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Supplemental Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2015
Supplemental Cash Flow Elements [Abstract] |
Supplemental Cash Flow Information |
| Year Ended December 31,
| 2015 |  | 2014 |  | 2013
| (in millions of dollars)
Interest paid | $ | 22.1 |  |  | $ | 25.6 |  |  | $ | 28.1 |
Non-cash investing and financing activities: |  |  |  |  |
Stock repurchases not yet settled (accrued in accounts payable) | $ | 0.2 |  |  | $ | 0.8 |  |  | $ | 1.0 |
Unpaid purchases of property and equipment | $ | 10.5 |  |  | $ | 1.8 |  |  | $ | 4.4 |
Purchases of property and equipment through capital leasing arrangements | $ | — |  |  | $ | — |  |  | $ | 0.2 |

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- References No definition available. + Details
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