XML 106 R88.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Regulatory Assets and Liabilities - Canada Electric Utilities (Narrative) (Details) - CAD ($) |  |  |  |  |  | 12 Months Ended | 24 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 27, 2024 | Apr. 30, 2024 | Apr. 17, 2024 | Jul. 05, 2023 | Aug. 15, 2021 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2023 | Nov. 29, 2024 | Sep. 24, 2024 | Dec. 21, 2023 | Mar. 31, 2023
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Contractual Obligation, to be Paid, Year One |  |  |  |  |  | $ 2,404,000,000 |  |  |  |  |  |  |
NSPI |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amended, Percentage |  |  |  |  |  | 6.50% | 6.90% |  |  |  |  |  |
Storm cost |  |  |  |  |  | $ 10,000,000 | $ 10,000,000 |  |  |  |  |  |
NSPI | Nova Scotia Cap-and-Trade ("Cap-and-Trade") Program |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Gas costs |  |  |  |  |  |  |  | $ 166,000,000 |  |  |  |  |
Credits purchased from provincial auctions |  |  |  |  |  |  | $ 6,000,000 | 6,000,000 |  |  |  |  |
Compliance costs accrued |  |  |  |  |  |  |  |  |  |  |  |  | $ (166,000,000)
NSPI | Fuel |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Approved payment in period |  |  | $ 117,000,000 |  |  |  |  |  |  |  |  |  |
Holdback payable |  | $ 117,000,000 |  |  |  |  |  |  |  |  |  |  |
Amortization and financing costs |  | $ 117,000,000 |  |  |  |  |  |  |  |  |  |  |
Collection period of amortization and financing costs |  | 10 years |  |  |  |  |  |  |  |  |  |  |
NSPI | NSP Maritime Link Inc. |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Federal loan guarantee issued amount |  |  |  |  |  | $ 500,000,000 |  |  |  |  | $ 500,000,000 |  |
Recovery period for federal loan guarantee related financing costs |  |  |  |  |  | 28 years |  |  |  |  |  |  |
Storm cost |  |  |  |  |  | $ 24,000,000 |  |  |  |  |  |  |
Costs recovery period |  |  |  |  |  | 12 months |  |  |  |  |  |  |
NSPI | Range, Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Approved regulated return on equity |  |  |  |  |  | 8.75% | 8.75% |  |  |  |  |  |
NSPI | Range, Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Approved regulated return on equity |  |  |  |  |  | 9.25% | 9.25% |  |  |  |  |  |
Regulated common equity component |  |  |  |  |  | 40.00% |  |  |  |  |  |  |
NSPI | NSPI FAM |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Increase to regulatory assets |  |  |  | $ 51,000,000 |  |  |  |  |  |  |  |  |
NSPI | UARB |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Costs recovery period | 10 years |  |  |  |  |  |  |  |  |  |  |  |
Amount approved to defer operating costs incurred from storm restoration | $ 25,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Amount reclassified from other long term assets to regulatory assets | 25,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Amount reclassified from undepreciated costs to regulatory assets | $ 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |
NSPI | UARB | NSP Maritime Link Inc. |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Estimate of possible percentage of receiving deliveries |  |  |  |  |  | 90.00% |  |  |  |  |  |  |
Emera Newfoundland and Labrador Holdings Inc. |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Contractual Obligation, to be Paid, Year One |  |  |  |  |  |  |  |  |  | $ 197,000,000 |  |  |
Emera Newfoundland and Labrador Holdings Inc. | Debt and Financing Costs [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Contractual Obligation, to be Paid, Year One |  |  |  |  |  |  |  |  |  | 39,000,000 |  |  |
Emera Newfoundland and Labrador Holdings Inc. | NSP Maritime Link Inc. |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Equity ratio |  |  |  |  |  | 30.00% |  |  |  |  |  |  |
Holdback payable |  |  |  |  |  | $ 0 | $ 4,000,000 |  |  |  |  |  |
Contractual Obligation, to be Paid, Year One |  |  |  |  |  |  |  |  |  | $ 158,000,000 |  | $ 164,000,000 |
Energy Delivery Commitments and Contracts, Term |  |  |  |  | 35 years |  |  |  |  |  |  |  |
Emera Newfoundland and Labrador Holdings Inc. | Range, Minimum | NSP Maritime Link Inc. |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Approved regulated return on equity |  |  |  |  |  | 8.75% |  |  |  |  |  |  |
Emera Newfoundland and Labrador Holdings Inc. | Range, Maximum | NSP Maritime Link Inc. |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Approved regulated return on equity |  |  |  |  |  | 9.25% |  |  |  |  |  |  |
Emera Newfoundland and Labrador Holdings Inc. | UARB | NSP Maritime Link Inc. |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Holdback payable |  |  |  |  |  |  | 4,000,000 | 8,000,000 | $ 12,000,000 |  |  |  |
Monthly holdback amount |  |  |  |  |  |  | $ 4,000,000 | $ 2,000,000 |  |  |  |  |
Percent of contracted annual amount |  |  |  |  |  | 10.00% |  |  |  |  |  |  |

X
- Definition Amortization And Financing Costs + References No definition available. + Details
Name: | ema_AmortizationAndFinancingCosts
Namespace Prefix: | ema_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | ema_AmountApprovedToDeferOperatingCostsIncurredFromStormRestoration
Namespace Prefix: | ema_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | ema_AmountReclassifiedFromOtherLongTermAssetsToRegulatoryAssets
Namespace Prefix: | ema_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | ema_AmountReclassifiedFromUndepreciatedCostsToRegulatoryAssets
Namespace Prefix: | ema_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Collection Period Of Amortization And Financing Costs + References No definition available. + Details
Name: | ema_CollectionPeriodOfAmortizationAndFinancingCosts
Namespace Prefix: | ema_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Compliance Costs Accrued + References No definition available. + Details
Name: | ema_ComplianceCostsAccrued
Namespace Prefix: | ema_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Credits Purchased From Provincial Auctions + References No definition available. + Details
Name: | ema_CreditsPurchasedFromProvincialAuctions
Namespace Prefix: | ema_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The duration period applicable to the existing commitments related to energy delivery over a number of years. + References No definition available. + Details
Name: | ema_EnergyDeliveryCommitmentsAndContractsTerm
Namespace Prefix: | ema_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity ratio + References No definition available. + Details
Name: | ema_EquityRatio
Namespace Prefix: | ema_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Estimate of possible percentage of receiving deliveries + References No definition available. + Details
Name: | ema_EstimateOfPossiblePercentageOfReceivingDeliveries
Namespace Prefix: | ema_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | ema_FederalLoanGuaranteeIssuedAmount
Namespace Prefix: | ema_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Monthly Holdback Amount + References No definition available. + Details
Name: | ema_MonthlyHoldbackAmount
Namespace Prefix: | ema_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percent of contracted annual amount + References No definition available. + Details
Name: | ema_PercentOfContractedAnnualAmount
Namespace Prefix: | ema_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | ema_RecoveryPeriodForFederalLoanGuaranteeRelatedFinancingCosts
Namespace Prefix: | ema_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of contractual obligation to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
Name: | us-gaap_ContractualObligationDueInNextTwelveMonths
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fuel costs incurred that are directly related to goods produced and sold and services rendered during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(2)(d)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(2)(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
Name: | us-gaap_FuelCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The increase (decrease) during the reporting period in the value of other assets that are created when regulatory agencies permits public utilities to defer costs to the balance sheet. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
Name: | us-gaap_IncreaseDecreaseInOtherRegulatoryAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of cash outflow reducing loss contingency liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-1 + Details
Name: | us-gaap_LossContingencyAccrualPayments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-1 + Details
Name: | us-gaap_LossContingencyAccrualProvision
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of public utility's approved return on equity. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesGeneralDisclosuresLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of public utility's requested equity to capital, including debt and equity. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesRequestedEquityCapitalStructurePercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of public utility's amended requested rate increase (decrease) with regulatory agency. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmendedPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amortization period for the recovery of regulatory asset, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_RegulatoryAssetAmortizationPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition A noncash adjustment to the provision established for storm damage by an oil, gas, or utility company. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
Name: | us-gaap_StormDamageProvision
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=ema_NovaScotiaPowerIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=ema_NovaScotiaCapAndTradeCapAndTradeProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=srt_FuelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=ema_NspMaritimeLinkIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_RevenueSubjectToRefundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAgencyAxis=ema_UtilityAndReviewBoardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=ema_EmeraNewfoundlandAndLabradorHoldingsIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=ema_DebtAndFinancingCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |