XML 205 R175.htm IDEA: XBRL DOCUMENT v3.25.0.1
Employee Future Benefits - Status of Plans (Details) - CAD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of net defined benefit liability (asset) [line items]      
Net defined benefit liability (asset) $ (154) $ (162)  
Accrued current liabilities      
Disclosure of net defined benefit liability (asset) [line items]      
Net defined benefit liability (asset) (8) (7)  
Other long-term liabilities      
Disclosure of net defined benefit liability (asset) [line items]      
Net defined benefit liability (asset) (146) (155)  
Fair value of plan assets      
Disclosure of net defined benefit liability (asset) [line items]      
Net defined benefit liability (asset) 257 284 $ 289
Present value of defined benefit obligation      
Disclosure of net defined benefit liability (asset) [line items]      
Net defined benefit liability (asset) (411) (446)  
Registered      
Disclosure of net defined benefit liability (asset) [line items]      
Net defined benefit liability (asset) (62) (71)  
Registered | Accrued current liabilities      
Disclosure of net defined benefit liability (asset) [line items]      
Net defined benefit liability (asset) (1) (1)  
Registered | Other long-term liabilities      
Disclosure of net defined benefit liability (asset) [line items]      
Net defined benefit liability (asset) (61) (70)  
Registered | Fair value of plan assets      
Disclosure of net defined benefit liability (asset) [line items]      
Net defined benefit liability (asset) 241 269 274
Registered | Present value of defined benefit obligation      
Disclosure of net defined benefit liability (asset) [line items]      
Net defined benefit liability (asset) (303) (340) (345)
Supplemental      
Disclosure of net defined benefit liability (asset) [line items]      
Net defined benefit liability (asset) (74) (74)  
Supplemental | Accrued current liabilities      
Disclosure of net defined benefit liability (asset) [line items]      
Net defined benefit liability (asset) (6) (5)  
Supplemental | Other long-term liabilities      
Disclosure of net defined benefit liability (asset) [line items]      
Net defined benefit liability (asset) (68) (69)  
Supplemental | Fair value of plan assets      
Disclosure of net defined benefit liability (asset) [line items]      
Net defined benefit liability (asset) 16 15 15
Supplemental | Present value of defined benefit obligation      
Disclosure of net defined benefit liability (asset) [line items]      
Net defined benefit liability (asset) (90) (89) (85)
Other      
Disclosure of net defined benefit liability (asset) [line items]      
Net defined benefit liability (asset) (18) (17)  
Other | Accrued current liabilities      
Disclosure of net defined benefit liability (asset) [line items]      
Net defined benefit liability (asset) (1) (1)  
Other | Other long-term liabilities      
Disclosure of net defined benefit liability (asset) [line items]      
Net defined benefit liability (asset) (17) (16)  
Other | Fair value of plan assets      
Disclosure of net defined benefit liability (asset) [line items]      
Net defined benefit liability (asset) 0 0 0
Other | Present value of defined benefit obligation      
Disclosure of net defined benefit liability (asset) [line items]      
Net defined benefit liability (asset) $ (18) $ (17) $ (17)