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Electric utility segment - Army Privatization (Details) - Hawaiian Electric Company, Inc. and Subsidiaries $ in Millions | Mar. 01, 2022 USD ($) | Oct. 30, 2020 USD ($) installation
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Regulatory Projects and Legal Obligations [Line Items] |  |
Public utilities, electric distribution system, contract period | 50 years | 50 years
Number of U.S. army installations being serviced | installation |  | 12
Purchase price | $ 14.5 |
price of acquisition, expected |  | $ 4.0
Transition period | 1 year |
Capital upgrade over the period | 6 years |

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- Details
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