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Summary Of Accounting Policies And Accounting Changes (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Accounting Policy Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest rate assumption, minimum |  |  |  |  |  |  |  |  | 3.00% |  |
Interest rate assumption, maximum |  |  |  |  |  |  |  |  | 7.00% |  |
Write-off of long-lived asset | $ 0.0 | $ 0.0 | $ 11.1 | $ 0.0 | $ 0.0 | $ 54.6 | $ 0.0 | $ 0.0 | $ 11.1 | $ 54.6 | $ 0.0
Charge for goodwill impairment included in insurance expenses |  |  |  |  |  |  |  |  |  | 1.4 |
Amortization expense |  |  |  |  |  |  |  |  | 9.0 |  |
Life Insurance Product Line [Member] |  |  |  |  |  |  |  |  |  |  |
Accounting Policy Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |
Present value of the future profits embedded in life insurance in force | 32.5 |  |  |  | 36.5 |  |  |  | 32.5 | 36.5 |
Expected Amortization Expense of Ending Present Value of Future Insurance Profits, Net of Interest Accrued [Abstract] |  |  |  |  |  |  |  |  |  |  |
2016 |  |  |  |  |  |  |  |  | 3.4 |  |
2017 |  |  |  |  |  |  |  |  | 3.2 |  |
2018 |  |  |  |  |  |  |  |  | 2.8 |  |
2019 |  |  |  |  |  |  |  |  | 2.4 |  |
2020 |  |  |  |  |  |  |  |  | 2.0 |  |
Property and Casualty Insurance [Member] |  |  |  |  |  |  |  |  |  |  |
Accounting Policy Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |
Present value of the future profits embedded in life insurance in force | 11.2 |  |  |  | $ 13.3 |  |  |  | 11.2 | $ 13.3 |
Broker Relationships [Member] |  |  |  |  |  |  |  |  |  |  |
Accounting Policy Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |
Assets acquired | $ 18.1 |  |  |  |  |  |  |  | $ 18.1 |  |
Useful life of intangibles acquired |  |  |  |  |  |  |  |  | 15 years |  |

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- Definition Expected amortization expense in the fifth year after the balance sheet date of the present value of the future profits of long-duration contracts acquired in a purchase of an insurance enterprise. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section S99 -Paragraph 2 -Subparagraph (3) -URI http://asc.fasb.org/extlink&oid=27015749&loc=d3e569990-122904 + Details
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- Definition Expected amortization expense in the first year after the balance sheet date of the present value of the future profits of long-duration contracts acquired in a purchase of an insurance enterprise. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section S99 -Paragraph 2 -Subparagraph (3) -URI http://asc.fasb.org/extlink&oid=27015749&loc=d3e569990-122904 + Details
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- Definition Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16373-109275 + Details
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- Definition Maximum interest rate for traditional life contracts in the range of interest rates used to calculate future benefits to be paid to or on behalf of policyholders and related expenses less the present value of future net premiums using assumptions such as estimates of expected investment yields, mortality, morbidity, terminations and expenses, applicable at the time the insurance contracts are made and costs of settling insured claims and costs incurred in the claims settlement process of traditional life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6482852&loc=d3e14931-158439 Reference 2: 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(b)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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