SHORT-TERM BORROWINGS - Short-term Borrowings (Details) $ in Millions, $ in Millions |
Dec. 31, 2025
CAD ($)
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
CAD ($)
|
Dec. 31, 2024
USD ($)
|
Dec. 31, 2023
CAD ($)
|
Dec. 31, 2023
USD ($)
|
|---|---|---|---|---|---|---|
| Disclosure of detailed information about borrowings [line items] | ||||||
| Total short-term borrowings | $ 4,000 | $ 2,959 | ||||
| Receivables securitization program | ||||||
| Disclosure of detailed information about borrowings [line items] | ||||||
| Total short-term borrowings | 2,000 | 2,000 | $ 1,600 | |||
| US commercial paper program (net of the discount on issuance) | ||||||
| Disclosure of detailed information about borrowings [line items] | ||||||
| Total short-term borrowings | 0 | $ 0 | 452 | $ 314 | 150 | $ 113 |
| Non-revolving credit facility borrowings (net of the discount on issuance) | ||||||
| Disclosure of detailed information about borrowings [line items] | ||||||
| Total short-term borrowings | $ 2,000 | $ 507 | $ 0 |