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Short-Term Debt (Narrative) (Details) - CAD ($) $ in Millions |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 24, 2024 | Jun. 17, 2024 | Dec. 31, 2024 | Dec. 31, 2024 | Apr. 01, 2024 | Dec. 31, 2023
Line of Credit Facility [Line Items] |  |  |  |  |  |
Weighted average interest rate |  |  | 5.05% | 5.05% |  | 5.95%
Revolving credit facility | TEC |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  | $ 1,151 | $ 1,151 |  | $ 401
Revolving credit facility | TEC | Florida Electric Utility [Member] |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  | $ 800 |
Debt Instrument, Maturity Date |  |  |  | Dec. 17, 2026 |  |
Debt Instrument, Maturity Date Extended |  |  |  | Dec. 01, 2028 |  |
Revolving credit facility | NMGC |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  | 180 | $ 180 |  | 165
Revolving credit facility | TECO Finance |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  | 576 | $ 576 |  | 529
Revolving credit facility | TECO Finance | Other Segments [Member] |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  | $ 400 |
Debt Instrument, Maturity Date |  |  |  | Dec. 17, 2026 |  |
Debt Instrument, Maturity Date Extended |  |  |  | Dec. 01, 2028 |  |
Revolving credit facility | Peoples Gas System [Member] |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  | 360 | $ 360 |  | 331
Revolving credit facility II | TEC |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  | 0 | 0 |  | 265
Revolving credit facility II | Emera Inc. | Other Segments [Member] |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 400 | 200 | 200 |  |
Repayments of credit facility |  | $ 200 | 200 |  |  |
Revolving credit facility III | TEC |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  | $ 0 | $ 0 |  | $ 265
Non-revolving term facilities | Emera Inc. |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Weighted average interest rate |  |  | 0.00% | 0.00% |  | 6.07%
Line of Credit Facility, Maximum Borrowing Capacity |  |  | $ 0 | $ 0 |  | $ 400
Non-revolving term facilities | Emera Inc. | Other Segments [Member] |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Repayments of credit facility | $ 400 |  |  |  |  |
Non-revolving term loan II | Emera Inc. |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  | $ 0 | $ 0 |  | $ 400

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