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Other Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2017
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Summary of Other Liabilities |
|  | Note |  |  | December 31 2017 $ |  |  | December 31 2016 $ |
Deferred gain on sale leaseback |  |  |  |  |  |  | 0.5 |  |  |  | 1.1 |
Lease inducement benefits |  |  |  |  |  |  | 57.2 |  |  |  | 50.3 |
Lease disadvantages |  |  |  |  |  |  | 2.7 |  |  |  | 4.8 |
Deferred share units payable |  |  | 25 |  |  |  | 15.5 |  |  |  | 16.2 |
Other cash-settled share-based compensation |  |  | 25 |  |  |  | 7.0 |  |  |  | 8.0 |
Liability for uncertain tax positions |  |  |  |  |  |  | 31.3 |  |  |  | 28.8 |
|  |  |  |  |  |  | 114.2 |  |  |  | 109.2 |
Less current portion |  |  |  |  |  |  | 22.2 |  |  |  | 20.8 |
Long-term portion |  |  |  |  |  |  | 92.0 |  |  |  | 88.4 |

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