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Contingencies, Commitments and Guarantees (Contingencies, Commitments and Guarantees - Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]          
Settlement for reinsurance-related matter $ 57 $ 213 $ 123 $ 262  
Cumulative maximum indemnities and guarantees contractual limitation 98   98    
Liabilities for indemnities, guarantees and commitments 1   1   $ 1
Non-litigation loss          
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]          
Settlement for reinsurance-related matter   $ 140      
Minimum          
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]          
Indemnities and guarantees contractual limitation range 6   6    
Minimum | Non-litigation loss          
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]          
Loss contingency, range of possible loss, portion not accrued 0   0    
Maximum          
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]          
Loss contingency, range of possible loss, portion not accrued 10   10    
Indemnities and guarantees contractual limitation range 92   92    
Maximum | Non-litigation loss          
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]          
Loss contingency, range of possible loss, portion not accrued 125   125    
Mortgage Loan Commitments          
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]          
Fair value disclosure, off-balance sheet risks, face amount, liability 294   294   247
Commitments to Fund Partnership Investments and Private Corporate Bond Investments          
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]          
Fair value disclosure, off-balance sheet risks, face amount, liability $ 1,500   $ 1,500   $ 1,900