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Schedule V Valuation and Qualifying Accounts (Tables) | 12 Months Ended
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Dec. 31, 2012
Schedule V - Valuation and Qualifying Accts [Abstract] |
VALUATION AND QUALIFYING ACCOUNTS |
Description | Balance at Beginning of Period |  | Additions Charged to Costs and Expenses |  | Additions Charged to Other Accounts (1) |  | Deductions (2) |  | Balance at End of Period
| (in millions of dollars)
Year Ended December 31, 2011 |  |  |  |  |  |  |  |  |
Real estate reserve (deducted from other long-term investments) | $ | 0.3 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 0.3 |
Allowance for doubtful accounts (deducted from accounts and premiums receivable) | $ | 7.2 |  |  | $ | 1.3 |  |  | $ | — |  |  | $ | 2.8 |  |  | $ | 5.7 |
Year Ended December 31, 2010 |  |  |  |  |  |  |  |  |
Real estate reserve (deducted from other long-term investments) | $ | 0.3 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 0.3 |
Allowance for doubtful accounts (deducted from accounts and premiums receivable) | $ | 9.9 |  |  | $ | 1.1 |  |  | $ | — |  |  | $ | 3.8 |  |  | $ | 7.2 |
Year Ended December 31, 2009 |  |  |  |  |  |  |  |  |
Real estate reserve (deducted from other long-term investments) | $ | 0.3 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 0.3 |
Allowance for doubtful accounts (deducted from accounts and premiums receivable) | $ | 14.9 |  |  | $ | 4.6 |  |  | $ | 1.0 |  |  | $ | 10.6 |  |  | $ | 9.9 |

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