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COLLATERALIZED REINSURANCE AND TRUST AGREEMENTS
 9 Months Ended
Sep. 30, 2023
Collateralized Reinsurance And Trust Agreements [Abstract]  
COLLATERALIZED REINSURANCE AND TRUST AGREEMENTS COLLATERALIZED REINSURANCE AND TRUST AGREEMENTS
Certain 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 September 30, 2023, the total amount on deposit in trust accounts was $2.5 billion, which included $253 million of restricted cash. At September 30, 2022, the total amount on deposit in trust accounts was $2.2 billion, which included $431 million of restricted cash.
The Company reinsures some of its catastrophe exposures with the segregated accounts of subsidiary Mt. Logan Re, Ltd. (“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
September 30,		Nine Months Ended
September 30,
Mt. Logan Re Segregated Accounts2023202220232022
(Dollars in millions)
Ceded written premiums$89 $68 $187 $150 
Ceded earned premiums74 57 172 149 
Ceded losses and LAE26 99 79 161 
Assumed written premiums2 2 3 3 
Assumed earned premiums2 2 3 3 
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 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 Events6/22/20226/25/2025300 Aggregate
Total available limit as of September 30, 2023$1,800 
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. The Company has up to $350 million of catastrophe bond protection (“CAT Bond”) that attaches at a $48.1 billion Property Claims Services (“PCS”) Industry loss threshold. This recovery would be recognized on a pro-rata basis up to a $63.8 billion PCS Industry loss level. PCS’s current industry estimate of $48.4 billion issued in October 2023 exceeds the attachment point. As of September 30, 2023, the recovery under the CAT Bond, included in the Company’s financial results, is currently estimated to be $20 million, subject to further revision of the industry loss estimate.

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 dates, maturity dates and amounts correspond to the reinsurance agreements listed above.