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Other Income, Net | 12 Months Ended
--- | ---
Dec. 31, 2024
Other Income and Expenses [Abstract] |
Other Income, Net | 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 The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 720 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/720/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Topic 610 -Publisher FASB -URI https://asc.fasb.org/610/tableOfContent + Details
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