v3.26.3
COMPONENTS OF ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - CAD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Changes in AOCI    
Balance at beginning of year $ 62,333  
Other comprehensive income/(loss) retained in AOCI 2,144 $ (1,754)
Other comprehensive (income)/loss reclassified to earnings [1] (27) (24)
Other comprehensive (income)/loss reclassified to earnings 2,254 (1,755)
Income tax on amounts retained in AOCI (65) (9)
Income tax on amounts reclassified to earnings (25) 1
Tax impact (90) (8)
Balance at end of year 67,572  
Interest rate contracts    
Changes in AOCI    
Other comprehensive (income)/loss reclassified to earnings [2] 137 26
Foreign exchange contracts    
Changes in AOCI    
Other comprehensive (income)/loss reclassified to earnings [3]   (3)
Total    
Changes in AOCI    
Balance at beginning of year 4,681 7,115
Balance at end of year 6,845 5,352
Cash Flow Hedges    
Changes in AOCI    
Balance at beginning of year 462 407
Other comprehensive income/(loss) retained in AOCI 184 (22)
Other comprehensive (income)/loss reclassified to earnings 321 4
Income tax on amounts retained in AOCI (44)  
Income tax on amounts reclassified to earnings (34) (4)
Tax impact (78) (4)
Balance at end of year 705 407
Cash Flow Hedges | Interest rate contracts    
Changes in AOCI    
Other comprehensive (income)/loss reclassified to earnings [2] 137 26
Excluded Components of Fair Value Hedges    
Changes in AOCI    
Balance at beginning of year   (14)
Other comprehensive income/(loss) retained in AOCI   12
Other comprehensive (income)/loss reclassified to earnings   9
Income tax on amounts retained in AOCI   4
Income tax on amounts reclassified to earnings   1
Tax impact   5
Balance at end of year   0
Excluded Components of Fair Value Hedges | Foreign exchange contracts    
Changes in AOCI    
Other comprehensive (income)/loss reclassified to earnings [3]   (3)
Net Investment Hedges    
Changes in AOCI    
Balance at beginning of year (1,614) (2,033)
Other comprehensive income/(loss) retained in AOCI (525) 216
Other comprehensive (income)/loss reclassified to earnings (525) 216
Tax impact 0 0
Balance at end of year (2,139) (1,817)
Cumulative Translation Adjustment    
Changes in AOCI    
Balance at beginning of year 5,372 8,452
Other comprehensive income/(loss) retained in AOCI 2,512 (2,048)
Other comprehensive (income)/loss reclassified to earnings 2,512 (2,048)
Tax impact 0 0
Balance at end of year 7,884 6,404
Equity Investees and Other Investments    
Changes in AOCI    
Balance at beginning of year 25 1
Other comprehensive income/(loss) retained in AOCI (27) 26
Other comprehensive (income)/loss reclassified to earnings (27) 26
Income tax on amounts retained in AOCI (21)  
Tax impact (21) 0
Balance at end of year 23 27
Pension and OPEB Adjustment    
Changes in AOCI    
Balance at beginning of year 436 302
Other comprehensive income/(loss) retained in AOCI   62
Other comprehensive (income)/loss reclassified to earnings [1] (27) (24)
Other comprehensive (income)/loss reclassified to earnings (27) 38
Income tax on amounts retained in AOCI   (13)
Income tax on amounts reclassified to earnings 9 4
Tax impact 9 (9)
Balance at end of year $ 418 $ 331
[1] These components are included in the computation of net periodic benefit credit and are reported within Other income/(expense) in the Consolidated Statements of Earnings.
[2] Reported within Interest expense in the Consolidated Statements of Earnings.
[3] Reported within Interest expense and Other income/(expense) in the Consolidated Statements of Earnings