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Investments - Allowance for Credit Loss (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2020 USD ($)
Allowance for Credit Loss |
Additions for credit losses on securities for which an allowance was not previously recorded | $ 7.6
Ending balance | 7.6
Corporate debt securities |
Allowance for Credit Loss |
Additions for credit losses on securities for which an allowance was not previously recorded | 7.0
Ending balance | 7.0
Commercial mortgage-backed securities |
Allowance for Credit Loss |
Additions for credit losses on securities for which an allowance was not previously recorded | 0.4
Ending balance | 0.4
Collateralized debt obligations |
Allowance for Credit Loss |
Additions for credit losses on securities for which an allowance was not previously recorded | 0.1
Ending balance | 0.1
Other debt obligations |
Allowance for Credit Loss |
Additions for credit losses on securities for which an allowance was not previously recorded | 0.1
Ending balance | $ 0.1

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- Definition Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118955579&loc=SL82922900-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=118955579&loc=SL82922900-210455 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aaa) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454 + Details
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- Definition Amount of expense for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), for which no credit loss was previously recorded. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118955579&loc=SL82922900-210455 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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