restructuring and other costs (Details) - CAD ($) $ in Millions |
3 Months Ended | 6 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Dec. 31, 2018 |
|
| restructuring and other costs | ||||||
| Goods and services purchased | $ 8 | $ 10 | $ 26 | $ 15 | ||
| Employee benefits expense | 21 | 25 | 39 | 54 | ||
| Total | 29 | 35 | 65 | 69 | $ 313 | $ 317 |
| Restructuring | ||||||
| restructuring and other costs | ||||||
| Goods and services purchased | 7 | 7 | 19 | 11 | ||
| Employee benefits expense | 19 | 23 | 34 | 51 | ||
| Total | 26 | 30 | 53 | 62 | ||
| Other | ||||||
| restructuring and other costs | ||||||
| Goods and services purchased | 1 | 3 | 7 | 4 | ||
| Employee benefits expense | 2 | 2 | 5 | 3 | ||
| Total | $ 3 | $ 5 | $ 12 | $ 7 | ||