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Contingencies, Commitments and Guarantees (Contingencies, Commitments and Guarantees - Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Settlement for reinsurance-related matter $ 88 $ 66  
Cumulative maximum indemnities and guarantees contractual limitation 98    
Liabilities for indemnities, guarantees and commitments 1   $ 1
Premium Receivable, Allowance for Credit Loss, Period Increase (Decrease) 187    
Loss Contingency, Estimate of Possible Loss 0    
Universal Life Insurance      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Premium Receivable, Allowance for Credit Loss, Period Increase (Decrease) 167    
Other Expense      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Premium Receivable, Allowance for Credit Loss, Period Increase (Decrease) 20    
Minimum      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Indemnities and guarantees contractual limitation range 6    
Maximum      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Loss contingency, range of possible loss, portion not accrued 10    
Indemnities and guarantees contractual limitation range 92    
Mortgage Loan Commitments      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Fair value disclosure, off-balance sheet risks, face amount, liability 387   374
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 $ 1,400   $ 1,400