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Investments - Net Investment Income (Parenthetical) (Details) - Deposit asset underlying 10% coinsurance agreement [Member] - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Schedule of Net Investment Income, Reported Amounts, by Category [Line Items] |  |  |  |
Losses recognized for change in fair value of deposit asset underlying the 10% coinsurance agreement | $ (1.3) | $ (0.2) | $ (3.4) | $ (1.0)
Percentage of coinsurance costs | 10.00% | 10.00% | 10.00% | 10.00%

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- Definition Percentage of coinsurance covered costs. + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + 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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- Details
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