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Fair value measurements | 3 Months Ended
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Mar. 31, 2025
Fair Value Disclosures [Abstract] |
Fair value measurements | 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: Money market mutual funds. The Company considers all liquid investments purchased with an initial maturity of three months or less and deposits in money market mutual funds that are readily convertible into cash to be cash equivalents. The carrying value of cash and cash equivalents approximates fair value due to the short-term nature of these instruments. Short-term borrowings. The carrying amount of short-term borrowings approximated fair value because of the short maturity of these instruments. Long-term debt. Fair value of fixed-rate long-term debt 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. The carrying amount of floating rate long-term debt approximated fair value because of the short-term interest reset periods. Long-term debt is classified in Level 2 of the valuation hierarchy. Interest rate swaps. The Company measures its interest rate swaps at fair value. The fair values of the Company's interest rate swaps are based on the estimated amounts that the Company would receive or pay to terminate the contracts at the reporting date and are determined using interest rate pricing models and interest rate related observable inputs. The fair values of the Company's interest rate swaps are classified as a 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.
|  |  |  | 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) |  |  |  | Total
March 31, 2025 |  |  |  |  |  |  |  |  |  |
Financial assets |  |  |  |  |  |  |  |  |  |
HEI consolidated |  |  |  |  |  |  |  |  |  |
Money market mutual funds |  | $ | 1,049,070 |  |  | $ | 1,049,070 |  |  | $ | — |  |  |  |  | $ | 1,049,070 |
Derivative assets |  | 28,892 |  |  | — |  |  | 1,114 |  |  |  |  | 1,114 |
Hawaiian Electric consolidated |  |  |  |  |  |  |  |  |  |
Money market mutual funds |  | 72,329 |  |  | 72,329 |  |  | — |  |  |  |  | 72,329 |
Financial liabilities |  |  |  |  |  |  |  |  |  |
HEI consolidated |  |  |  |  |  |  |  |  |  |
Short-term borrowings, net |  | 48,738 |  |  | — |  |  | 48,738 |  |  |  |  | 48,738 |
Long-term debt, net |  | 2,617,963 |  |  | — |  |  | 2,131,016 |  |  |  |  | 2,131,016 |
Hawaiian Electric consolidated |  |  |  |  |  |  |  |  |  |
Short-term borrowings, net |  | 48,738 |  |  | — |  |  | 48,738 |  |  |  |  | 48,738 |
Long-term debt, net |  | 1,809,424 |  |  | — |  |  | 1,377,233 |  |  |  |  | 1,377,233 |
December 31, 2024 |  |  |  |  |  |  |  |  |  |
Financial assets |  |  |  |  |  |  |  |  |  |
HEI consolidated |  |  |  |  |  |  |  |  |  |
Money market mutual funds |  | $ | 1,162,259 |  |  | $ | 1,162,259 |  |  | $ | — |  |  |  |  | $ | 1,162,259 |
Derivative assets |  | 29,312 |  |  | — |  |  | 1,629 |  |  |  |  | 1,629 |
Hawaiian Electric consolidated |  |  |  |  |  |  |  |  |  |
Money market mutual funds |  | 115,599 |  |  | 115,599 |  |  | — |  |  |  |  | 115,599 |
Financial liabilities |  |  |  |  |  |  |  |  |  |
HEI consolidated |  |  |  |  |  |  |  |  |  |
Short-term borrowings, net |  | 48,623 |  |  | — |  |  | 48,623 |  |  |  |  | 48,623 |
Long-term debt, net |  | 2,799,558 |  |  | — |  |  | 2,196,403 |  |  |  |  | 2,196,403 |
Hawaiian Electric consolidated |  |  |  |  |  |  |  |  |  |
Short-term borrowings, net |  | 48,623 |  |  | — |  |  | 48,623 |  |  |  |  | 48,623 |
Long-term debt, net |  | 1,901,214 |  |  | — |  |  | 1,446,316 |  |  |  |  | 1,446,316 |
Assets and liabilities measured at fair value on a recurring basis include money market mutual funds and derivative assets and liabilities as included in the table above. Money market mutual funds are included in “Cash and cash equivalents” and “Restricted cash” in the Condensed Consolidated Balance Sheets. Derivatives are included in “Other noncurrent assets” and “Other noncurrent liabilities” in the Condensed Consolidated Balance Sheets. There were no Level 3 assets as of March 31, 2025 and December 31, 2024.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 107 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-107 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 940 -SubTopic 820 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478119/940-820-50-1 + Details
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