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Acquisition of Business - Recognized Identified Assets Acquired and Liabilities Assumed (Details) $ in Millions | Apr. 01, 2021 USD ($)
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Business Acquisition [Line Items] |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net | $ 371.0
Property and Casualty Insurance Reserves [Member] |
Business Acquisition [Line Items] |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | (211.1)
Unearned Premium [Member] |
Business Acquisition [Line Items] |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | (177.8)
Deferred Income Tax Liabilities [Member] |
Business Acquisition [Line Items] |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | (7.7)
Other Liabilities [Member] |
Business Acquisition [Line Items] |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | (51.0)
Fixed Maturities at Fair Value |
Business Acquisition [Line Items] |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities | 151.2
Equity Securities at Fair Value |
Business Acquisition [Line Items] |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities | 82.4
Short-term Investments [Member] |
Business Acquisition [Line Items] |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities | 100.1
Cash [Member] |
Business Acquisition [Line Items] |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | 54.3
Premiums Receivable [Member] |
Business Acquisition [Line Items] |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | 148.9
Receivables Other than Premium Receivable [Member] |
Business Acquisition [Line Items] |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | 2.0
Goodwill [Member] |
Business Acquisition [Line Items] |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | 197.9
Current Income Tax Asset [Member] |
Business Acquisition [Line Items] |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | 0.3
Other Assets [Member] |
Business Acquisition [Line Items] |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | $ 81.5

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- Definition Amount of assets acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123413009&loc=d3e4845-128472 + Details
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- Definition Amount of investments in debt and equity securities, including, but not limited to, held-to-maturity, trading and available-for-sale expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123413009&loc=d3e4845-128472 + Details
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- Definition Amount of liabilities assumed at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123413009&loc=d3e4845-128472 + Details
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