v3.24.1.u1
Reinsurance - Effective Exit of Variable Annuity Reinsurance Business (Details) - Variable Annuity - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Ceded Credit Risk [Line Items]      
Market risk benefits reinsurance recoverable, including IBNR and outstanding claims, less premiums due $ 974   $ 1,100
Incurred but not yet paid and outstanding claims 23   19
Impact of non-performance risk  
Berkshire      
Ceded Credit Risk [Line Items]      
Percent of future claim payments reinsured 100.00%    
Remaining overall limit under reinsurance agreement $ 3,100    
Market risk benefits reinsurance recoverable, including IBNR and outstanding claims, less premiums due $ 777   873
Berkshire | Secured | Market risk benefits reinsurance recoverable, including IBNR and outstanding claims, less premiums due | Collateralization risk      
Ceded Credit Risk [Line Items]      
Concentration percentage 100.00%    
Sun Life Assurance Company of Canada      
Ceded Credit Risk [Line Items]      
Market risk benefits reinsurance recoverable, including IBNR and outstanding claims, less premiums due $ 79   92
Liberty Re (Bermuda) Ltd.      
Ceded Credit Risk [Line Items]      
Market risk benefits reinsurance recoverable, including IBNR and outstanding claims, less premiums due $ 91   104
Liberty Re (Bermuda) Ltd. | Secured | Market risk benefits reinsurance recoverable, including IBNR and outstanding claims, less premiums due | Collateralization risk      
Ceded Credit Risk [Line Items]      
Concentration percentage 100.00%    
SCOR SE      
Ceded Credit Risk [Line Items]      
Market risk benefits reinsurance recoverable, including IBNR and outstanding claims, less premiums due $ 27   $ 31
SCOR SE | Secured | Market risk benefits reinsurance recoverable, including IBNR and outstanding claims, less premiums due | Collateralization risk      
Ceded Credit Risk [Line Items]      
Concentration percentage 75.00%