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Employee Benefits (Summary of Expected Future Benefit Payments) (Details)
$ in Millions
Oct. 31, 2025
CAD ($)
Principal Pension Plans [Member]  
Disclosure of expected future benefit payments [Line Items]  
2026 $ 435
2027 458
2028 484
2029 506
2030 527
2031-2035 2,918
Total 5,328
Principal post-retirement benefit plan [Member]  
Disclosure of expected future benefit payments [Line Items]  
2026 22
2027 23
2028 24
2029 24
2030 25
2031-2035 134
Total 252
Other pension plans [Member]  
Disclosure of expected future benefit payments [Line Items]  
2026 165
2027 167
2028 168
2029 169
2030 170
2031-2035 830
Total $ 1,669