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Property and Casualty Insurance Reserves (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] |  |
Property and Casulty Insurance Reserve - Gross of Reinsurance at Beginning of Year | $ 931.4 | $ 862.8
Property and Casualty Insurance Reserves - Net of Reinsurance and Indemnification at Beginning of Year | 881.2 | 810.8
Incurred Losses and LAE Related to Prior Years | 10.9 | 2.6
Total Incurred Losses and LAE | 383.9 | 344.3
Paid Losses and LAE Related to Prior Years | 212.4 | 183.9
Total Paid Losses and LAE | 333.0 | 304.0
Property and Casualty Insurance Reserves - Net of Reinsurance and Indemnification at End of Period | 932.1 | 851.1
Property and Casualty Insurance Reserves - Gross of Reinsurance and Indemnification at End of Period | 984.4 | 900.4
Continuing Operations [Member] |  |
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] |  |
Incurred Losses and LAE Related to Current Year | 373.0 | 341.7
Incurred Losses and LAE Related to Prior Years | 11.1 | 2.7
Paid Losses and LAE Related to Current Year | 120.6 | 120.1
Paid Losses and LAE Related to Prior Years | 211.6 | 180.8
Discontinued Operations [Member] |  |
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] |  |
Incurred Losses and LAE Related to Prior Years | (0.2) | (0.1)
Paid Losses and LAE Related to Prior Years | 0.8 | 3.1
Personal Automobile [Member] |  |
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] |  |
Incurred Losses and LAE Related to Prior Years | 9.9 | 9.6
Homeowners [Member] |  |
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] |  |
Incurred Losses and LAE Related to Prior Years | 0.1 | (5.1)
Other Personal Lines [Member] |  |
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] |  |
Incurred Losses and LAE Related to Prior Years | (0.7) | 0.6
Property and Casualty, Personal Insurance Product Line [Member] |  |
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] |  |
Incurred Losses and LAE Related to Prior Years | 9.3 | 5.1
Property and Casualty, Commercial Insurance Product Line [Member] |  |
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] |  |
Incurred Losses and LAE Related to Prior Years | 1.6 | (2.5)
Property and Casualty, Commercial Insurance Product Line [Member] | Continuing Operations [Member] |  |
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] |  |
Incurred Losses and LAE Related to Prior Years | 1.8 | (2.4)
Property and Casualty, Commercial Insurance Product Line [Member] | Discontinued Operations [Member] |  |
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] |  |
Incurred Losses and LAE Related to Prior Years | (0.2) | (0.1)
Catastrophe [Member] | Homeowners [Member] |  |
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] |  |
Incurred Losses and LAE Related to Prior Years | (0.6) |
Property and Casualty Insurance [Member] |  |
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] |  |
Less Reinsurance and Indemnification Recoverables at Beginning of Year | 50.2 | 52.0
Plus Reinsurance and Indemnification Recoverables at End of Period | $ 52.3 | $ 49.3

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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 FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65670824&loc=d3e14764-158437 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (cc) -URI http://asc.fasb.org/extlink&oid=65670824&loc=d3e14764-158437 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-18(Column C)) -URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e575016-122915 + Details
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- Definition Amount, after effects of reinsurance, of payments to settle claims incurred in the current period and related claims settlement costs. + 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 (c) -URI http://asc.fasb.org/extlink&oid=65670824&loc=d3e14764-158437 + Details
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- Definition Amount, after effects of reinsurance, of payments to settle claims incurred in prior periods and related claims settlement costs. + 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 (c) -URI http://asc.fasb.org/extlink&oid=65670824&loc=d3e14764-158437 + Details
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- Definition Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred and costs incurred in the claim settlement process. + 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 (b) -URI http://asc.fasb.org/extlink&oid=65670824&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 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(13)(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (cc) -URI http://asc.fasb.org/extlink&oid=65670824&loc=d3e14764-158437 Reference 3: 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=65670824&loc=d3e14764-158437 + Details
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- Definition Amount, after effects of reinsurance, of payments to settle insured claims and pay costs incurred in the claims settlement process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585 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=65670824&loc=d3e14764-158437 + Details
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