v3.26.3
Other comprehensive income (loss) information
 9 Months Ended
Sep. 30, 2026
Equity [Abstract]  
Other comprehensive income (loss) information Other comprehensive income (loss) information
Changes in accumulated other comprehensive income (loss):

millions of Canadian dollars2026 2025 
Balance at January 1(14)(214)
Postretirement benefits liability adjustment:
Current period change excluding amounts reclassified
       from accumulated other comprehensive income
9 12 
Amounts reclassified from accumulated other comprehensive income4 15 
Balance at September 30(1)(187)

Amounts reclassified out of accumulated other comprehensive income (loss) – before-tax income (expense):
      Third Quarter
       Nine Months
       to September 30
millions of Canadian dollars2026 2025 2026 2025 
Amortization of postretirement benefits liability adjustment
       included in net benefit cost (a)
1 (7)(5)(20)
(a) This accumulated other comprehensive income component is included in the computation of net benefit cost (note 4).

Income tax expense (credit) for components of other comprehensive income (loss):
      Third Quarter
       Nine Months
       to September 30
millions of Canadian dollars2026 2025 2026 2025 
Postretirement benefits liability adjustments:
Postretirement benefits liability adjustment (excluding amortization)4 — 3 4 
Amortization of postretirement benefits liability adjustment
       included in net benefit cost
— 2 1 5 
Total4 2 4 9