0
Real estate acquired in settlement of loans		0
Level 2
Fair value measurements on a recurring and nonrecurring basis
Loans	0	0
Real estate acquired in settlement of loans		0
Level 3
Fair value measurements on a recurring and nonrecurring basis
Loans	$ 25	77
Real estate acquired in settlement of loans		$ 186

Fair value measurements - Quant

Fair value measurements - Quantitative Information About Level 3 Fair Value Measurements (Details) - Level 3 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Loans
Fair value measurements
Fair value	$ 25	$ 77
Home equity line of credit | Fair value of property or collateral
Fair value measurements
Fair value	$ 77
Selling cost	7.00%
Residential loan | Fair value of property or collateral
Fair value measurements
Fair value	$ 25
Selling cost		7.00%
Real estate acquired in settlement of loans
Fair value measurements
Fair value		$ 186
Real estate acquired in settlement of loans | Fair value of property or collateral
Fair value measurements
Selling cost	7.00%

Quarterly information (unaudi_3

Quarterly information (unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Revenues	$ 725,966	$ 771,535	$ 715,485	$ 661,615	$ 761,650	$ 768,048	$ 685,277	$ 645,874	$ 2,874,601	$ 2,860,849	$ 2,555,625
Operating income	100,795	97,308	72,634	77,937	84,604	98,064	78,799	71,889	348,674	333,356	346,233
Net income	66,736	63,890	42,985	46,161	50,046	66,371	46,527	40,720	219,772	203,664	167,187
Net income for common stock	$ 66,263	$ 63,419	$ 42,512	$ 45,688	$ 49,573	$ 65,900	$ 46,054	$ 40,247	$ 217,882	$ 201,774	$ 165,297
Basic earnings per common share (in dollars per share)	$ 0.61	$ 0.58	$ 0.39	$ 0.42	$ 0.46	$ 0.61	$ 0.42	$ 0.37	$ 2	$ 1.85	$ 1.52
Diluted earnings per common share (in dollars per share)	0.61	0.58	0.39	0.42	0.45	0.60	0.42	0.37	1.99	1.85	1.52
Dividends declared per common share (in dollars per share)	$ 0.32	$ 0.32	$ 0.32	$ 0.32	$ 0.31	$ 0.31	$ 0.31	$ 0.31	$ 1.28	$ 1.24	$ 1.24
Hawaiian Electric Company, Inc. and Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenues	$ 645,333	$ 688,330	$ 633,784	$ 578,495	$ 680,563	$ 687,409	$ 608,126	$ 570,427	$ 2,545,942	$ 2,546,525	$ 2,257,566
Operating income	70,331	71,793	55,694	56,560	61,112	74,036	55,144	51,369	254,378	241,661	263,524
Net income	45,860	47,277	33,073	32,625	35,796	50,210	31,668	27,974	158,835	145,648	121,946
Net income for common stock	45,361	$ 46,779	$ 32,574	$ 32,126	$ 35,297	$ 49,712	$ 31,169	$ 27,475	$ 156,840	$ 143,653	$ 119,951
ASB Hawaii, Inc.
Condensed Financial Statements, Captions [Line Items]
Gain on sale of properties	10,800
Gain on the sale of properties included in net income	$ 7,900
Gain on the sale of properties, earnings per share basic and diluted (in dollars per share)	$ 0.07
Statutory income tax rate	26.80%

SCHEDULE I - CONDENSED FINANC_2

SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT - BALANCE SHEETS (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Assets
Cash and cash equivalents	$ 196,813	$ 169,208
Accounts receivable	300,794	325,672
Property, plant and equipment, net	5,109,628	4,830,118
Other assets and intercompany receivables	649,885	530,364
Total assets	13,745,251	13,104,051	$ 12,534,160
Liabilities
Accounts payable	220,633	214,773
Long-term debt, net	1,964,365	1,879,641
Other	583,545	580,788
Total liabilities	11,430,698	10,907,478
Shareholders' equity
Preferred stock, no par value, authorized 10,000,000 shares; issued: none	0	0
Common stock equity	1,678,257	1,669,267
Retained earnings	622,042	543,623
Accumulated other comprehensive loss	(20,039)	(50,610)
Total shareholders’ equity	2,280,260	2,162,280	$ 2,097,386	$ 2,066,753
Total capitalization and liabilities	$ 13,745,251	$ 13,104,051
Preferred stock, authorized shares	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Common stock, authorized shares	200,000,000	200,000,000
Common stock, issued shares	108,973,328	108,879,245
Common stock, outstanding shares	108,973,328	108,879,245
Parent Company
Assets
Cash and cash equivalents	$ 953	$ 3,742
Accounts receivable	779	2,604
Notes receivable from subsidiaries	22,598	20,789
Property, plant and equipment, net	2,931	3,456
Deferred income tax assets	10,754	10,147
Other assets and intercompany receivables	21,770	11,963
Investments in subsidiaries, at equity	2,761,802	2,605,038
Total assets	2,821,587	2,657,739
Liabilities
Accounts payable	1,509	2,001
Interest payable	3,041	3,476
Notes payable to subsidiaries	0	34
Commercial paper	96,723	48,992
Long-term debt, net	399,064	398,874
Retirement benefits liability	29,367	29,565
Other	11,623	12,517
Total liabilities	541,327	495,459
Shareholders' equity
Preferred stock, no par value, authorized 10,000,000 shares; issued: none	0	0
Common stock equity	1,678,257	1,669,267
Retained earnings	622,042	543,623
Accumulated other comprehensive loss	(20,039)	(50,610)
Total shareholders’ equity	2,280,260	2,162,280
Total capitalization and liabilities	$ 2,821,587	$ 2,657,739
Preferred stock, authorized shares	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Common stock, authorized shares	200,000,000	200,000,000
Common stock, issued shares	108,973,328	108,879,245
Common stock, outstanding shares	108,973,328	108,879,245

SCHEDULE I - CONDENSED FINANC_3

SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT - STATEMENTS OF INCOME AND CHANGES IN SHAREHOLDERS' EQUITY (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues
Revenues									$ 2,622,025	$ 2,614,831
Expenses:
Depreciation of property, plant and equipment									229,858	214,036	$ 200,658
Total expenses									2,525,927	2,527,493	2,209,392
Retirement defined benefits expense—other than service costs									2,806	5,962	7,942
Interest expense									109,339	104,216	91,128
Income before income taxes									271,409	254,461	276,580
Income benefits									(51,637)	(50,797)	(109,393)
Net income (loss)	$ 66,736	$ 63,890	$ 42,985	$ 46,161	$ 50,046	$ 66,371	$ 46,527	$ 40,720	219,772	203,664	167,187
Parent Company
Revenues
Revenues									777	429	798
Equity in net income of subsidiaries									246,005	226,972	187,097
Expenses:
Operating, administrative and general									19,195	19,515	16,578
Depreciation of property, plant and equipment									570	597	548
Taxes, other than income taxes									570	509	496
Total expenses									20,335	20,621	17,622
Income before interest expense and income (taxes) benefits									226,447	206,780	170,273
Retirement defined benefits expense—other than service costs									442	674	1,119
Interest expense									17,930	12,664	9,389
Income before income taxes									208,075	193,442	159,765
Income benefits									9,807	8,332	5,532
Net income (loss)									$ 217,882	$ 201,774	$ 165,297

SCHEDULE I - CONDENSED FINANC_4

SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT - STATEMENTS OF CASH FLOWS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net cash provided by operating activities	$ 512,470	$ 499,312	$ 420,441
Cash flows from investing activities
Capital expenditures	(457,520)	(537,369)	(495,187)
Other, net	13,292	14,534	7,487
Net cash used in investing activities	(541,709)	(792,059)	(815,299)
Cash flows from financing activities
Net increase (decrease) in short-term borrowings with original maturities of three months or less	86,718	(18,999)	67,992
Proceeds from issuance of short-term debt	75,000	25,000	125,000
Repayment of short-term debt	(50,000)	(50,000)	(75,000)
Proceeds from issuance of long-term debt	289,349	250,000	532,325
Repayment of long-term debt and funds transferred for repayment of long-term debt	(287,285)	(53,887)	(465,000)
Common stock dividends	(139,463)	(134,987)	(134,873)
Other	(1,836)	(1,603)	(6,349)
Net cash used in financing activities	87,716	200,074	378,287
Net decrease in cash and equivalents	58,477	(92,673)	(16,571)
Cash, cash equivalents and restricted cash, January 1	169,208	261,881	278,452
Cash, cash equivalents and restricted cash, December 31	227,685	169,208	261,881
Parent Company
Cash flows from operating activities
Net cash provided by operating activities	131,120	135,470	99,600
Cash flows from investing activities
Increase in note receivable from subsidiary	(1,187)	(20,596)	(70,000)
Decrease in note receivable from subsidiary	0	0	66,391
Capital expenditures	(47)	(143)	(317)
Investments in subsidiaries	(38,935)	(71,970)	(22,353)
Other, net	(1,001)	140	(177)
Net cash used in investing activities	(41,170)	(92,569)	(26,456)
Cash flows from financing activities
Net increase (decrease) in notes payable to subsidiaries with original maturities of three months or less	0	(30)	98
Net increase (decrease) in short-term borrowings with original maturities of three months or less	47,731	(14,000)	62,993
Proceeds from issuance of short-term debt	0	0	125,000
Repayment of short-term debt	0	(50,000)	(75,000)
Proceeds from issuance of long-term debt	0	150,000	150,000
Repayment of long-term debt and funds transferred for repayment of long-term debt	0	0	(200,000)
Withheld shares for employee taxes on vested share-based compensation	(997)	(996)	(3,828)
Common stock dividends	(139,463)	(134,987)	(134,873)
Other	(10)	(848)	(756)
Net cash used in financing activities	(92,739)	(50,861)	(76,366)
Net decrease in cash and equivalents	(2,789)	(7,960)	(3,222)
Cash, cash equivalents and restricted cash, January 1	3,742	11,702	14,924
Cash, cash equivalents and restricted cash, December 31	$ 953	$ 3,742	$ 11,702

SCHEDULE I - CONDENSED FINANC_5

SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Less unamortized debt issuance costs	$ (2,350,000)	$ (2,599,000)
Long-term debt, net—other than bank	1,964,365,000	1,879,641,000
Aggregate principal payments, fiscal year maturity:
2020	102,000,000
2021	54,000,000
2022	213,000,000
2023	154,000,000
2024	5,000,000
Parent Company
Condensed Financial Statements, Captions [Line Items]
Less unamortized debt issuance costs	(936,000)	(1,126,000)
Long-term debt, net—other than bank	399,064,000	398,874,000
Aggregate principal payments, fiscal year maturity:
2020	0
2021	50,000,000
2022	150,000,000
2023	50,000,000
2024	0
Thereafter	150,000,000
Cash dividends paid	157,000,000	154,000,000	$ 125,000,000
Parent Company | ASB Hawaii, Inc. | Consolidated subsidiary
Aggregate principal payments, fiscal year maturity:
Accounts receivable reduction	2,300,000	2,300,000	2,800,000
HEI notes payable increase to ASHI	2,300,000	2,300,000	2,800,000
Parent Company | Hamakua Energy Partners, L.P. (HEP)
Aggregate principal payments, fiscal year maturity:
Notes receivable converted into equity			$ 3,600,000
Parent Company | Self Insured United States Longshore and Horbor Bond
Aggregate principal payments, fiscal year maturity:
Maximum undiscounted exposure	600,000
Parent Company | Self Insured Automobile Bond
Aggregate principal payments, fiscal year maturity:
Maximum undiscounted exposure	700,000
Parent Company | HEI loan 2.99%, due 2022
Condensed Financial Statements, Captions [Line Items]
Gross long-term debt	$ 150,000,000	150,000,000
Debt instrument, stated interest rate	2.99%
Parent Company | HEI 5.67% senior notes, due 2021
Condensed Financial Statements, Captions [Line Items]
Gross long-term debt	$ 50,000,000	50,000,000
Debt instrument, stated interest rate	5.67%
Parent Company | HEI 3.99% senior notes, due 2023
Condensed Financial Statements, Captions [Line Items]
Gross long-term debt	$ 50,000,000	50,000,000
Debt instrument, stated interest rate	3.99%
Parent Company | HEI 4.58% senior notes, due 2025
Condensed Financial Statements, Captions [Line Items]
Gross long-term debt	$ 50,000,000	50,000,000
Debt instrument, stated interest rate	4.58%
Parent Company | HEI 4.72% senior notes, due 2028
Condensed Financial Statements, Captions [Line Items]
Gross long-term debt	$ 100,000,000	$ 100,000,000
Debt instrument, stated interest rate	4.72%

SCHEDULE II - VALUATION AND Q_2

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Valuation and qualifying accounts
Reclassifications of allowance from one customer account into long term assets		$ (4,934)	$ 841
Allowance for uncollectible accounts – electric utility | Hawaiian Electric Company, Inc. and Subsidiaries
Valuation and qualifying accounts
Balance at beginning of period	$ 1,480	1,178	1,121
Charged to costs and expenses	2,106	2,474	1,810
Charged to other accounts	795	(4,099)	785
Deductions	3,004	(1,927)	2,538
Balance at end of period	1,377	1,480	1,178
Allowance for uncollectible interest – bank | Bank
Valuation and qualifying accounts
Balance at beginning of period	373	367	1,834
Charged to costs and expenses	0	0	0
Charged to other accounts	(99)	6	0
Deductions	0	0	1,467
Balance at end of period	274	373	367
Allowance for losses for loans – bank | Bank
Valuation and qualifying accounts
Balance at beginning of period	52,119	53,637	55,533
Charged to costs and expenses	23,480	14,745	10,901
Charged to other accounts	6,418	4,254	4,016
Deductions	28,662	20,517	16,813
Balance at end of period	$ 53,355	52,119	53,637
Deferred tax valuation allowance – HEI
Valuation and qualifying accounts
Balance at beginning of period		$ 0	38
Charged to costs and expenses			0
Charged to other accounts			0
Deductions			38
Balance at end of period			$ 0