v3.19.2
financial instruments - Fair values Non-derivative (Details) - CAD ($)
$ in Millions
Jun. 30, 2019
Dec. 31, 2018
Disclosure of detailed information about financial instruments    
Long term Borrowings Current And Non current Excluding Lease Liabilities $ 15,025 $ 13,999
Measured at amortized cost but fair value disclosed    
Disclosure of detailed information about financial instruments    
Long term Borrowings Current And Non current Excluding Lease Liabilities 16,105 14,107
Carrying value    
Disclosure of detailed information about financial instruments    
Long term Borrowings Current And Non current Excluding Lease Liabilities $ 15,025 $ 13,999