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Electric utility segment - Annual decoupling filings summary (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2023 USD ($)
Regulatory Projects and Legal Obligations [Line Items] |
Incremental Performance Incentive Mechanisms (net) | $ (0.2)
Incremental EPRM/MPIR Revenue Adjustment | 4.9
Other | 0.5
Net incremental amount to be collected under the RBA rate tariffs | 5.1
Hawaiian Electric, Parent |
Regulatory Projects and Legal Obligations [Line Items] |
Incremental Performance Incentive Mechanisms (net) | (0.4)
Incremental EPRM/MPIR Revenue Adjustment | 2.5
Other | 0.4
Net incremental amount to be collected under the RBA rate tariffs | 2.5
Hawaii Electric Light |
Regulatory Projects and Legal Obligations [Line Items] |
Incremental Performance Incentive Mechanisms (net) | 0.1
Incremental EPRM/MPIR Revenue Adjustment | 1.4
Other | 0.1
Net incremental amount to be collected under the RBA rate tariffs | 1.5
Maui Electric |
Regulatory Projects and Legal Obligations [Line Items] |
Incremental Performance Incentive Mechanisms (net) | 0.1
Incremental EPRM/MPIR Revenue Adjustment | 1.0
Other | 0.0
Net incremental amount to be collected under the RBA rate tariffs | $ 1.1

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