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Revenue (Tables) | 12 Months Ended
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Dec. 31, 2024
Revenue from Contract with Customer [Abstract] |
Schedule of Revenue | The following table presents the disaggregation of the Corporation's revenue on the consolidated statements of earnings by geography and substantially autonomous utility operations.
($ millions) | 2024 |  |  | 2023 |
Electric and gas revenue |  |  |
United States |  |  |
ITC | 2,205 |  |  | 2,098 |
UNS Energy | 2,731 |  |  | 2,707 |
Central Hudson | 1,366 |  |  | 1,329 |
Canada |  |  |
FortisBC Energy | 1,538 |  |  | 1,766 |
FortisAlberta | 770 |  |  | 699 |
FortisBC Electric | 481 |  |  | 460 |
Newfoundland Power | 770 |  |  | 759 |
Maritime Electric | 277 |  |  | 258 |
FortisOntario | 235 |  |  | 217 |
Caribbean |  |  |
Caribbean Utilities | 402 |  |  | 388 |
FortisTCI | 118 |  |  | 108 |
Total electric and gas revenue | 10,893 |  |  | 10,789 |
Other services revenue | 350 |  |  | 374 |
Revenue from contracts with customers | 11,243 |  |  | 11,163 |
Alternative revenue | 169 |  |  | 150 |
Other revenue | 96 |  |  | 204 |
Total revenue | 11,508 |  |  | 11,517 |

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- Definition Tabular disclosure of revenue from external customers by geographic areas attributed to the entity's country of domicile and to foreign countries from which the entity derives revenue. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-41 + Details
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