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Supplemental Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2021
Supplemental Cash Flow Elements [Abstract] |
Schedule of Supplemental Cash Flow Information |
|  | Year Ended December 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
|  | (in millions of dollars) |
Interest paid |  | $ | 48.7 |  |  | $ | 29.4 |  |  | $ | 23.6 |
Non-cash investing and financing activities (included in Accounts payable): |  |  |  |  |  |  |  |  |  |  |  |
Unpaid purchases of property and equipment |  | $ | 14.0 |  |  | $ | 4.5 |  |  | $ | 4.5 |
Supplemental lease disclosures: |  |  |  |  |  |  |  |  |  |  |  |
Operating lease liabilities arising from obtaining operating lease assets |  | $ | 27.8 |  |  | $ | 5.4 |  |  | $ | 1.8 |
Cash paid for amounts included in the measurement of operating lease liabilities |  | $ | 8.2 |  |  | $ | 4.5 |  |  | $ | 3.8 |
Finance lease liabilities arising from obtaining finance lease assets |  | $ | 2.2 |  |  | $ | 3.2 |  |  | $ | 1.0 |
|  | As of December 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Components of cash, cash equivalents and restricted cash: |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 303.2 |  |  | $ | 780.3 |  |  | $ | 264.3 |
Restricted cash included in Prepaid expenses and other current assets |  |  | — |  |  |  | — |  |  |  | 0.3 |
Restricted cash included in Other assets |  |  | 13.8 |  |  |  | 14.0 |  |  |  | 14.0 |
Total cash, cash equivalents and restricted cash shown in our Statements of Consolidated Cash Flows |  | $ | 317.0 |  |  | $ | 794.3 |  |  | $ | 278.6 |

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