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v3.25.0.1

Revenue - Schedule of Revenue (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | $ 11,243 | $ 11,163
Alternative revenue | 169 | 150
Other revenue | 96 | 204
Revenues | 11,508 | 11,517
Electric and Gas Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 10,893 | 10,789
Other ServicesRrevenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 350 | 374
ITC | United States | Electric and Gas Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 2,205 | 2,098
UNS Energy | United States | Electric and Gas Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 2,731 | 2,707
Central Hudson | United States | Electric and Gas Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 1,366 | 1,329
FortisBC Energy | Canada | Electric and Gas Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 1,538 | 1,766
FortisAlberta | Canada | Electric and Gas Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 770 | 699
FortisBC Electric | Canada | Electric and Gas Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 481 | 460
Newfoundland Power | Canada | Electric and Gas Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 770 | 759
Maritime Electric | Canada | Electric and Gas Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 277 | 258
FortisOntario | Canada | Electric and Gas Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 235 | 217
Caribbean Utilities | Caribbean | Electric and Gas Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | 402 | 388
FortisTCI | Caribbean | Electric and Gas Revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contracts with customers | $ 118 | $ 108

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