Capital and Surplus (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Apr. 15, 2021
Statutory Accounting Practices [Line Items]
Description of Regulatory Capital Requirements under Insurance Regulations	All domestic insurance subsidiaries exceeded the minimum capital requirements
Minimum Capital Level, Percent	120.00%
Maximum Capital Contribution		$ 10
BERMUDA
Statutory Accounting Practices [Line Items]
Description of Regulatory Capital Requirements under Insurance Regulations	Due to the rapidly rising interest rates that caused the increase in unrealized losses reported in Other Comprehensive Income (Loss), CICA International fell below the required long-term business minimum solvency margin at September 30, 2022. As the Bermuda Insurance Act of 1978 permits, we have requested a modification under Section 6C to allow CICA International to use total statutory economic capital and surplus for purposes of calculating the minimum solvency margin in place of unconsolidated capital and surplus. The BMA is currently evaluating our request and has not taken any action with respect to this matter.
Statutory Accounting Practices, Risk Based Capital Requirements Compliance Assertion	CICA International’s capital level currently exceeds 120%