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Regulatory Assets and Liabilities - Gas Utilities and Infrastructure (Narrative) (Details) $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Mar. 01, 2024 CAD ($) | Nov. 09, 2023 | Dec. 31, 2024 CAD ($) km
Emera Brunswick Pipeline Company Limited |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Length Of Pipeline | km |  |  | 145
Public Utilities, Property, Plant and Equipment, Transmission and Distribution, Useful Life |  |  | 25 years
NMGC |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Approved regulated return on equity | 9.375% |  | 9.375%
Allowed equity capital structure |  |  | 52.00%
Public Utilities, Requested Rate Increase (Decrease), Amount | $ 30 |  |
PGS |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Allowed equity capital structure |  |  | 54.70%
PGS | Scenario Plan |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Phase-in Plan, Amount of Capitalized Costs Recovered |  |  | $ 11
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  | 118
PGS | Cast Iron/Bare Steel Pipe Replacement | Scenario Plan |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Allowed equity capital structure |  | 54.70% |
Phase-in Plan, Amount of Capitalized Costs Recovered |  |  | $ 107
PGS | Range, Minimum |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Approved regulated return on equity |  |  | 9.15%
PGS | Range, Maximum |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Approved regulated return on equity |  |  | 11.15%
PGS | Midpoint |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Approved regulated return on equity |  |  | 10.15%
PGS | Midpoint | Cast Iron/Bare Steel Pipe Replacement | Scenario Plan |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Approved regulated return on equity |  | 10.15% |

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