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Credit agreements and changes in long-term debt - Narrative (Details) |  |  |  | 1 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 03, 2021 USD ($) project | May 14, 2021 USD ($) institution extensionOption | Apr. 19, 2021 USD ($) | Nov. 30, 2022 USD ($) | Sep. 30, 2021 USD ($) | Sep. 29, 2021 USD ($) entity | Sep. 14, 2021 | May 13, 2021 USD ($) | Dec. 31, 2020 USD ($)
HEI Facility |  |  |  |  |  |  |  |  |
Credit agreement |  |  |  |  |  |  |  |  |
Annual fees |  | 0.20% |  |  |  |  |  |  |
HEI Facility | LIBOR |  |  |  |  |  |  |  |  |
Credit agreement |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  | 1.375% |  |  |  |  |  |  |
Hawaiian Electric Facility |  |  |  |  |  |  |  |  |
Credit agreement |  |  |  |  |  |  |  |  |
Credit agreement |  | $ 200,000,000 |  |  |  |  |  | $ 275,000,000 |
Number of extension options | extensionOption |  | 2 |  |  |  |  |  |  |
Extension period |  | 1 year |  |  |  |  |  |  |
Annual fees |  | 0.175% |  |  |  |  |  |  |
Hawaiian Electric Facility | LIBOR |  |  |  |  |  |  |  |  |
Credit agreement |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  | 1.25% |  |  |  |  |  |  |
Mauo Credit Agreement | Secured Debt |  |  |  |  |  |  |  |  |
Credit agreement |  |  |  |  |  |  |  |  |
Aggregate principal amount | $ 24,000,000 |  |  |  |  |  |  |  |
Drawn amount | $ 13,000,000 |  |  |  |  |  |  |  |
Number of solar-battery projects | project | 5 |  |  |  |  |  |  |  |
Number of solar-battery projects collateralized | project | 3 |  |  |  |  |  |  |  |
Fixed coupon interest rate | 4.90% |  |  |  |  |  |  |  |
Mauo Credit Agreement | LIBOR | Secured Debt |  |  |  |  |  |  |  |  |
Credit agreement |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 1.70% |  |  |  |  |  |  |  |
Hawaiian Electric Company, Inc. and Subsidiaries |  |  |  |  |  |  |  |  |
Credit agreement |  |  |  |  |  |  |  |  |
Short-term borrowings from non-affiliates |  |  |  |  | $ 0 |  |  |  | $ 49,979,000
Equity capitalization ratio |  |  |  |  |  |  | 58.00% |  |
Hawaiian Electric Company, Inc. and Subsidiaries | Forecast |  |  |  |  |  |  |  |  |
Credit agreement |  |  |  |  |  |  |  |  |
Refinanced debt |  |  |  | $ 150,000,000 |  |  |  |  |
Hawaiian Electric Company, Inc. and Subsidiaries | Credit Facilities |  |  |  |  |  |  |  |  |
Credit agreement |  |  |  |  |  |  |  |  |
Number of financial institutions | institution |  | 9 |  |  |  |  |  |  |
Line of credit outstanding |  |  |  |  | $ 0 |  |  |  | $ 0
Debt to capitalization ratios |  | 0.65 |  |  |  |  |  |  |
Capitalization ratio |  | 0.50 |  |  |  |  |  |  |
Consolidation capitalization ratio |  | 0.35 |  |  |  |  |  |  |
Hawaiian Electric Company, Inc. and Subsidiaries | HEI Facility |  |  |  |  |  |  |  |  |
Credit agreement |  |  |  |  |  |  |  |  |
Credit agreement |  | $ 175,000,000 |  |  |  |  |  | $ 150,000,000 |
Hawaiian Electric Company, Inc. and Subsidiaries | Unsecured Senior Notes | Senior Notes |  |  |  |  |  |  |  |  |
Credit agreement |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  | $ 125,000,000 |  |  |
Number of tranches | entity |  |  |  |  |  | 2 |  |  |
Hawaiian Electric, Parent | 364-Day Revolver | Revolving Credit Facility | Line of credit facility |  |  |  |  |  |  |  |  |
Credit agreement |  |  |  |  |  |  |  |  |
Maximum borrowing |  |  | $ 75,000,000 |  |  |  |  |  |
Debt term |  |  | 364 days |  |  |  |  |  |
Short-term borrowings from non-affiliates |  |  | $ 0 |  |  |  |  |  |

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- Definition Debt Instrument, Covenant, Consolidation Capitalization Ratio + References No definition available. + Details
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- Definition Debt Instrument, Covenant, Debt To Capitalization Ratio + References No definition available. + Details
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- Definition Debt Instrument, Maximum Borrowing Capacity + References No definition available. + Details
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- Definition Line Of Credit Facility, Extension Period + References No definition available. + Details
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- Definition Line Of Credit Facility, Number Of Extension Options + References No definition available. + Details
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- Definition Represents the number of financial institutions with which the entity entered into a revolving Non Collateralized credit agreement with a letter of credit sub-facility. + References No definition available. + Details
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- Definition Number Of Solar-Battery Projects + References No definition available. + Details
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- Definition Number Of Solar-Battery Projects Collateralized + References No definition available. + Details
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69C -URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69B -URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: 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(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: 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(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: 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(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or 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=123570139&loc=d3e3255-108585 + Details
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- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. + References Reference 1: 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=123570139&loc=d3e3291-108585 + Details
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- Definition Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 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(19)(a)) -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 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(1)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 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(13)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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