v3.19.2

financial instruments - Market risks (Details) - CAD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018
Interest rate risk |  |
Market risks |  |
Percentage of reasonably possible changes in market risk variable | 0.25% | 0.25%
Other comprehensive income sensitivity to increase in risk variable | $ 4 | $ 4
Comprehensive income sensitivity to increase in risk variable | 4 | 4
Other comprehensive income sensitivity to decrease in risk variable | (4) | (3)
Comprehensive income sensitivity to decrease in risk variable | (4) | (3)
U.S. Dollars | Currency risk |  |
Market risks |  |
Other comprehensive income sensitivity to increase in risk variable | (55) | (17)
Comprehensive income sensitivity to increase in risk variable | (55) | (17)
Other comprehensive income sensitivity to decrease in risk variable | 55 | 17
Comprehensive income sensitivity to decrease in risk variable | $ 55 | $ 17
Equity contributed, Common shares |  |
Market risks |  |
Data period for share price volatility | 6 months | 6 months
Share price volatility for sensitivity analysis (as a per cent) | 12.50% | 7.70%
Equity contributed, Common shares | Other market risk |  |
Market risks |  |
Percentage of reasonably possible changes in market risk variable | 25.00% | 25.00%
Net income sensitivity to increase in risk variable | $ (4) | $ (15)
Other comprehensive income sensitivity to increase in risk variable | 1 | 20
Comprehensive income sensitivity to increase in risk variable | (3) | 5
Net income sensitivity to decrease in risk variable | 19 | 23
Other comprehensive income sensitivity to decrease in risk variable | (1) | (20)
Comprehensive income sensitivity to decrease in risk variable | $ 18 | $ 3

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