XML 59 R46.htm IDEA: XBRL DOCUMENT
v3.20.2

Electric utility segment - Condensed consolidating statement of cash flows (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Cash flows from operating activities |  |  |
Net cash provided by operating activities | $ 312,268 | $ 341,428 |
Cash flows from investing activities |  |  |
Capital expenditures | (296,172) | (332,273) |
Other | 4,899 | 3,495 |
Net cash used in investing activities | (1,144,633) | (373,434) |
Cash flows from financing activities |  |  |
Common stock dividends | (108,066) | (104,591) |
Proceeds from issuance of short-term debt | (112,710) | 64,844 |
Proceeds from issuance of long-term debt | 365,146 | 208,970 |
Repayment of short-term debt | (100,000) | 0 |
Repayment of long-term debt and funds transferred for repayment of long-term debt | (178,291) | (204,278) |
Net increase in other bank borrowings with original maturities of three months or less | 6,765 | 19,150 |
Other | (7,275) | (4,266) |
Net cash provided by financing activities | 819,687 | 39,786 |
Net increase (decrease) in cash, cash equivalents and restricted cash | (12,678) | 7,780 |
Cash, cash equivalents and restricted cash, beginning of period | 227,685 | 169,208 |
Cash, cash equivalents and restricted cash, end of period | 215,007 | 176,988 |
Less: Restricted cash | (21,881) | 0 | $ (30,872)
Cash and cash equivalents, end of period | 193,126 | 176,988 | 196,813
Consolidating adjustments |  |  |
Cash flows from operating activities |  |  |
Net cash provided by operating activities | (22,624) | (18,935) |
Cash flows from investing activities |  |  |
Capital expenditures | 0 | 0 |
Advances from (to) affiliates | (7,200) | 37,200 |
Other | (404) | 0 |
Net cash used in investing activities | (7,604) | 37,200 |
Cash flows from financing activities |  |  |
Common stock dividends | 23,028 | 18,936 |
Preferred stock dividends of Hawaiian Electric and subsidiaries | 0 | 0 |
Proceeds from issuance of short-term debt | 0 | 0 |
Proceeds from issuance of long-term debt | 0 | 0 |
Repayment of short-term debt | 0 |  |
Repayment of long-term debt and funds transferred for repayment of long-term debt | 0 | 0 |
Net increase in other bank borrowings with original maturities of three months or less | 7,200 | (37,200) |
Other | 0 | (1) |
Net cash provided by financing activities | 30,228 | (18,265) |
Net increase (decrease) in cash, cash equivalents and restricted cash | 0 | 0 |
Cash, cash equivalents and restricted cash, beginning of period | 0 | 0 |
Cash, cash equivalents and restricted cash, end of period | 0 | 0 |
Less: Restricted cash | 0 |  | 0
Cash and cash equivalents, end of period | 0 |  | 0
Hawaiian Electric (parent only) | Reportable Legal Entities |  |  |
Cash flows from operating activities |  |  |
Net cash provided by operating activities | 205,645 | 223,733 |
Cash flows from investing activities |  |  |
Capital expenditures | (180,088) | (223,803) |
Advances from (to) affiliates | (800) | (22,200) |
Other | 5,636 | 2,975 |
Net cash used in investing activities | (175,252) | (243,028) |
Cash flows from financing activities |  |  |
Common stock dividends | (80,352) | (75,939) |
Preferred stock dividends of Hawaiian Electric and subsidiaries | (810) | (810) |
Proceeds from issuance of short-term debt | 100,000 | 25,000 |
Proceeds from issuance of long-term debt | 205,000 | 120,000 |
Repayment of short-term debt | (100,000) |  |
Repayment of long-term debt and funds transferred for repayment of long-term debt | (95,000) | (121,546) |
Net increase in other bank borrowings with original maturities of three months or less | (46,987) | 77,353 |
Other | (1,249) | 578 |
Net cash provided by financing activities | (19,398) | 24,636 |
Net increase (decrease) in cash, cash equivalents and restricted cash | 10,995 | 5,341 |
Cash, cash equivalents and restricted cash, beginning of period | 32,988 | 16,732 |
Cash, cash equivalents and restricted cash, end of period | 43,983 | 22,073 |
Less: Restricted cash | (20,458) |  | (30,749)
Cash and cash equivalents, end of period | 23,525 |  | 2,239
HELCO |  |  |
Cash flows from financing activities |  |  |
Repayment of long-term debt and funds transferred for repayment of long-term debt | (14,000) |  |
HELCO | Reportable Legal Entities |  |  |
Cash flows from operating activities |  |  |
Net cash provided by operating activities | 27,256 | 41,694 |
Cash flows from investing activities |  |  |
Capital expenditures | (48,750) | (29,119) |
Advances from (to) affiliates | 8,000 | (15,000) |
Other | 1,056 | (283) |
Net cash used in investing activities | (39,694) | (44,402) |
Cash flows from financing activities |  |  |
Common stock dividends | (12,240) | (7,635) |
Preferred stock dividends of Hawaiian Electric and subsidiaries | (400) | (400) |
Proceeds from issuance of short-term debt | 0 | 0 |
Proceeds from issuance of long-term debt | 10,000 | 70,000 |
Repayment of short-term debt | 0 |  |
Repayment of long-term debt and funds transferred for repayment of long-term debt |  | (70,000) |
Net increase in other bank borrowings with original maturities of three months or less | 26,500 | 0 |
Other | (67) | 123 |
Net cash provided by financing activities | 9,793 | (7,912) |
Net increase (decrease) in cash, cash equivalents and restricted cash | (2,645) | (10,620) |
Cash, cash equivalents and restricted cash, beginning of period | 7,008 | 15,623 |
Cash, cash equivalents and restricted cash, end of period | 4,363 | 5,003 |
Less: Restricted cash | 0 |  | (123)
Cash and cash equivalents, end of period | 4,363 |  | 6,885
Maui Electric |  |  |
Cash flows from financing activities |  |  |
Repayment of long-term debt and funds transferred for repayment of long-term debt | 0 |  |
Maui Electric | Reportable Legal Entities |  |  |
Cash flows from operating activities |  |  |
Net cash provided by operating activities | 34,678 | 36,126 |
Cash flows from investing activities |  |  |
Capital expenditures | (38,644) | (44,885) |
Advances from (to) affiliates | 0 | 0 |
Other | 1,031 | (30) |
Net cash used in investing activities | (37,613) | (44,915) |
Cash flows from financing activities |  |  |
Common stock dividends | (10,788) | (11,301) |
Preferred stock dividends of Hawaiian Electric and subsidiaries | (286) | (286) |
Proceeds from issuance of short-term debt | 0 | 0 |
Proceeds from issuance of long-term debt | 40,000 | 10,000 |
Repayment of short-term debt | 0 |  |
Repayment of long-term debt and funds transferred for repayment of long-term debt |  | (10,000) |
Net increase in other bank borrowings with original maturities of three months or less | (25,700) | 22,200 |
Other | (253) | 85 |
Net cash provided by financing activities | 2,973 | 10,698 |
Net increase (decrease) in cash, cash equivalents and restricted cash | 38 | 1,909 |
Cash, cash equivalents and restricted cash, beginning of period | 1,797 | 3,421 |
Cash, cash equivalents and restricted cash, end of period | 1,835 | 5,330 |
Less: Restricted cash | 0 |  | 0
Cash and cash equivalents, end of period | 1,835 |  | 1,797
Other subsidiaries |  |  |
Cash flows from financing activities |  |  |
Repayment of long-term debt and funds transferred for repayment of long-term debt | 0 |  |
Other subsidiaries | Reportable Legal Entities |  |  |
Cash flows from operating activities |  |  |
Net cash provided by operating activities | 0 | 0 |
Cash flows from investing activities |  |  |
Capital expenditures | 0 | 0 |
Advances from (to) affiliates | 0 | 0 |
Other | (24) | 0 |
Net cash used in investing activities | (24) | 0 |
Cash flows from financing activities |  |  |
Common stock dividends | 0 | 0 |
Preferred stock dividends of Hawaiian Electric and subsidiaries | 0 | 0 |
Proceeds from issuance of short-term debt | 0 | 0 |
Proceeds from issuance of long-term debt | 0 | 0 |
Repayment of short-term debt | 0 |  |
Repayment of long-term debt and funds transferred for repayment of long-term debt |  | 0 |
Net increase in other bank borrowings with original maturities of three months or less | 0 | 0 |
Other | 0 | 0 |
Net cash provided by financing activities | 0 | 0 |
Net increase (decrease) in cash, cash equivalents and restricted cash | (24) | 0 |
Cash, cash equivalents and restricted cash, beginning of period | 101 | 101 |
Cash, cash equivalents and restricted cash, end of period | 77 | 101 |
Less: Restricted cash | 0 |  | 0
Cash and cash equivalents, end of period | 77 |  | 101
Hawaiian Electric Company, Inc. and Subsidiaries |  |  |
Cash flows from operating activities |  |  |
Net cash provided by operating activities | 244,955 | 282,618 |
Cash flows from investing activities |  |  |
Capital expenditures | (267,482) | (297,807) |
Advances from (to) affiliates | 0 | 0 |
Other | 7,295 | 2,662 |
Net cash used in investing activities | (260,187) | (295,145) |
Cash flows from financing activities |  |  |
Common stock dividends | (80,352) | (75,939) |
Preferred stock dividends of Hawaiian Electric and subsidiaries | (1,496) | (1,496) |
Proceeds from issuance of short-term debt | 100,000 | 25,000 |
Proceeds from issuance of long-term debt | 255,000 | 200,000 |
Repayment of short-term debt | (100,000) | 0 |
Repayment of long-term debt and funds transferred for repayment of long-term debt | (109,000) | (201,546) |
Net increase in other bank borrowings with original maturities of three months or less | (38,987) | 62,353 |
Other | (1,569) | 785 |
Net cash provided by financing activities | 23,596 | 9,157 |
Net increase (decrease) in cash, cash equivalents and restricted cash | 8,364 | (3,370) |
Cash, cash equivalents and restricted cash, beginning of period | 41,894 | 35,877 |
Cash, cash equivalents and restricted cash, end of period | 50,258 | 32,507 |
Less: Restricted cash | (20,458) | 0 | (30,872)
Cash and cash equivalents, end of period | $ 29,800 | $ 32,507 | $ 11,022

X
- Definition The amount of cash inflows/outflows resulting from other bank borrowings. + References No definition available. + Details
Name: | he_ProceedsFromPaymentsForOtherBankBorrowings
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3044-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121566466&loc=d3e6676-107765 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CashAndCashEquivalentsAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3521-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3044-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121583591&loc=SL98516268-108586 + Details
Name: | us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=98513438&loc=d3e33268-110906 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3521-108585 + Details
Name: | us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3521-108585 + Details
Name: | us-gaap_NetCashProvidedByUsedInFinancingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3521-108585 + Details
Name: | us-gaap_NetCashProvidedByUsedInInvestingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3521-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
Name: | us-gaap_NetCashProvidedByUsedInOperatingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The net cash outflow or inflow associated with the acquisition or sale of a business segment during the period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 + Details
Name: | us-gaap_PaymentsForProceedsFromBusinessesAndInterestInAffiliates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of cash (inflow) outflow from investing activities classified as other. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
Name: | us-gaap_PaymentsForProceedsFromOtherInvestingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsOfDividendsCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of cash outflow in the form of ordinary dividends to preferred shareholders of the parent entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfLongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash inflow (outflow) from financing activities classified as other. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
Name: | us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow from a borrowing net of the cash outflow from repayment of a borrowing having initial term of repayment within three months. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3098-108585 + Details
Name: | us-gaap_ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
Name: | us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow for a borrowing having initial term of repayment within one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
Name: | us-gaap_RepaymentsOfShortTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(2)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121583591&loc=SL98516268-108586 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(1)(a)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3044-108585 + Details
Name: | us-gaap_RestrictedCashAndCashEquivalents
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | srt_ConsolidationItemsAxis=he_EliminationsAndReconcilingItemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=he_HawaiianElectricParentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=srt_ReportableLegalEntitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=he_HawaiiElectricLightCompanyIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=he_MauiElectricCompanyLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=he_RenewableHawaiiAndUluwehiokamaBiofuelsCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=he_HawaiianElectricCompanyAndSubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |