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Property and Casualty Insurance Reserves (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Beginning Property and Casualty Insurance Reserves: [Abstract] |  |  |
Property and Casualty Insurance Reserves, Gross of Reinsurance at Beginning of Year | $ 970.6 | $ 1,029.1 | $ 1,118.7
Less Reinsurance Recoverables and Indemnification at Beginning of Year | 66.2 | 74.5 | 78.1
Property and Casualty Insurance Reserves, Net of Reinsurance and Indemnification at Beginning of Year | 904.4 | 954.6 | 1,040.6
Incurred Losses and LAE related to: |  |  |
Prior Years - Incurred Losses and LAE | (64.6) | (31.5) | (33.1)
Total Incurred Losses and LAE | 991.9 | 1,221.6 | 1,305.4
Paid Losses and LAE related to: |  |  |
Prior Years - Paid Losses and LAE | 434.0 | 470.4 | 503.7
Total Paid Losses and LAE | 1,116.2 | 1,271.8 | 1,391.4
Property and Casualty Insurance Reserves, Net of Reinsurance and Indemnification at End of Year | 780.1 | 904.4 | 954.6
Plus Reinsurance and Indemnifcation Recoverables at End of Year | 63.4 | 66.2 | 74.5
Property and Casualty Insurance Reserves, Gross of Reinsurance at End of Year | 843.5 | 970.6 | 1,029.1
Personal Lines [Member] |  |  |
Incurred Losses and LAE related to: |  |  |
Prior Years - Incurred Losses and LAE | (56.8) | (12.6) | (29.3)
Commercial Lines [Member] |  |  |
Incurred Losses and LAE related to: |  |  |
Prior Years - Incurred Losses and LAE | (7.8) | (18.9) | (3.8)
Segment, Continuing Operations [Member] |  |  |
Incurred Losses and LAE related to: |  |  |
Current Year - Incurred Losses and LAE | 1,056.5 | 1,253.1 | 1,338.5
Prior Years - Incurred Losses and LAE | (59.8) | (25.2) | (35.0)
Paid Losses and LAE related to: |  |  |
Current Year - Paid Losses and LAE | 682.2 | 801.4 | 887.7
Prior Years - Paid Losses and LAE | 421.7 | 451.2 | 472.9
Segment, Continuing Operations [Member] | Commercial Lines [Member] |  |  |
Incurred Losses and LAE related to: |  |  |
Prior Years - Incurred Losses and LAE | (3.0) | (12.6) |
Segment, Discontinued Operations [Member] |  |  |
Incurred Losses and LAE related to: |  |  |
Prior Years - Incurred Losses and LAE | (4.8) | (6.3) | 1.9
Paid Losses and LAE related to: |  |  |
Prior Years - Paid Losses and LAE | 12.3 | 19.2 | 30.8
Segment, Discontinued Operations [Member] | Commercial Lines [Member] |  |  |
Incurred Losses and LAE related to: |  |  |
Prior Years - Incurred Losses and LAE | (4.8) | (6.3) |
Personal Automobile [Member] | Personal Lines [Member] |  |  |
Incurred Losses and LAE related to: |  |  |
Prior Years - Incurred Losses and LAE | (30.1) | 2.2 |
Homeowners [Member] | Personal Lines [Member] |  |  |
Incurred Losses and LAE related to: |  |  |
Prior Years - Incurred Losses and LAE | (20.1) | (11.7) |
Other Personal Lines [Member] | Personal Lines [Member] |  |  |
Incurred Losses and LAE related to: |  |  |
Prior Years - Incurred Losses and LAE | $ (6.6) | $ (3.1) |

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- Definition The amount needed to reflect the estimated ultimate cost of settling claims relating to casualty insurance insured events that have occurred on or before a particular date (ordinarily, the balance sheet date) and the amount needed to provide for the estimated ultimate cost required to investigate and settle claims relating to insured events that have occurred on or before a particular date (ordinarily, the balance sheet date), whether or not reported to the insurer at that date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 18 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a),(b),(c) -URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437 + Details
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- Definition Total amount of payments made during the reporting period to settle insured claims and pay costs incurred in the claims settlement process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Financial Reporting Release (FRR) -Number 403 -Paragraph 04 -Subparagraph b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437 + Details
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- Definition Amount of payments made in the reporting period to settle claims incurred in the current period and related claims settlement costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Financial Reporting Release (FRR) -Number 403 -Paragraph 04 -Subparagraph b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437 + Details
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- Definition Amount of payments made in the reporting period to settle claims incurred in prior periods and related claims settlement costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Financial Reporting Release (FRR) -Number 403 -Paragraph 04 -Subparagraph b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437 + Details
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- Definition Amount of provision in the period for claims incurred in the reporting period and related claims settlement costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Financial Reporting Release (FRR) -Number 403 -Paragraph 04 -Subparagraph b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437 + Details
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- Definition Amount of provision in the period for claims incurred in prior reporting periods and related claims settlement costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Financial Reporting Release (FRR) -Number 403 -Paragraph 04 -Subparagraph b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437 + Details
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- Definition Liability as of the balance sheet date for amounts representing estimated cost of settling unpaid claims under the terms of the underlying insurance policies, less estimated reinsurance recoveries on such claims. This includes an estimate for claims which have been incurred but not reported. Claim adjustment expenses represent the costs estimated to be incurred in the settlement of unpaid claims. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Financial Reporting Release (FRR) -Number 403 -Paragraph 04 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Subparagraph a -Article 7 + Details
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- Definition Amount after valuation allowance recoverable including premium paid under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 6 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6480758&loc=d3e6824-158387 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.(a),6) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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