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Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Indefinite-Lived Intangible Assets
AccumulatedNet Book
($ millions)
CostAmortizationValue
2024
Computer software1,035 (493)542 
Land, transmission and water rights1,188 (210)978 
Other143 (95)48 
Assets under construction93  93 
2,459 (798)1,661 
2023
Computer software1,040 (528)512 
Land, transmission and water rights1,071 (182)889 
Other132 (81)51 
Assets under construction58 — 58 
2,301 (791)1,510 
Schedule of Intangible Assets
The service life ranges and weighted average remaining service life of finite-life intangible assets as at December 31 were as follows.
20242023
(years)Service Life
Ranges
Weighted
Average
Remaining
Service Life
Service Life
Ranges
Weighted
Average
Remaining
Service Life
Computer software
3-18
5
3-18
5
Land, transmission and water rights
30-85
52
30-90
52
Other
10-100
16
10-100
14
AccumulatedNet Book
($ millions)
CostAmortizationValue
2024
Computer software1,035 (493)542 
Land, transmission and water rights1,188 (210)978 
Other143 (95)48 
Assets under construction93  93 
2,459 (798)1,661 
2023
Computer software1,040 (528)512 
Land, transmission and water rights1,071 (182)889 
Other132 (81)51 
Assets under construction58 — 58 
2,301 (791)1,510