Gains and Losses on Asset Sales (Parenthetical) (Detail) - CAD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||||
---|---|---|---|---|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
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Investment And Other Income [Line Items] | |||||||
Gain (loss) on asset sales, before- tax | [1] | $ 9 | $ 31 | $ 19 | $ 213 | ||
Gain (loss) on asset sales, after- tax | [1] | $ 8 | $ 28 | $ 15 | 186 | ||
Surplus Property | |||||||
Investment And Other Income [Line Items] | |||||||
Gain (loss) on asset sales, before- tax | 174 | ||||||
Gain (loss) on asset sales, after- tax | $ 151 | ||||||
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