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Investments - Fixed Maturity Securities in Continuous Loss Position (Details) | Dec. 31, 2022 security | Dec. 31, 2022 position | Dec. 31, 2021 security | Dec. 31, 2021 position
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Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of position with a gross unrealized loss, more than 12 months | 587 | 587 | 122 | 122
AAA |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of position with a gross unrealized loss, more than 12 months |  | 67 |  | 24
AA |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of position with a gross unrealized loss, more than 12 months |  | 217 |  | 38
A |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of position with a gross unrealized loss, more than 12 months |  | 94 |  | 3
BBB |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of position with a gross unrealized loss, more than 12 months |  | 93 |  | 14
BB |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of position with a gross unrealized loss, more than 12 months |  | 68 |  | 13
B |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of position with a gross unrealized loss, more than 12 months |  | 31 |  | 8
CCC or lower |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of position with a gross unrealized loss, more than 12 months |  | 2 |  | 0
Not rated |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of position with a gross unrealized loss, more than 12 months |  | 15 |  | 22

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- Definition Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without an allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455 + 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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