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Goodwill
 12 Months Ended
Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill GOODWILL
($ millions)2024 2023 
Balance, beginning of year12,184 12,464 
Disposition of Aitken Creek (Note 21)
— (27)
Foreign currency translation impacts (1)
928 (253)
Balance, end of year13,112 12,184 
(1)    Relates to the translation of goodwill associated with the acquisitions of ITC, UNS Energy, Central Hudson, Caribbean Utilities and FortisTCI, whose functional currency is the U.S. dollar

No goodwill impairment was recognized by the Corporation in 2024 or 2023.