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Electric utility segment - Annual decoupling filings summary (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2020 USD ($)
Regulatory Projects and Legal Obligations [Line Items] |
2019 Annual incremental RAM adjusted revenues | $ 29.5
Annual change in accrued RBA balance as of December 31, 2019 (and associated revenue taxes) which incorporates MPIR recovery | (67.4)
Incremental Performance Incentive Mechanisms (net) | 2.0
Net annual incremental amount to be collected (refunded) under the tariffs | (35.9)
Hawaiian Electric (parent only) |
Regulatory Projects and Legal Obligations [Line Items] |
2019 Annual incremental RAM adjusted revenues | 20.6
Annual change in accrued RBA balance as of December 31, 2019 (and associated revenue taxes) which incorporates MPIR recovery | (46.5)
Incremental Performance Incentive Mechanisms (net) | 2.2
Net annual incremental amount to be collected (refunded) under the tariffs | (23.7)
HELCO |
Regulatory Projects and Legal Obligations [Line Items] |
2019 Annual incremental RAM adjusted revenues | 3.2
Annual change in accrued RBA balance as of December 31, 2019 (and associated revenue taxes) which incorporates MPIR recovery | (9.9)
Incremental Performance Incentive Mechanisms (net) | (0.1)
Net annual incremental amount to be collected (refunded) under the tariffs | (6.8)
Maui Electric |
Regulatory Projects and Legal Obligations [Line Items] |
2019 Annual incremental RAM adjusted revenues | 5.7
Annual change in accrued RBA balance as of December 31, 2019 (and associated revenue taxes) which incorporates MPIR recovery | (11.0)
Incremental Performance Incentive Mechanisms (net) | (0.1)
Net annual incremental amount to be collected (refunded) under the tariffs | $ (5.4)

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