v3.25.4
CONSOLIDATED STATEMENTS OF CASH FLOWS - Summary of Consolidated Statement of Cash Flows (Details) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Supplemental Cash Flow Information [Abstract]    
Accounts receivable $ (169) $ (81)
Due from related parties (84) (12)
Materials and supplies (1) 6
Prepaid expenses and other assets (Note 8) 2 (26)
Other long-term assets (5) (34)
Accounts payable (Note 13) 23 7
Accrued liabilities 95 136
Unearned revenue (Note 13) (23) 125
Due to related parties 137 40
Accrued interest (Note 13) 23 31
Long-term accounts payable and other long-term liabilities (9) 8
Post-retirement and post-employment benefit liability 64 49
Changes in non-cash balances related to operations 53 249
Capital Expenditure [Abstract]    
Capital investments, property, plant and equipment (3,289) (2,968)
Capital investments, intangible assets (77) (95)
Capital investments, total (3,366) (3,063)
Reconciling items, property plant and equipment 319 248
Reconciling items, intangible assets (3) 7
Reconciling items, total 316 255
Cash outflow for capital expenditures, property plant and equipment (2,970) (2,720)
Cash outflow for capital expenditures, intangible assets (80) (88)
Cash outflow for capital expenditures, total (3,050) (2,808)
Net interest paid 724 643
Income taxes paid $ 45 $ 35