|
|
|
2017 |
|
2016 |
|
||
|
|
|
|
|
|
|
||
|
Cost |
|
|
|
|
|
||
|
Balance at beginning of year |
|
$ |
5,688.2 |
|
$ |
5,601.1 |
|
|
Business acquisitions (note 11) |
|
0.4 |
|
87.1 |
|
||
|
|
|
|
|
|
|
||
|
Balance at end of year |
|
5,688.6 |
|
5,688.2 |
|
||
|
|
|
|
|
|
|
||
|
Accumulated amortization and impairment losses |
|
|
|
|
|
||
|
Balance at beginning of year |
|
2,962.8 |
|
2,922.7 |
|
||
|
Impairment losses (note 8) |
|
30.0 |
|
40.1 |
|
||
|
|
|
|
|
|
|
||
|
Balance at end of year |
|
2,992.8 |
|
2,962.8 |
|
||
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
||
|
Net carrying amount |
|
$ |
2,695.8 |
|
$ |
2,725.4 |
|
|
|
|
|
|
|
|
|
|