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Commitments, Contingencies and Guarantees (Tables) | 12 Months Ended
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Dec. 31, 2020
Other Provisions, Contingent Liabilities And Contingent Assets [Abstract] |
Disclosure of Detailed Information About Leases | The following table sets forth the adjustments to our operating lease commitments used to derive the lease obligations recognized on our initial application of IFRS 16:
Operating lease commitments at December 31, 2018 | $ | 107.4 |
Discounted using our incremental borrowing rate at January 1, 2019 | (13.2) |
Recognition exemption for short-term and low-value leases | (1.9) |
Extension options reasonably certain to be exercised | 19.7 |
Lease obligations recognized at January 1, 2019 under IFRS 16 | 112.0 |
Lease obligations previously classified as finance leases under IAS 17 | 10.4 |
Total lease obligations at January 1, 2019 | $ | 122.4 |
At December 31, 2020, the contractual undiscounted cash flows for our lease obligations were as follows:
Years ending December 31 |  |  | Total
2021 |  |  | $ | 37.1 |
2022 |  |  | 31.1 |
2023 |  |  | 24.4 |
2024 |  |  | 14.3 |
2025 |  |  | 10.1 |
Thereafter |  |  | 24.3 |
|  |  | $ | 141.3 |
Other lease related expenses that were recognized in the consolidated statement of operations are as follows:
Year ended December 31 | 2019 | 2020
Interest expense on lease obligations | $ | 6.6 |  | $ | 6.1 |
Variable lease payments not included in the measurement of lease obligations | $ | 0.7 |  | $ | 0.8 |
Expenses relating to short-term leases or low-value leases | $ | 4.6 |  | $ | 3.7 |
At December 31, 2020, we have commitments (that are not recognized as liabilities) under IT support agreements that require future minimum payments as follows:
2021 | $ | 21.4 |
2022 | 19.5 |
2023 | 17.2 |
2024 | 14.4 |
2025 | 12.4 |
Thereafter | 37.3 |
Total future minimum payments | $ | 122.2 |

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- Definition The disclosure of additional information about leasing activities of a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2020-01-01 -Paragraph 59 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2020-en-r&anchor=para_59&doctype=Standard -URIDate 2020-01-01 + Details
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