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Investment Securities (Fair Value Measurement by Level) (Details) (USD $) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2012 Debt securities issued by industrial corporations | Dec. 31, 2011 Debt securities issued by industrial corporations | Dec. 31, 2012 Fair value | Dec. 31, 2011 Fair value | Dec. 31, 2010 Fair value | Dec. 31, 2012 Fair value Mortgage-backed and asset-backed securities | Dec. 31, 2011 Fair value Mortgage-backed and asset-backed securities | Dec. 31, 2012 Level 1 | Dec. 31, 2011 Level 1 | Dec. 31, 2010 Level 1 | Dec. 31, 2012 Level 2 | Dec. 31, 2011 Level 2 | Dec. 31, 2010 Level 2 | Dec. 31, 2012 Level 2 Mortgage-backed and asset-backed securities | Dec. 31, 2011 Level 2 Mortgage-backed and asset-backed securities | Dec. 31, 2012 Level 3 Mortgage-backed and asset-backed securities | Dec. 31, 2011 Level 3 Mortgage-backed and asset-backed securities | Dec. 31, 2012 Level 3 Fixed maturity investments | Dec. 31, 2011 Level 3 Fixed maturity investments | Dec. 31, 2010 Level 3 Fixed maturity investments | Dec. 31, 2012 Level 3 Common equity securities | Dec. 31, 2011 Level 3 Common equity securities | Dec. 31, 2010 Level 3 Common equity securities | Dec. 31, 2012 Level 3 Convertible fixed maturity investments | Dec. 31, 2011 Level 3 Convertible fixed maturity investments | Dec. 31, 2010 Level 3 Convertible fixed maturity investments | Dec. 31, 2012 Level 3 Other long-term investments | Dec. 31, 2011 Level 3 Other long-term investments | Dec. 31, 2010 Level 3 Other long-term investments | Dec. 31, 2012 Fair value measured on a recurring basis Debt securities issued by industrial corporations Basic materials | Dec. 31, 2012 Fair value measured on a recurring basis Discontinued Operations | Dec. 31, 2012 Fair value measured on a recurring basis Fair value | Dec. 31, 2011 Fair value measured on a recurring basis Fair value | Dec. 31, 2012 Fair value measured on a recurring basis Fair value US Government and agency obligations | Dec. 31, 2011 Fair value measured on a recurring basis Fair value US Government and agency obligations | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Debt securities issued by industrial corporations | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Debt securities issued by industrial corporations | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Debt securities issued by industrial corporations Consumer | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Debt securities issued by industrial corporations Consumer | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Debt securities issued by industrial corporations Industrial | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Debt securities issued by industrial corporations Industrial | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Debt securities issued by industrial corporations Financials | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Debt securities issued by industrial corporations Financials | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Debt securities issued by industrial corporations Communications | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Debt securities issued by industrial corporations Communications | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Debt securities issued by industrial corporations Basic materials | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Debt securities issued by industrial corporations Energy | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Debt securities issued by industrial corporations Energy | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Debt securities issued by industrial corporations Utilities | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Debt securities issued by industrial corporations Utilities | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Debt securities issued by industrial corporations Technology | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Debt securities issued by industrial corporations Technology | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Debt securities issued by industrial corporations Diversified | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Debt securities issued by industrial corporations Other | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Municipal obligations | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Municipal obligations | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Mortgage-backed and asset-backed securities | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Mortgage-backed and asset-backed securities | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Foreign government, agency and provincial obligations | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Foreign government, agency and provincial obligations | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Preferred stocks | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Preferred stocks | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Fixed maturity investments | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Fixed maturity investments | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Short-term investments | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Short-term investments | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Common equity securities | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Common equity securities | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Common equity securities Consumer | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Common equity securities Consumer | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Common equity securities Financials | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Common equity securities Financials | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Common equity securities Basic materials | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Common equity securities Basic materials | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Common equity securities Energy | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Common equity securities Energy | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Common equity securities Utilities | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Common equity securities Utilities | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Common equity securities Technology | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Common equity securities Technology | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Common equity securities Other | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Common equity securities Other | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Convertible fixed maturity investments | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Convertible fixed maturity investments | Dec. 31, 2012 Fair value measured on a recurring basis Fair value Other long-term investments | Dec. 31, 2011 Fair value measured on a recurring basis Fair value Other long-term investments | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 US Government and agency obligations | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 US Government and agency obligations | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Debt securities issued by industrial corporations | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Debt securities issued by industrial corporations | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Debt securities issued by industrial corporations Consumer | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Debt securities issued by industrial corporations Consumer | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Debt securities issued by industrial corporations Industrial | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Debt securities issued by industrial corporations Industrial | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Debt securities issued by industrial corporations Financials | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Debt securities issued by industrial corporations Financials | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Debt securities issued by industrial corporations Communications | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Debt securities issued by industrial corporations Communications | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Debt securities issued by industrial corporations Basic materials | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Debt securities issued by industrial corporations Basic materials | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Debt securities issued by industrial corporations Energy | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Debt securities issued by industrial corporations Energy | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Debt securities issued by industrial corporations Utilities | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Debt securities issued by industrial corporations Utilities | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Debt securities issued by industrial corporations Technology | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Debt securities issued by industrial corporations Technology | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Debt securities issued by industrial corporations Diversified | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Debt securities issued by industrial corporations Other | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Municipal obligations | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Municipal obligations | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Mortgage-backed and asset-backed securities | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Mortgage-backed and asset-backed securities | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Foreign government, agency and provincial obligations | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Foreign government, agency and provincial obligations | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Preferred stocks | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Preferred stocks | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Fixed maturity investments | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Fixed maturity investments | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Short-term investments | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Short-term investments | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Common equity securities | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Common equity securities | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Common equity securities Consumer | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Common equity securities Consumer | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Common equity securities Financials | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Common equity securities Financials | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Common equity securities Basic materials | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Common equity securities Basic materials | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Common equity securities Energy | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Common equity securities Energy | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Common equity securities Utilities | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Common equity securities Utilities | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Common equity securities Technology | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Common equity securities Technology | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Common equity securities Other | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Common equity securities Other | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Convertible fixed maturity investments | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Convertible fixed maturity investments | Dec. 31, 2012 Fair value measured on a recurring basis Level 1 Other long-term investments | Dec. 31, 2011 Fair value measured on a recurring basis Level 1 Other long-term investments | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 US Government and agency obligations | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 US Government and agency obligations | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Debt securities issued by industrial corporations | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Debt securities issued by industrial corporations | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Debt securities issued by industrial corporations Consumer | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Debt securities issued by industrial corporations Consumer | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Debt securities issued by industrial corporations Industrial | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Debt securities issued by industrial corporations Industrial | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Debt securities issued by industrial corporations Financials | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Debt securities issued by industrial corporations Financials | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Debt securities issued by industrial corporations Communications | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Debt securities issued by industrial corporations Communications | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Debt securities issued by industrial corporations Basic materials | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Debt securities issued by industrial corporations Basic materials | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Debt securities issued by industrial corporations Energy | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Debt securities issued by industrial corporations Energy | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Debt securities issued by industrial corporations Utilities | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Debt securities issued by industrial corporations Utilities | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Debt securities issued by industrial corporations Technology | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Debt securities issued by industrial corporations Technology | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Debt securities issued by industrial corporations Diversified | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Debt securities issued by industrial corporations Other | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Municipal obligations | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Municipal obligations | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Mortgage-backed and asset-backed securities | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Mortgage-backed and asset-backed securities | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Foreign government, agency and provincial obligations | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Foreign government, agency and provincial obligations | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Preferred stocks | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Preferred stocks | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Fixed maturity investments | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Fixed maturity investments | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Short-term investments | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Short-term investments | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Common equity securities | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Common equity securities | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Common equity securities Consumer | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Common equity securities Consumer | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Common equity securities Financials | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Common equity securities Financials | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Common equity securities Basic materials | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Common equity securities Basic materials | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Common equity securities Energy | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Common equity securities Energy | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Common equity securities Utilities | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Common equity securities Utilities | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Common equity securities Technology | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Common equity securities Technology | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Common equity securities Other | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Common equity securities Other | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Convertible fixed maturity investments | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Convertible fixed maturity investments | Dec. 31, 2012 Fair value measured on a recurring basis Level 2 Other long-term investments | Dec. 31, 2011 Fair value measured on a recurring basis Level 2 Other long-term investments | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 US Government and agency obligations | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 US Government and agency obligations | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Debt securities issued by industrial corporations | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Debt securities issued by industrial corporations | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Debt securities issued by industrial corporations Consumer | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Debt securities issued by industrial corporations Consumer | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Debt securities issued by industrial corporations Industrial | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Debt securities issued by industrial corporations Industrial | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Debt securities issued by industrial corporations Financials | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Debt securities issued by industrial corporations Financials | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Debt securities issued by industrial corporations Communications | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Debt securities issued by industrial corporations Communications | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Debt securities issued by industrial corporations Basic materials | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Debt securities issued by industrial corporations Basic materials | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Debt securities issued by industrial corporations Energy | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Debt securities issued by industrial corporations Energy | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Debt securities issued by industrial corporations Utilities | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Debt securities issued by industrial corporations Utilities | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Debt securities issued by industrial corporations Technology | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Debt securities issued by industrial corporations Technology | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Debt securities issued by industrial corporations Diversified | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Debt securities issued by industrial corporations Other | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Municipal obligations | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Municipal obligations | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Mortgage-backed and asset-backed securities | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Mortgage-backed and asset-backed securities | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Foreign government, agency and provincial obligations | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Foreign government, agency and provincial obligations | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Preferred stocks | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Preferred stocks | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Fixed maturity investments | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Fixed maturity investments | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Short-term investments | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Short-term investments | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Common equity securities | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Common equity securities | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Common equity securities Consumer | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Common equity securities Consumer | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Common equity securities Financials | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Common equity securities Financials | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Common equity securities Basic materials | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Common equity securities Basic materials | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Common equity securities Energy | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Common equity securities Energy | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Common equity securities Utilities | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Common equity securities Utilities | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Common equity securities Technology | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Common equity securities Technology | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Common equity securities Other | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Common equity securities Other | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Convertible fixed maturity investments | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Convertible fixed maturity investments | Dec. 31, 2012 Fair value measured on a recurring basis Level 3 Other long-term investments | Dec. 31, 2011 Fair value measured on a recurring basis Level 3 Other long-term investments | Dec. 31, 2010 Fair value measured on a recurring basis Level 3 Other long-term investments
Investment securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value investments |  |  |  |  | $ 2,385,100,000 | [1] | $ 2,135,100,000 | [1] | $ 7,581,300,000 | [2],[3] | $ 8,346,800,000 | [2],[3],[4],[5] | $ 7,901,600,000 | [4] | $ 2,095,600,000 | $ 3,222,900,000 | $ 1,985,700,000 | $ 1,879,100,000 | $ 1,894,400,000 | $ 5,206,100,000 | $ 6,088,200,000 | $ 5,477,400,000 | $ 2,073,500,000 | $ 3,207,800,000 | $ 22,100,000 | $ 15,100,000 | $ 92,900,000 | $ 78,900,000 | $ 128,400,000 | $ 37,300,000 | $ 32,300,000 | $ 71,200,000 | $ 0 | $ 0 | $ 0.0 | $ 259,300,000 | $ 268,300,000 | [4] | $ 330,200,000 | [4] | $ 189,100,000 |  | $ 7,581,300,000 | $ 8,346,800,000 | $ 440,100,000 | $ 305,000,000 | $ 2,385,100,000 | $ 2,135,100,000 | $ 727,100,000 | $ 790,700,000 | $ 330,800,000 | $ 359,400,000 | $ 401,400,000 | $ 239,600,000 | $ 276,100,000 | $ 225,800,000 | $ 195,700,000 | $ 181,500,000 | $ 155,800,000 | $ 204,200,000 | $ 140,100,000 | $ 54,000,000 | $ 24,500,000 | $ 3,500,000 | $ 20,900,000 | $ 5,200,000 | $ 2,700,000 | $ 2,095,600,000 | $ 3,222,900,000 | $ 521,900,000 | $ 589,200,000 | $ 86,400,000 | $ 78,800,000 | $ 5,534,300,000 | [6] | $ 6,333,700,000 | [7] | $ 630,600,000 | $ 846,000,000 | $ 1,029,700,000 | $ 755,000,000 | $ 255,600,000 | $ 188,800,000 | $ 324,500,000 | $ 219,200,000 | $ 103,300,000 | $ 121,000,000 | $ 101,000,000 | $ 72,600,000 | $ 43,600,000 | $ 42,000,000 | $ 90,200,000 | $ 25,800,000 | $ 111,500,000 | $ 85,600,000 | $ 127,400,000 | $ 143,800,000 | $ 259,300,000 | [8] | $ 268,300,000 | [9] | $ 1,985,700,000 | $ 1,879,100,000 | $ 369,100,000 | $ 296,200,000 | $ 1,000,000 | $ 3,800,000 | $ 0 | $ 0 | $ 0 | $ 0 | $ 1,000,000 | $ 3,800,000 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 52,100,000 | $ 65,700,000 | $ 0 | $ 0 | $ 422,200,000 | [6] | $ 365,700,000 | [7] | $ 630,600,000 | $ 846,000,000 | $ 932,900,000 | $ 667,400,000 | $ 255,600,000 | $ 188,500,000 | $ 286,300,000 | $ 185,800,000 | $ 103,300,000 | $ 119,900,000 | $ 101,000,000 | $ 72,600,000 | $ 43,400,000 | $ 41,800,000 | $ 90,200,000 | $ 25,800,000 | $ 53,100,000 | $ 33,000,000 | $ 0 | $ 0 | $ 0 | [8] | $ 0 | [9] | $ 5,206,100,000 | $ 6,088,200,000 | $ 71,000,000 | $ 8,800,000 | $ 2,384,100,000 | $ 2,131,300,000 | $ 727,100,000 | $ 790,700,000 | $ 330,800,000 | $ 359,400,000 | $ 400,400,000 | $ 235,800,000 | $ 276,100,000 | $ 225,800,000 | $ 189,100,000 | $ 195,700,000 | $ 181,500,000 | $ 155,800,000 | $ 204,200,000 | $ 140,100,000 | $ 54,000,000 | $ 24,500,000 | $ 3,500,000 | $ 20,900,000 | $ 5,200,000 | $ 2,700,000 | $ 2,073,500,000 | $ 3,207,800,000 | $ 469,800,000 | $ 523,500,000 | $ 15,600,000 | $ 15,000,000 | $ 5,019,200,000 | [6] | $ 5,889,100,000 | [7] | $ 0 | $ 0 | $ 59,500,000 | $ 55,300,000 | $ 0 | $ 300,000 | $ 900,000 | $ 1,500,000 | $ 0 | $ 1,100,000 | $ 0 | $ 0 | $ 200,000 | $ 200,000 | $ 0 | $ 0 | $ 58,400,000 | $ 52,200,000 | $ 127,400,000 | $ 143,800,000 | $ 0 | [8] | $ 0 | [9] | $ 389,500,000 | $ 379,500,000 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 22,100,000 | $ 15,100,000 | $ 0 | $ 0 | $ 70,800,000 | $ 63,800,000 | $ 92,900,000 | [6] | $ 78,900,000 | [7] | $ 0 | $ 0 | $ 37,300,000 | $ 32,300,000 | $ 0 | $ 0 | $ 37,300,000 | $ 31,900,000 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 400,000 | $ 0 | $ 0 | $ 259,300,000 | [8] | $ 268,300,000 | [9] |
Carrying value of investment accounted for using the equity method |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 35,000,000 |  | 33,000,000 |  | 41,900,000
Change in fair value of derivatives, included in other revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (100,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed maturity investments reclassified to assets held for sale (1) | $ (338,100,000) | [10] | $ (111,800,000) | [10] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Credit ratings are assigned based on the following hierarchy: 1) Standard & Poor’s Financial Services LLC (“Standard & Poor’s”) and 2) Moody’s Investor Service (“Moody’s”)
[2] | Excludes carrying value of $33.0 and $35.0 at January 1, 2012 and December 31, 2012 associated with other long-term investments accounted for using the equity method and $(0.1) at December 31, 2012 related to currency forward contracts.
[3] | Carrying value includes $111.8 and $338.1 at January 1, 2012 and December 31, 2012 that is classified as assets held for sale relating to discontinued operations.
[4] | Excludes carrying value of $33.0 and $41.9 at December 31, 2011 and January 1, 2011 associated with other long-term investment limited partnerships accounted for using the equity method.
[5] | Carrying value includes $111.8 that is classified as assets held for sale relating to AutoOne discontinued operations.
[6] | Carrying value includes $338.1 that is classified as assets held for sale relating to discontinued operations.
[7] | Carrying value includes $111.8 that is classified as assets held for sale relating to discontinued operations.
[8] | Excludes carrying value of $35.0 associated with other long-term investment limited partnerships accounted for using the equity method and $(0.1) related to currency forward contracts.
[9] | Excludes carrying value of $33.0 associated with other long-term investments accounted for using the equity method.
[10] | Assets held for sale related to discontinued operations. See Note 20.

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