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Income Taxes (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
INCOME TAXES |  |
Current year | $ 1,270 | $ 1,150
Adjustments to current income tax of prior years | (20) | 59
Origination and reversal of temporary differences | 345 | 476
Adjustments in respect of deferred income tax of prior years | 13 | (70)
Changes in tax rates and legislation |  | (106)
Movement in unrecognized deferred income tax assets | 82 | (51)
Total tax expense (income) | $ 1,690 | $ 1,458

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