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Other Assets (Tables) | 12 Months Ended
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Dec. 31, 2024
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
Schedule of Other Assets |
($ millions) | 2024 |  |  | 2023 |
Employee future benefits (Note 24) | 551 |  |  | 355 |
Equity investments (1) | 259 |  |  | 237 |
Other investments | 225 |  |  | 180 |
RECs (Note 8) | 176 |  |  | 155 |
Supplemental Executive Retirement Plan ("SERP") | 127 |  |  | 117 |
Operating leases (Note 15) | 64 |  |  | 51 |
Derivatives | 48 |  |  | 43 |
Deferred compensation plan | 29 |  |  | 22 |
Other | 174 |  |  | 138 |
| 1,653 |  |  | 1,298 |
(1) Includes investments in Belize Electricity and Wataynikaneyap Power

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- Definition Tabular disclosure of noncurrent assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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