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Commitments (Tables) | 12 Months Ended
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Dec. 31, 2018
Text block [abstract] |
Summary of Future Minimum Lease Payments Payable Under Noncancellable Operating Leases | The Company’s commitments including future minimum lease payments payable under noncancellable operating leases as at December 31, 2018, are as follows:
|  | $ |
Within one year |  |  | 252.3 |
After one year but not more than five years |  |  | 638.5 |
More than five years |  |  | 400.0 |
Total commitments |  |  | 1,290.8 |
Variable payments and non-lease elements |  |  | (320.3 | )
Purchase obligations |  |  | (68.0 | )
Total minimum lease payments |  |  | 902.5 |

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