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Other Non-current Assets (Tables) | 12 Months Ended
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Dec. 31, 2017
Subclassifications of assets, liabilities and equities [abstract] |
Disclosure of Detailed Information About Non-current Assets |
| December 31
| 2016 |  | 2017
Net pension assets (note 19) | $ | 71.8 |  |  | $ | 62.9 |
Land rights | 11.0 |  |  | 10.5 |
Other | 5.2 |  |  | 7.9 |
| $ | 88.0 |  |  | $ | 81.3 |

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