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Acquisition of Business Intangible Assets Acquired (Details) - USD ($) $ in Millions | 12 Months Ended |
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Dec. 31, 2015 | Apr. 30, 2015
Broker Relationships [Member] |  |
Schedule of Intangible Assets Acquired by Class [Line Items] |  |
Useful life of intangibles acquired | 15 years |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | $ 18.1 | $ 18.9
Intangible Assets Arising from Insurance Contracts Acquired in Business Combination [Member] |  |
Schedule of Intangible Assets Acquired by Class [Line Items] |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | 0.2 | 9.2
Other Intangible Assets [Member] |  |
Schedule of Intangible Assets Acquired by Class [Line Items] |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | 3.7 | 4.5
Finite-Lived Intangible Assets [Member] |  |
Schedule of Intangible Assets Acquired by Class [Line Items] |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | $ 22.0 | $ 32.6
Minimum [Member] |  |
Schedule of Intangible Assets Acquired by Class [Line Items] |  |
Useful life of intangibles acquired | 2 years |
Maximum [Member] |  |
Schedule of Intangible Assets Acquired by Class [Line Items] |  |
Useful life of intangibles acquired | 5 years |

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- Definition [Line Items] for Schedule of Intangible Assets Acquired by Class [Table] + References No definition available. + Details
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- Definition Amount of assets acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 + Details
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- Definition Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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