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Summary of Significant Accounting Policies (Nature of Operations) (Narrative) (Details) $ in Billions |  | 12 Months Ended
--- | --- | ---
Jun. 04, 2024 | Dec. 31, 2024 CAD ($) MW Customers km
Labrador-Island Link Limited Partnership |  |
Nature of operations [Line items] |  |
Percent of equity interest sold | 31.10% |
Operating | Canadian Electric Utilities | NSP Maritime Link Inc Project |  |
Nature of operations [Line items] |  |
Public Utilities, Equipment, Transmission and Distribution | $ |  | $ 1.8
100% ownership |  | 100.00%
Labrador-Island Link Limited Partnership | Equity Method Investee |  |
Nature of operations [Line items] |  |
Equity Method Investment, Ownership Percentage |  | 0.00%
Maritimes and Northeast Pipeline | Equity Method Investee |  |
Nature of operations [Line items] |  |
Equity Method Investment, Ownership Percentage |  | 12.90%
Maritimes and Northeast Pipeline | Operating | Gas Utilities and Infrastructure |  |
Nature of operations [Line items] |  |
Length Of Pipeline | km |  | 1,400
St. Lucia Electricity Services Limited | Equity Method Investee |  |
Nature of operations [Line items] |  |
Equity Method Investment, Ownership Percentage |  | 19.50%
Bear Swamp Power Company LLC | Equity Method Investee |  |
Nature of operations [Line items] |  |
Equity Method Investment, Ownership Percentage |  | 50.00%
Public Utilities Property Plant And Equipment Generation Capacity | MW |  | 660
Tampa Electric | Operating | Florida Electric Utility |  |
Nature of operations [Line items] |  |
Number of Customers |  | 855,000
Nova Scotia Power Inc. | Operating | Canadian Electric Utilities |  |
Nature of operations [Line items] |  |
Number of Customers |  | 557,000
Barbados Light and Power Company Limited | Operating | Other Electric Utilities |  |
Nature of operations [Line items] |  |
Number of Customers |  | 135,000
Grand Bahama Power Company Limited | Operating | Other Electric Utilities |  |
Nature of operations [Line items] |  |
Number of Customers |  | 19,500
Peoples Gas System Division | Gas Utilities and Infrastructure |  |
Nature of operations [Line items] |  |
Number of Customers |  | 508,000
New Mexico Gas Company | Gas Utilities and Infrastructure |  |
Nature of operations [Line items] |  |
Number of Customers |  | 550,000
Emera Brunswick Pipeline Company Limited |  |
Nature of operations [Line items] |  |
Length Of Pipeline | km |  | 145
Emera Brunswick Pipeline Company Limited | Gas Utilities and Infrastructure |  |
Nature of operations [Line items] |  |
Public Utilities, Property, Plant and Equipment, Distribution, Useful Life |  | 25 years
Emera Energy | Bear Swamp Power Company LLC | Other |  |
Nature of operations [Line items] |  |
Equity Method Investment, Ownership Percentage |  | 50.00%
Brooklyn Power Corporation | Operating | Other |  |
Nature of operations [Line items] |  |
Public Utilities Property Plant And Equipment Generation Capacity | MW |  | 30

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