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Other Income, Net (Tables) | 12 Months Ended
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Dec. 31, 2024
Other Income and Expenses [Abstract] |
Schedule of Other Income, Net |
($ millions) | 2024 |  |  | 2023 |
Equity component of AFUDC | 139 |  |  | 101 |
Non-service component of net periodic benefit cost | 73 |  |  | 62 |
Interest income (1) | 64 |  |  | 76 |
Equity income | 14 |  |  | 14 |
Gain on disposal of Aitken Creek, pre-tax (Note 21) | — |  |  | 23 |
Gain on derivatives, net | — |  |  | 9 |
Net foreign exchange (loss) gain | (10) |  |  | 4 |
Other | 8 |  |  | 2 |
| 288 |  |  | 291 |
(1) Includes interest on short-term deposits, as well as interest on regulatory deferrals, including the PPFAC at TEP and UNS Electric

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- Definition Tabular disclosure of the components of non-operating income or non-operating expense that may include amounts earned from dividends, interest on securities, gains (losses) on securities sold, equity earnings of unconsolidated affiliates, net gain (loss) on sales of business, interest expense and other miscellaneous income or expense items. + References No definition available. + Details
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