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Supplemental Cash Flow Information (Tables) | 6 Months Ended
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Jun. 30, 2017
Supplemental Cash Flow Elements [Abstract] |
Supplemental Cash Flow Information |
| Six Months Ended
| June 30,
| 2017 |  | 2016
| (In millions of dollars)
Interest paid | $ | 10.4 |  |  | $ | 7.0 |
Non-cash investing and financing activities (included in Accounts payable): |  |  |
Unpaid purchases of property and equipment | $ | 4.1 |  |  | $ | 2.6 |
Stock repurchases not yet settled | $ | 0.6 |  |  | $ | 0.1 |
Acquisition of property and equipment through capital leasing arrangements | $ | 0.3 |  |  | $ | — |
Components of cash, cash equivalents and restricted cash: | June 30, 2017 |  |  | June 30, 2016 |
Cash and cash equivalents | $ | 57.1 |  |  | $ | 195.3 |
Restricted cash included in Prepaid expenses and other current assets | 0.3 |  |  | 0.3 |
Restricted cash included in Other assets | 13.0 |  |  | 11.0 |
Total cash, cash equivalents and restricted cash shown in the Statements of Consolidated Cash Flows | $ | 70.4 |  |  | $ | 206.6 |

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