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Electric utility segment - Annual decoupling filings summary (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2021 USD ($)
Regulatory Projects and Legal Obligations [Line Items] |
2021 ARA revenues | $ 10.3
Management Audit savings commitment | (6.6)
Net incremental revenues | 3.7
Incremental RAM revenues and ARA revenues | (23.0)
Annual change in accrued RBA balance as of December 31, 2020 (and associated revenue taxes) | 25.0
Incremental Performance Incentive Mechanisms (net) | 0.7
Incremental MPIR/EPRM Revenue Adjustment | 12.8
Incremental Affiliate Transaction Refund/PUC Ordered Adjustment | 2.0
Net incremental amount to be collected under the RBA rate tariffs | 17.4
Hawaiian Electric, Parent |
Regulatory Projects and Legal Obligations [Line Items] |
2021 ARA revenues | 6.9
Management Audit savings commitment | (4.6)
Net incremental revenues | 2.3
Incremental RAM revenues and ARA revenues | (14.7)
Annual change in accrued RBA balance as of December 31, 2020 (and associated revenue taxes) | 10.4
Incremental Performance Incentive Mechanisms (net) | 0.0
Incremental MPIR/EPRM Revenue Adjustment | 12.6
Incremental Affiliate Transaction Refund/PUC Ordered Adjustment | 0.0
Net incremental amount to be collected under the RBA rate tariffs | 8.3
Hawaii Electric Light |
Regulatory Projects and Legal Obligations [Line Items] |
2021 ARA revenues | 1.7
Management Audit savings commitment | (1.0)
Net incremental revenues | 0.7
Incremental RAM revenues and ARA revenues | (2.2)
Annual change in accrued RBA balance as of December 31, 2020 (and associated revenue taxes) | 5.7
Incremental Performance Incentive Mechanisms (net) | 0.2
Incremental MPIR/EPRM Revenue Adjustment | 0.1
Net incremental amount to be collected under the RBA rate tariffs | 3.8
Maui Electric |
Regulatory Projects and Legal Obligations [Line Items] |
2021 ARA revenues | 1.7
Management Audit savings commitment | (1.0)
Net incremental revenues | 0.7
Incremental RAM revenues and ARA revenues | (6.1)
Annual change in accrued RBA balance as of December 31, 2020 (and associated revenue taxes) | 8.9
Incremental Performance Incentive Mechanisms (net) | 0.5
Incremental MPIR/EPRM Revenue Adjustment | 0.1
Incremental Affiliate Transaction Refund/PUC Ordered Adjustment | 2.0
Net incremental amount to be collected under the RBA rate tariffs | $ 5.3

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