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Segment financial information
 12 Months Ended
Dec. 31, 2022
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 electricity 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), Pacific Current and its subsidiaries, and other inactive subsidiaries not qualifying as reportable segments, and intercompany eliminations.
Pacific Current. Pacific Current was formed in 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, Mauo, Kaʻieʻie Waho, and Mahipapa include:
Hamakua power plant. In 2017, Hamakua Energy 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-plus-storage power purchase agreement. In 2018, Mauo executed definitive agreements to acquire a solar-plus-storage PPA for a multi-site, commercial-scale project that provides 8.1 MW of solar capacity and 42.6 megawatt-hours (MWh) of storage capacity on the islands of Maui and Oahu. The PPA has a 15-year term with a customer option to extend for an additional five years.
6-MW photovoltaic system. In September 2020, Kaʻieʻie Waho acquired a 6-MW photovoltaic system situated on 20 acres of land on the island of Kauai. Kauai Island Utility Cooperative purchases all of the power generated by the system under a PPA that expires in 2033.
7.5-MW renewable, firm dispatchable closed-loop biomass-to-energy facility. In July 2022, Mahipapa acquired a 7.5-MW renewable, firm dispatchable closed-loop biomass-to-energy facility on Kauai. Kauai Island Utility Cooperative purchases all of the power generated by the system under a PPA that expires in 2035.
Segment financial information was as follows:
(in thousands)Electric utilityBankOtherTotal
2022   
Revenues from external customers$3,408,583 $321,068 $12,334 $3,741,985 
Intersegment revenues (eliminations)4 — (4)— 
Revenues3,408,587 321,068 12,330 3,741,985 
Depreciation and amortization260,744 24,436 9,661 294,841 
Interest expense, net76,416 13,301 26,986 116,703 
Income (loss) before income taxes240,600 102,241 (38,646)304,195 
Income taxes (benefit)49,676 22,252 (10,761)61,167 
Net income (loss)190,924 79,989 (27,885)243,028 
Preferred stock dividends of subsidiaries1,995 — (105)1,890 
Net income (loss) for common stock188,929 79,989 (27,780)241,138 
Capital expenditures1
329,457 4,704 9,876 344,037 
Assets (at December 31, 2022)6,597,467 9,545,970 140,807 16,284,244 
2021    
Revenues from external customers$2,539,589 $306,398 $4,392 $2,850,379 
Intersegment revenues (eliminations)47 — (47)— 
Revenues2,539,636 306,398 4,345 2,850,379 
Depreciation and amortization251,206 21,124 6,372 278,702 
Interest expense, net72,447 5,040 21,916 99,403 
Income (loss) before income taxes223,785 130,559 (43,481)310,863 
Income taxes (benefit)44,148 29,325 (10,666)62,807 
Net income (loss)179,637 101,234 (32,815)248,056 
Preferred stock dividends of subsidiaries1,995 — (105)1,890 
Net income (loss) for common stock177,642 101,234 (32,710)246,166 
Capital expenditures1
292,000 11,131 11,393 314,524 
Assets (at December 31, 2021)6,491,625 9,181,603 149,409 15,822,637 
2020    
Revenues from external customers$2,265,281 $313,511 $983 $2,579,775 
Intersegment revenues (eliminations)39 — (39)— 
Revenues2,265,320 313,511 944 2,579,775 
Depreciation and amortization256,479 29,349 4,950 290,778 
Interest expense, net67,794 11,114 20,900 99,808 
Income (loss) before income taxes211,753 69,271 (40,400)240,624 
Income taxes (benefit)40,418 11,688 (11,196)40,910 
Net income (loss)171,335 57,583 (29,204)199,714 
Preferred stock dividends of subsidiaries1,995 — (105)1,890 
Net income (loss) for common stock169,340 57,583 (29,099)197,824 
Capital expenditures1
350,864 12,203 20,828 383,895 
Assets (at December 31, 2020)6,457,373 8,396,533 150,101 15,004,007 
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.
Hamakua Energy’s sales to Hawaii Electric Light (a regulated affiliate) are eliminated in consolidation.