v3.19.2

income taxes - Expense composition (Details) - CAD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Current income tax expense |  |  |  |
For the current reporting period | $ 71 | $ 139 | $ 197 | $ 283
Adjustments recognized in the current period for income taxes of prior periods | (1) | (8) | (1) | (8)
Total | 70 | 131 | 196 | 275
Deferred income tax expense (recovery) |  |  |  |
Arising from the origination and reversal of temporary differences | 83 | 6 | 114 | 13
Revaluation of deferred income tax liability to reflect future income tax rates | (121) |  | (121) |
Adjustments recognized in the current period for income taxes of prior periods | (1) | 8 | (1) | 8
Total | (39) | 14 | (8) | 21
Income taxes | $ 31 | $ 145 | $ 188 | $ 296

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