contingent liabilities (Details) - Claims and lawsuits $ in Millions |
6 Months Ended | 12 Months Ended | 30 Months Ended |
|---|---|---|---|
|
Jun. 30, 2019
CAD ($)
|
Dec. 31, 2016
item
|
Jun. 30, 2019
item
|
|
| 4G LTE Network patent infringement claim | |||
| Claims and lawsuits | |||
| Number of third-party patents involved in patent infringement claim | 3 | ||
| Number of third-party patent infringement claims abandoned | 2 | ||
| Area Code 867 blocking claim | |||
| Claims and lawsuits | |||
| Damages sought | $ | $ 135 |