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Contingencies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract] |
Estimated Future Settlement Of Existing Claims [Table Text Block] |
| December 31,
(millions of dollars) | 2015 |  | 2014
Assets: |  |  |  |  |
Other non-current assets | $ | 108.5 |  |  | $ | 111.8 |
Total insurance assets | $ | 108.5 |  |  | $ | 111.8 |
Liabilities: |  |  |  |  |
Accounts payable and accrued expenses | $ | 47.7 |  |  | $ | 47.4 |
Other non-current liabilities | 60.8 |  |  | 64.4 |
Total accrued liabilities | $ | 108.5 |  |  | $ | 111.8 |

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