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Stockholders' Equity and Restrictions - Capital and Surplus (Details) - USD ($)
$ in Millions
9 Months Ended
Aug. 31, 2023
Sep. 30, 2023
Statutory Accounting Practices [Line Items]    
Description of Regulatory Capital Requirements under Insurance Regulations   All domestic insurance subsidiaries exceeded the minimum capital requirements
Keep Well Agreement, Date of Contract Aug. 31, 2023  
Maximum Capital Contribution $ 10  
Minimum Capital Level, Premiums to Capital and Surplus, Percent   112.00%
Minimum Capital Level, Percent   200.00%
Contract Term, Keep Well Agreement 12 months  
PUERTO RICO    
Statutory Accounting Practices [Line Items]    
Description of Regulatory Capital Requirements under Insurance Regulations   CICA PR is required to maintain a minimum of $750,000 in capital and maintain a premium to surplus ratio of 7 to 1