v3.25.4
REGULATORY ASSETS AND LIABILITIES - Summary of Regulatory Assets and Liabilities (Details) - CAD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Regulatory assets:    
Total regulatory assets $ 3,867 $ 3,545
Less: current portion (10) (42)
Regulatory assets 3,857 3,503
Regulatory liabilities:    
Total regulatory liabilities 1,851 1,598
Less: current portion (230) (122)
Regulatory liabilities 1,621 1,476
Pension benefit regulatory liability    
Regulatory liabilities:    
Total regulatory liabilities 610 647
Post-retirement and post-employment benefits    
Regulatory liabilities:    
Total regulatory liabilities 336 376
Earnings sharing mechanism (ESM) deferral    
Regulatory liabilities:    
Total regulatory liabilities 310 150
Retail settlement variance account (RSVA)    
Regulatory liabilities:    
Total regulatory liabilities 242 157
External revenue variance    
Regulatory liabilities:    
Total regulatory liabilities 75 31
Capitalized overhead tax variance    
Regulatory liabilities:    
Total regulatory liabilities 50 38
Other post-employment benefits (OPEB) asymmetrical carrying charge variance    
Regulatory liabilities:    
Total regulatory liabilities 49 33
Asset removal costs cumulative variance    
Regulatory liabilities:    
Total regulatory liabilities 48 26
Tax rule changes variance    
Regulatory liabilities:    
Total regulatory liabilities 36 34
Pension cost differential variance    
Regulatory liabilities:    
Total regulatory liabilities 30 21
Advanced Metering Infrastructure (AMI) 2.0 variance    
Regulatory liabilities:    
Total regulatory liabilities 29 7
Deferred income tax regulatory liability    
Regulatory liabilities:    
Total regulatory liabilities 9 4
Distribution rate riders    
Regulatory liabilities:    
Total regulatory liabilities 0 45
Other    
Regulatory liabilities:    
Total regulatory liabilities 27 29
Deferred income tax regulatory asset    
Regulatory assets:    
Total regulatory assets 3,549 3,263
Broadband deferral    
Regulatory assets:    
Total regulatory assets 73 48
Post-retirement and post-employment benefits - non-service cost    
Regulatory assets:    
Total regulatory assets 49 72
Environmental    
Regulatory assets:    
Total regulatory assets 43 44
Getting Ontario Connected Act variance    
Regulatory assets:    
Total regulatory assets 39 24
Distribution rate riders    
Regulatory assets:    
Total regulatory assets 26 0
Incremental cloud computing implementation costs deferral    
Regulatory assets:    
Total regulatory assets 20 10
Stock-based compensation    
Regulatory assets:    
Total regulatory assets 18 24
Rural and remote rate protection (RRRP) variance    
Regulatory assets:    
Total regulatory assets 0 18
Other    
Regulatory assets:    
Total regulatory assets $ 50 $ 42