v3.23.1
Investments - Pledged investments (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Jan. 01, 2021
Dec. 31, 2020
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Amounts borrowed under repurchase and securities lending agreements $ 3,100 $ 3,700    
Securities pledged under repurchase agreements 2,968 259    
Securities pledged under securities lending agreements   3,323    
Total carrying values of cash and securities deposited under requirements of regulatory authorities or other insurance-related arrangements 3,500 3,900    
Loans 45,166 39,884    
Policyholder contract deposits 156,058 151,545 $ 148,421 $ 148,421
Less Than 12 Months 119,440 31,417    
Guaranteed Investment Contract        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Policyholder contract deposits 56 76    
Asset Pledged as Collateral | Federal Home Loan Bank Advances        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Available for sale debt securities 4,800 3,700    
Loans 1,800 1,400    
Asset Pledged as Collateral | Deposits        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Available for sale debt securities 63 41    
Asset Pledged as Collateral | Collateralized Reinsurance Transactions        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Available for sale debt securities 144 148    
Obligations of states, municipalities and political subdivisions        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Less Than 12 Months 5,076 201    
Non-U.S. governments        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Less Than 12 Months 3,932 1,198    
Corporate debt        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Less Than 12 Months 82,971 19,916    
U.S. government and government sponsored entities        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Less Than 12 Months 761 0    
Overnight and Continuous        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under repurchase agreements 0 176    
Securities pledged under securities lending agreements   0    
Up to 30 Days        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under repurchase agreements 2,391 61    
Securities pledged under securities lending agreements   534    
31 - 90 Days        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under repurchase agreements 577 22    
Securities pledged under securities lending agreements   2,789    
91 - 364 Days        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under repurchase agreements 0 0    
Securities pledged under securities lending agreements   0    
365 Days or Greater        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under repurchase agreements 0 0    
Securities pledged under securities lending agreements   0    
Fixed maturity securities        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Available for sale debt securities 2,968 3,582    
Securities collateral pledged to us 2,968 3,582    
Bonds available for sale | Obligations of states, municipalities and political subdivisions        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under securities lending agreements   106    
Bonds available for sale | Non-U.S. governments        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under repurchase agreements 21 48    
Securities pledged under securities lending agreements   43    
Bonds available for sale | Corporate debt        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under repurchase agreements 2,947 211    
Securities pledged under securities lending agreements   3,174    
Bonds available for sale | Overnight and Continuous | Obligations of states, municipalities and political subdivisions        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under securities lending agreements   0    
Bonds available for sale | Overnight and Continuous | Non-U.S. governments        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under repurchase agreements 0 48    
Securities pledged under securities lending agreements   0    
Bonds available for sale | Overnight and Continuous | Corporate debt        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under repurchase agreements 0 128    
Securities pledged under securities lending agreements   0    
Bonds available for sale | Up to 30 Days | Obligations of states, municipalities and political subdivisions        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under securities lending agreements   0    
Bonds available for sale | Up to 30 Days | Non-U.S. governments        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under repurchase agreements 21 0    
Securities pledged under securities lending agreements   0    
Bonds available for sale | Up to 30 Days | Corporate debt        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under repurchase agreements 2,370 61    
Securities pledged under securities lending agreements   534    
Bonds available for sale | 31 - 90 Days | Obligations of states, municipalities and political subdivisions        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under securities lending agreements   106    
Bonds available for sale | 31 - 90 Days | Non-U.S. governments        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under repurchase agreements 0 0    
Securities pledged under securities lending agreements   43    
Bonds available for sale | 31 - 90 Days | Corporate debt        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under repurchase agreements 577 22    
Securities pledged under securities lending agreements   2,640    
Bonds available for sale | 91 - 364 Days | Obligations of states, municipalities and political subdivisions        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under securities lending agreements   0    
Bonds available for sale | 91 - 364 Days | Non-U.S. governments        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under repurchase agreements 0 0    
Securities pledged under securities lending agreements   0    
Bonds available for sale | 91 - 364 Days | Corporate debt        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under repurchase agreements 0 0    
Securities pledged under securities lending agreements   0    
Bonds available for sale | 365 Days or Greater | Obligations of states, municipalities and political subdivisions        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under securities lending agreements   0    
Bonds available for sale | 365 Days or Greater | Non-U.S. governments        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under repurchase agreements 0 0    
Securities pledged under securities lending agreements   0    
Bonds available for sale | 365 Days or Greater | Corporate debt        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Securities pledged under repurchase agreements 0 0    
Securities pledged under securities lending agreements   0    
FHLBs        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Federal Home Loan Bank stock $ 222 $ 193