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Collateralized Reinsurance And Trust Agreements (Schedule of Proceeds from Issuance of Notes Held in Reinsurance Trusts) (Details) - Kilimanjaro Re Limited [Member] $ in Millions | 9 Months Ended
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Sep. 30, 2022 USD ($)
Effects of Reinsurance [Line Items] |
Amount | $ 2,063
Series 2018-1 Class A-2 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 30, 2018
Maturity Date | May 05, 2023
Amount | $ 63
Series 2018-1 Class B-2 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 30, 2018
Maturity Date | May 05, 2023
Amount | $ 200
Series 2019-1 Class A-1 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Dec. 12, 2019
Maturity Date | Dec. 19, 2023
Amount | $ 150
Series 2019-1 Class B-1 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Dec. 12, 2019
Maturity Date | Dec. 19, 2023
Amount | $ 275
Series 2019-1 Class A-2 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Dec. 12, 2019
Maturity Date | Dec. 19, 2024
Amount | $ 150
Series 2019-1 Class B-2 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Dec. 12, 2019
Maturity Date | Dec. 19, 2024
Amount | $ 275
Series 2021-1 Class A-1 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 08, 2021
Maturity Date | Apr. 21, 2025
Amount | $ 150
Series 2021-1 Class B-1 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 08, 2021
Maturity Date | Apr. 21, 2025
Amount | $ 85
Series 2021-1 Class C-1 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 08, 2021
Maturity Date | Apr. 21, 2025
Amount | $ 85
Series 2021-1 Class A-2 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 08, 2021
Maturity Date | Apr. 20, 2026
Amount | $ 150
Series 2021-1 Class B-2 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 08, 2021
Maturity Date | Apr. 20, 2026
Amount | $ 90
Series 2021-1 Class C-2 [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Apr. 08, 2021
Maturity Date | Apr. 20, 2026
Amount | $ 90
Series 2022-1 Class A [Member] |
Effects of Reinsurance [Line Items] |
Issue Date | Jun. 22, 2022
Maturity Date | Jun. 22, 2025
Amount | $ 300

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