v3.25.0.1
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 AFUDC139 101 
Non-service component of net periodic benefit cost73 62 
Interest income (1)
64 76 
Equity income14 14 
Gain on disposal of Aitken Creek, pre-tax (Note 21)— 23 
Gain on derivatives, net— 9 
Net foreign exchange (loss) gain(10)4 
Other8 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