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Investments (Credit Quality Indicators For Residential Mortgage Loans) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]        
Mortgage loans on real estate, ACL $ 98 $ 95 $ 203 $ 2
Residential [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Amortized Cost 1,413 919    
Mortgage loans on real estate, ACL 15 17 $ 17 $ 2
Residential [Member] | Performing [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Amortized Cost 1,379 889    
Residential [Member] | Nonperforming [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Amortized Cost $ 34 $ 30