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Credit agreements and changes in debt - Narrative (Details) | Apr. 20, 2020 USD ($) Institution | Mar. 31, 2020 USD ($) Institution | Dec. 31, 2019 USD ($)
--- | --- | --- | ---
Credit agreement |  |  |
Number of financial institutions | Institution |  | 8 |
Debt outstanding |  | $ 2,068,092,000 | $ 1,964,365,000
Hawaiian Electric (parent only) | 364-Day Revolver | Subsequent Event | Revolving Credit Facility |  |  |
Credit agreement |  |  |
Number of financial institutions | Institution | 4 |  |
Credit agreement | $ 75,000,000 |  |
Line of credit facility | HEI Facility |  |  |
Credit agreement |  |  |
Credit agreement |  | 150,000,000 |
Debt outstanding |  | 64,500,000 | 0
Line of credit facility | HEI Facility | Subsequent Event |  |  |
Credit agreement |  |  |
Increase in borrowing capacity | $ 65,000,000 |  |
Line of credit facility | Hawaiian Electric (parent only) | Hawaiian Electric Facility |  |  |
Credit agreement |  |  |
Credit agreement |  | 200,000,000 |
Debt outstanding |  | $ 95,000,000 | $ 0
Term Loan | Subsequent Event |  |  |
Credit agreement |  |  |
Number of financial institutions | Institution | 2 |  |
Credit agreement | $ 65,000,000 |  |

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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 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 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=6877327&loc=d3e13212-122682 + Details
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: 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)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 3: 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=6876686&loc=d3e534808-122878 Reference 4: 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=6877327&loc=d3e13212-122682 + Details
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- Details
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