Debt - Interest Payable (Details) - Surplus Notes	Sep. 30, 2023
A+
Financing Receivable, Credit Quality Indicator [Line Items]
Applicable Interest Rate	5.875%
A
Financing Receivable, Credit Quality Indicator [Line Items]
Applicable Interest Rate	6.375%
A-
Financing Receivable, Credit Quality Indicator [Line Items]
Applicable Interest Rate	6.875%
B++ (or lower)
Financing Receivable, Credit Quality Indicator [Line Items]
Applicable Interest Rate	7.375%

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.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-5

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479294/326-20-55-79

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