XML 116 R47.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Income Taxes (Detail) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Schedule Of Income Tax [Line Items]      
Current income tax expense [1] $ 140 $ (14) $ (58)
Deferred income tax expense [1] (294) 773 150
Total income tax expense [1],[2] $ (154) $ 759 $ 92
Statutory corporate tax rate (percent) 26.00% 26.90% 26.90%
Disposals [3] (0.60%) (0.30%) (5.30%)
Enacted tax rate change [1] (31.90%)   0.90%
Other [4] (1.00%) (1.90%) (6.60%)
Effective income tax rate (7.50%) 24.70% 15.90%
[1] On June 28, 2019 the Alberta government enacted a 4 percent decrease in the provincial tax rate, from 12 percent to 8 percent by 2022. On November 2, 2017 the British Columbia government enacted a 1 percent increase in the provincial tax rate from 11 percent to 12 percent.
[2] Segment results in 2019 include a largely non-cash favourable impact of $662 million associated with the Alberta corporate income tax rate decrease, with the largest impact in the Upstream segment.
[3] 2017 disposals were primarily associated with the sale of surplus property in Ontario.
[4] Other decreases in 2017 and 2018 were primarily related to prior year adjustments and re-assessments.