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Revenues (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disaggregation of Revenue [Line Items] |  |  |
General payment period | 30 days |  |
Revenues from contracts with customers | $ 3,465,215 | $ 2,521,425 |
Revenues from other sources | 276,770 | 328,954 |
Total revenues | 3,741,985 | 2,850,379 | $ 2,579,775
Services/goods transferred at a point in time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 48,883 | 46,658 |
Services/goods transferred over time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 3,416,332 | 2,474,767 |
Electric energy sales - residential |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 1,078,372 | 830,653 |
Electric energy sales - commercial |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 1,087,485 | 791,424 |
Electric energy sales - large light and power |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 1,221,608 | 837,834 |
Electric energy sales - other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 17,063 | 10,770 |
Bank fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 48,883 | 46,658 |
Other sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 11,804 | 4,086 |
Regulatory revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from other sources | (29,124) | 40,069 |
Bank interest and dividend income |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from other sources | 265,874 | 242,266 |
Other bank noninterest income |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from other sources | 6,311 | 17,474 |
Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from other sources | 33,709 | 29,145 |
Hawaiian Electric Company, Inc. and Subsidiaries |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue taxes, other than income tax expense | 303,000 | 226,000 | 202,000
Revenue taxes accrued | 188,000 | 128,000 |
Electric utility |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 3,404,528 | 2,470,681 |
Revenues from other sources | 4,059 | 68,955 |
Total revenues | 3,408,587 | 2,539,636 | 2,265,320
Electric utility | Services/goods transferred at a point in time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 |
Electric utility | Services/goods transferred over time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 3,404,528 | 2,470,681 |
Electric utility | Electric energy sales - residential |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 1,078,372 | 830,653 |
Electric utility | Electric energy sales - commercial |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 1,087,485 | 791,424 |
Electric utility | Electric energy sales - large light and power |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 1,221,608 | 837,834 |
Electric utility | Electric energy sales - other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 17,063 | 10,770 |
Electric utility | Bank fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 |
Electric utility | Other sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 |
Electric utility | Regulatory revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from other sources | (29,124) | 40,069 |
Electric utility | Bank interest and dividend income |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from other sources | 0 | 0 |
Electric utility | Other bank noninterest income |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from other sources | 0 | 0 |
Electric utility | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from other sources | 33,183 | 28,886 |
Bank |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 48,883 | 46,658 |
Revenues from other sources | 272,185 | 259,740 |
Total revenues | 321,068 | 306,398 | 313,511
Bank | Services/goods transferred at a point in time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 48,883 | 46,658 |
Bank | Services/goods transferred over time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 |
Bank | Electric energy sales - residential |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 |
Bank | Electric energy sales - commercial |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 |
Bank | Electric energy sales - large light and power |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 |
Bank | Electric energy sales - other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 |
Bank | Bank fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 48,883 | 46,658 |
Bank | Other sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 |
Bank | Regulatory revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from other sources | 0 | 0 |
Bank | Bank interest and dividend income |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from other sources | 265,874 | 242,266 |
Bank | Other bank noninterest income |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from other sources | 6,311 | 17,474 |
Bank | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from other sources | 0 | 0 |
Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 11,804 | 4,086 |
Revenues from other sources | 526 | 259 |
Total revenues | 12,330 | 4,345 | $ 944
Other | Services/goods transferred at a point in time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 |
Other | Services/goods transferred over time |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 11,804 | 4,086 |
Other | Electric energy sales - residential |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 |
Other | Electric energy sales - commercial |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 |
Other | Electric energy sales - large light and power |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 |
Other | Electric energy sales - other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 |
Other | Bank fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 0 | 0 |
Other | Other sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from contracts with customers | 11,804 | 4,086 |
Other | Regulatory revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from other sources | 0 | 0 |
Other | Bank interest and dividend income |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from other sources | 0 | 0 |
Other | Other bank noninterest income |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from other sources | 0 | 0 |
Other | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues from other sources | $ 526 | $ 259 |

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