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Profit on Disposal, Net (Tables) | 12 Months Ended
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Dec. 31, 2013
Other Income And Expenses [Abstract] |
Summary of Profit on Disposal, Net |
(in millions) |  | 2013 |  |  | 2012 |  |  | 2011 |
Profit on disposal of surplus United Kingdom real estate |  | $ | 0.0 |  |  | $ | 0.1 |  |  | $ | 0.0 |
Loss on disposal of surplus U.S. real estate |  |  | 0.0 |  |  |  | 0.0 |  |  |  | 0.0 |
|  | $ | 0.0 |  |  | $ | 0.1 |  |  | $ | 0.0 |

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