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COLLATERALIZED REINSURANCE AND TRUST AGREEMENTS
 3 Months Ended
Mar. 31, 2023
Collateralized Reinsurance And Trust Agreements [Abstract]  
COLLATERALIZED REINSURANCE AND TRUST AGREEMENTS COLLATERALIZED REINSURANCE AND TRUST AGREEMENTSCertain subsidiaries of Group have established trust agreements, which effectively use the Company’s investments as collateral, as security for assumed losses payable to certain non-affiliated ceding companies. At March 31, 2023, the total
amount on deposit in trust accounts was $2.5 billion, which includes $202 million of restricted cash. At March 31, 2022, the total amount on deposit in trust accounts was $1.8 billion, which includes $365 million of restricted cash.
The Company reinsures some of its catastrophe exposures with the segregated accounts of Mt. Logan Re. Mt. Logan Re is a Collateralized insurer registered in Bermuda and 100% of the voting common shares are owned by Group. Each segregated account invests predominantly in a diversified set of catastrophe exposures, diversified by risk/peril and across different geographic regions globally.
The following table summarizes the premiums and losses that are ceded by the Company to Mt. Logan Re segregated accounts and assumed by the Company from Mt. Logan Re segregated accounts.
Three Months Ended
March 31,
Mt. Logan Re Segregated Accounts20232022
(Dollars in millions)
Ceded written premiums$53 $50 
Ceded earned premiums46 50 
Ceded losses and LAE36 41 
Assumed written premiums1 1 
Assumed earned premiums1 1 
Assumed losses and LAE— — 
The Company entered into various collateralized reinsurance agreements with Kilimanjaro Re Limited (“Kilimanjaro”), a Bermuda based special purpose reinsurer, to provide the Company with catastrophe reinsurance coverage. These agreements are multi-year reinsurance contracts which cover named storm and earthquake events. The table below summarizes the various agreements.
(Dollars in millions)
ClassDescriptionEffective DateExpiration DateLimitCoverage Basis
Series 2018-1 Class A-2US, Canada, Puerto Rico – Named Storm and Earthquake Events4/30/20185/5/2023$63 Aggregate
Series 2018-1 Class B-2US, Canada, Puerto Rico – Named Storm and Earthquake Events4/30/20185/5/2023200 Aggregate
Series 2019-1 Class A-1US, Canada, Puerto Rico – Named Storm and Earthquake Events12/12/201912/19/2023150 Occurrence
Series 2019-1 Class B-1US, Canada, Puerto Rico – Named Storm and Earthquake Events12/12/201912/19/2023275 Aggregate
Series 2019-1 Class A-2US, Canada, Puerto Rico – Named Storm and Earthquake Events12/12/201912/19/2024150 Occurrence
Series 2019-1 Class B-2US, Canada, Puerto Rico – Named Storm and Earthquake Events12/12/201912/19/2024275 Aggregate
Series 2021-1 Class A-1US, Canada, Puerto Rico – Named Storm and Earthquake Events4/8/20214/21/2025150 Occurrence
Series 2021-1 Class B-1US, Canada, Puerto Rico – Named Storm and Earthquake Events4/8/20214/21/202585 Aggregate
Series 2021-1 Class C-1US, Canada, Puerto Rico – Named Storm and Earthquake Events4/8/20214/21/202585 Aggregate
Series 2021-1 Class A-2US, Canada, Puerto Rico – Named Storm and Earthquake Events4/8/20214/20/2026150 Occurrence
Series 2021-1 Class B-2US, Canada, Puerto Rico – Named Storm and Earthquake Events4/8/20214/20/202690 Aggregate
Series 2021-1 Class C-2US, Canada, Puerto Rico – Named Storm and Earthquake Events4/8/20214/20/202690 Aggregate
Series 2022-1 Class AUS, Canada, Puerto Rico – Named Storm and Earthquake Events6/22/20226/22/2025300 Aggregate
Total available limit as of March 31, 2023$2,063 
Recoveries under these collateralized reinsurance agreements with Kilimanjaro are primarily dependent on estimated industry level insured losses from covered events, as well as the geographic location of the events. The estimated
industry level of insured losses is obtained from published estimates by an independent recognized authority on insured property losses. As of March 31, 2023, none of the published insured loss estimates for catastrophe events during the applicable covered periods of the various agreements have exceeded the single event retentions or aggregate retentions under the terms of the agreements that would result in a recovery.

Kilimanjaro has financed the various property catastrophe reinsurance coverages by issuing catastrophe bonds to unrelated, external investors. The proceeds from the issuance of the catastrophe bonds are held in reinsurance trusts throughout the duration of the applicable reinsurance agreements and invested solely in U.S. government money market funds with a rating of at least “AAAm” by Standard & Poor’s. The catastrophe bonds’ issue date, maturity date and amount correspond to the reinsurance agreements listed above.