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financial instruments - Liquidity risk (Details) - CAD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Liquidity risk |  |
Total | $ 24,205 | $ 22,478
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 April, 2018 |  |
Liquidity risk |  |
Debt or equity securities that may be offered pursuant to a shelf prospectus |  | 1,200
Non-interest bearing financial liabilities |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 2,782 | 2,420
Short-term borrowings |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 109 | 103
Construction credit facilities commitment |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 45 | 67
Long-term debt |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 21,439 | 19,762
Finance leases |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 106 |
Composite long-term debt |  |
Liquidity risk |  |
Total | 21,293 |
Other |  |
Liquidity risk |  |
Contractual maturities, derivative liabilities | 2 |
First year |  |
Liquidity risk |  |
Total | 3,772 | 4,360
First year | Non-interest bearing financial liabilities |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 2,372 | 2,232
First year | Short-term borrowings |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 3 | 103
First year | Construction credit facilities commitment |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 45 | 67
First year | Long-term debt |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 1,349 | 1,928
First year | Finance leases |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 55 |
2 years hence |  |
Liquidity risk |  |
Total | 1,867 | 1,573
2 years hence | Non-interest bearing financial liabilities |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 251 | 40
2 years hence | Short-term borrowings |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 3 |
2 years hence | Long-term debt |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 1,567 | 1,531
2 years hence | Finance leases |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 51 |
2 years hence | Other |  |
Liquidity risk |  |
Contractual maturities, derivative liabilities | 1 |
3 years hence |  |
Liquidity risk |  |
Total | 1,766 | 1,501
3 years hence | Non-interest bearing financial liabilities |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 102 | 19
3 years hence | Short-term borrowings |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 103 |
3 years hence | Long-term debt |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 1,567 | 1,480
4 years hence |  |
Liquidity risk |  |
Total | 2,099 | 1,577
4 years hence | Non-interest bearing financial liabilities |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 18 | 95
4 years hence | Long-term debt |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 2,086 | 1,480
4 years hence | Other |  |
Liquidity risk |  |
Contractual maturities, derivative liabilities | 1 |
5 years hence |  |
Liquidity risk |  |
Total | 899 | 1,933
5 years hence | Non-interest bearing financial liabilities |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 19 | 18
5 years hence | Long-term debt |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 886 | 1,913
5 years hence and 10 years before |  |
Liquidity risk |  |
Total | 6,190 | 5,900
5 years hence and 10 years before | Non-interest bearing financial liabilities |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 20 | 16
5 years hence and 10 years before | Long-term debt |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 6,240 | 5,796
Thereafter |  |
Liquidity risk |  |
Total | 7,612 | 5,634
Thereafter | Long-term debt |  |
Liquidity risk |  |
Contractual maturities, non-derivative liabilities | 7,744 | 5,634
Currency risk related to long-term debt | Currency swap agreement |  |
Liquidity risk |  |
Amounts to be exchanged, (Receive) | (5,138) | (2,955)
Amounts to be exchanged, Pay | 4,886 | 3,069
Currency risk related to long-term debt | Composite long-term debt |  |
Liquidity risk |  |
Total | 21,293 | 19,876
Currency risk related to long-term debt | First year | Currency swap agreement |  |
Liquidity risk |  |
Amounts to be exchanged, (Receive) | (877) | (1,188)
Amounts to be exchanged, Pay | 851 | 1,206
Currency risk related to long-term debt | 2 years hence | Currency swap agreement |  |
Liquidity risk |  |
Amounts to be exchanged, (Receive) | (95) | (44)
Amounts to be exchanged, Pay | 89 | 46
Currency risk related to long-term debt | 3 years hence | Currency swap agreement |  |
Liquidity risk |  |
Amounts to be exchanged, (Receive) | (95) | (44)
Amounts to be exchanged, Pay | 89 | 46
Currency risk related to long-term debt | 4 years hence | Currency swap agreement |  |
Liquidity risk |  |
Amounts to be exchanged, (Receive) | (95) | (44)
Amounts to be exchanged, Pay | 89 | 46
Currency risk related to long-term debt | 5 years hence | Currency swap agreement |  |
Liquidity risk |  |
Amounts to be exchanged, (Receive) | (95) | (44)
Amounts to be exchanged, Pay | 89 | 46
Currency risk related to long-term debt | 5 years hence and 10 years before | Currency swap agreement |  |
Liquidity risk |  |
Amounts to be exchanged, (Receive) | (1,917) | (1,591)
Amounts to be exchanged, Pay | 1,847 | 1,679
Currency risk related to long-term debt | Thereafter | Currency swap agreement |  |
Liquidity risk |  |
Amounts to be exchanged, (Receive) | (1,964) |
Amounts to be exchanged, Pay | 1,832 |
Currency risk related to foreign currency transactions | Currency swap agreement |  |
Liquidity risk |  |
Amounts to be exchanged, (Receive) | (542) | (545)
Amounts to be exchanged, Pay | 516 | 557
Currency risk related to foreign currency transactions | First year | Currency swap agreement |  |
Liquidity risk |  |
Amounts to be exchanged, (Receive) | (542) | (545)
Amounts to be exchanged, Pay | $ 516 | $ 557

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