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Other Assets and Other Liabilities | 12 Months Ended
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Dec. 31, 2014
Other Assets and Other Liabilities [Abstract] |
Other Assets and Other Liabilities | The following table shows the components of other assets reported on our balance sheets as of December 31 (in millions):
| 2014 |  | 2013
Inventory | $ | 52.0 |  |  | $ | 45.8 |
Office furniture, fixtures and other equipment, net of accumulated depreciation | 34.1 |  |  | 34.9 |
Derivatives | 11.5 |  |  | 6.0 |
Deferred financing costs | 21.6 |  |  | 18.6 |
Assets held for sale | 7.0 |  |  | 10.3 |
Other investments | 6.0 |  |  | 6.9 |
Prepaid items | 12.4 |  |  | 12.4 |
Prepaid pension | — |  |  | 32.9 |
Other | 84.4 |  |  | 57.7 |
| $ | 229.0 |  |  | $ | 225.5 |
The following table shows the components of other liabilities reported on our balance sheets as of December 31 (in millions):
| 2014 |  | 2013
Accrued operating lease expense | $ | 43.4 |  |  | $ | 48.6 |
Accrued pension and other post-retirement benefits | 86.6 |  |  | 68.2 |
Deferred gains on sale-leasebacks | 49.0 |  |  | 53.3 |
Unrecognized tax benefits | 3.6 |  |  | 3.9 |
Environmental accruals | 13.8 |  |  | 14.7 |
Deferred income | 5.6 |  |  | 6.7 |
Derivatives | 7.5 |  |  | 3.6 |
Other | 36.6 |  |  | 31.6 |
| $ | 246.1 |  |  | $ | 230.6 |

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