v3.19.2
financial instruments - Liquidity risk (Details) - CAD ($)
$ in Millions
Aug. 02, 2019
Jun. 30, 2019
Dec. 31, 2018
Liquidity risk      
Total   $ 28,255 $ 24,205
Debt or equity securities pursuant to a shelf prospectus expiring June, 2020      
Liquidity risk      
Debt or equity securities that may be offered pursuant to a shelf prospectus     2,500
Debt or equity securities pursuant to a shelf prospectus expiring June, 2020 | Maximum      
Liquidity risk      
Debt or equity securities that may be offered pursuant to a shelf prospectus   100  
Debt or equity securities pursuant to a shelf prospectus expiring August, 2022      
Liquidity risk      
Debt or equity securities that may be offered pursuant to a shelf prospectus $ 3,000    
Non-interest bearing financial liabilities      
Liquidity risk      
Contractual maturities, non-derivative liabilities   2,865 2,782
Short-term borrowings      
Liquidity risk      
Contractual maturities, non-derivative liabilities   108 109
Construction credit facility commitment      
Liquidity risk      
Contractual maturities, non-derivative liabilities   28 45
Long-term debt      
Liquidity risk      
Contractual maturities, non-derivative liabilities     21,439
Long-term debt excluding leases      
Liquidity risk      
Contractual maturities, non-derivative liabilities   23,247  
Finance leases      
Liquidity risk      
Contractual maturities, non-derivative liabilities     106
Leases      
Liquidity risk      
Contractual maturities, non-derivative liabilities   2,018  
Composite long-term debt      
Liquidity risk      
Total   25,248  
Other      
Liquidity risk      
Contractual maturities, derivative liabilities   5 2
First year      
Liquidity risk      
Total   4,220 3,772
First year | Non-interest bearing financial liabilities      
Liquidity risk      
Contractual maturities, non-derivative liabilities   2,408 2,372
First year | Short-term borrowings      
Liquidity risk      
Contractual maturities, non-derivative liabilities   2 3
First year | Construction credit facility commitment      
Liquidity risk      
Contractual maturities, non-derivative liabilities   28 45
First year | Long-term debt      
Liquidity risk      
Contractual maturities, non-derivative liabilities     1,349
First year | Long-term debt excluding leases      
Liquidity risk      
Contractual maturities, non-derivative liabilities   1,610  
First year | Finance leases      
Liquidity risk      
Contractual maturities, non-derivative liabilities     55
First year | Leases      
Liquidity risk      
Contractual maturities, non-derivative liabilities   173  
2 years hence      
Liquidity risk      
Total   1,246 1,867
2 years hence | Non-interest bearing financial liabilities      
Liquidity risk      
Contractual maturities, non-derivative liabilities   339 251
2 years hence | Short-term borrowings      
Liquidity risk      
Contractual maturities, non-derivative liabilities   3 3
2 years hence | Long-term debt      
Liquidity risk      
Contractual maturities, non-derivative liabilities     1,567
2 years hence | Long-term debt excluding leases      
Liquidity risk      
Contractual maturities, non-derivative liabilities   571  
2 years hence | Finance leases      
Liquidity risk      
Contractual maturities, non-derivative liabilities     51
2 years hence | Leases      
Liquidity risk      
Contractual maturities, non-derivative liabilities   332  
2 years hence | Other      
Liquidity risk      
Contractual maturities, derivative liabilities     1
3 years hence      
Liquidity risk      
Total   2,054 1,766
3 years hence | Non-interest bearing financial liabilities      
Liquidity risk      
Contractual maturities, non-derivative liabilities   91 102
3 years hence | Short-term borrowings      
Liquidity risk      
Contractual maturities, non-derivative liabilities   103 103
3 years hence | Long-term debt      
Liquidity risk      
Contractual maturities, non-derivative liabilities     1,567
3 years hence | Long-term debt excluding leases      
Liquidity risk      
Contractual maturities, non-derivative liabilities   1,622  
3 years hence | Leases      
Liquidity risk      
Contractual maturities, non-derivative liabilities   239  
4 years hence      
Liquidity risk      
Total   2,331 2,099
4 years hence | Non-interest bearing financial liabilities      
Liquidity risk      
Contractual maturities, non-derivative liabilities   16 18
4 years hence | Long-term debt      
Liquidity risk      
Contractual maturities, non-derivative liabilities     2,086
4 years hence | Long-term debt excluding leases      
Liquidity risk      
Contractual maturities, non-derivative liabilities   2,120  
4 years hence | Leases      
Liquidity risk      
Contractual maturities, non-derivative liabilities   191  
4 years hence | Other      
Liquidity risk      
Contractual maturities, derivative liabilities   5 1
5 years hence      
Liquidity risk      
Total   1,124 899
5 years hence | Non-interest bearing financial liabilities      
Liquidity risk      
Contractual maturities, non-derivative liabilities   8 19
5 years hence | Long-term debt      
Liquidity risk      
Contractual maturities, non-derivative liabilities     886
5 years hence | Long-term debt excluding leases      
Liquidity risk      
Contractual maturities, non-derivative liabilities   944  
5 years hence | Leases      
Liquidity risk      
Contractual maturities, non-derivative liabilities   173  
Later than 5 years but before 10 years hence      
Liquidity risk      
Total   6,964 6,190
Later than 5 years but before 10 years hence | Non-interest bearing financial liabilities      
Liquidity risk      
Contractual maturities, non-derivative liabilities   3 20
Later than 5 years but before 10 years hence | Long-term debt      
Liquidity risk      
Contractual maturities, non-derivative liabilities     6,240
Later than 5 years but before 10 years hence | Long-term debt excluding leases      
Liquidity risk      
Contractual maturities, non-derivative liabilities   6,468  
Later than 5 years but before 10 years hence | Leases      
Liquidity risk      
Contractual maturities, non-derivative liabilities   482  
Thereafter      
Liquidity risk      
Total   10,316 7,612
Thereafter | Long-term debt      
Liquidity risk      
Contractual maturities, non-derivative liabilities     7,744
Thereafter | Long-term debt excluding leases      
Liquidity risk      
Contractual maturities, non-derivative liabilities   9,912  
Thereafter | Leases      
Liquidity risk      
Contractual maturities, non-derivative liabilities   428  
Currency risk related to long-term debt | Currency swap agreement      
Liquidity risk      
Amounts to be exchanged, (Receive)   (5,928) (5,138)
Amounts to be exchanged, Pay   5,911 4,886
Currency risk related to long-term debt | Composite long-term debt      
Liquidity risk      
Total   25,248 21,293
Currency risk related to long-term debt | First year | Currency swap agreement      
Liquidity risk      
Amounts to be exchanged, (Receive)   (356) (877)
Amounts to be exchanged, Pay   356 851
Currency risk related to long-term debt | 2 years hence | Currency swap agreement      
Liquidity risk      
Amounts to be exchanged, (Receive)   (119) (95)
Amounts to be exchanged, Pay   118 89
Currency risk related to long-term debt | 3 years hence | Currency swap agreement      
Liquidity risk      
Amounts to be exchanged, (Receive)   (119) (95)
Amounts to be exchanged, Pay   118 89
Currency risk related to long-term debt | 4 years hence | Currency swap agreement      
Liquidity risk      
Amounts to be exchanged, (Receive)   (119) (95)
Amounts to be exchanged, Pay   118 89
Currency risk related to long-term debt | 5 years hence | Currency swap agreement      
Liquidity risk      
Amounts to be exchanged, (Receive)   (119) (95)
Amounts to be exchanged, Pay   118 89
Currency risk related to long-term debt | Later than 5 years but before 10 years hence | Currency swap agreement      
Liquidity risk      
Amounts to be exchanged, (Receive)   (1,980) (1,917)
Amounts to be exchanged, Pay   1,991 1,847
Currency risk related to long-term debt | Thereafter | Currency swap agreement      
Liquidity risk      
Amounts to be exchanged, (Receive)   (3,116) (1,964)
Amounts to be exchanged, Pay   3,092 1,832
Currency risk related to foreign currency transactions | Currency swap agreement      
Liquidity risk      
Amounts to be exchanged, (Receive)   (494) (542)
Amounts to be exchanged, Pay   495 516
Currency risk related to foreign currency transactions | First year | Currency swap agreement      
Liquidity risk      
Amounts to be exchanged, (Receive)   (273) (542)
Amounts to be exchanged, Pay   272 $ 516
Currency risk related to foreign currency transactions | 2 years hence | Currency swap agreement      
Liquidity risk      
Amounts to be exchanged, (Receive)   (221)  
Amounts to be exchanged, Pay   $ 223