XML 156 R126.htm IDEA: XBRL DOCUMENT v3.22.0.1
Investments (Evaluation of Fixed Maturity Securities AFS in an Unrealized Loss Position - Narrative) (Details)
$ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Debt Securities, Available-for-sale [Line Items]      
Change in Gross Unrealized Temporary Loss $ 8,171 $ (5,198) $ (14,591)
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss 2,400    
Equal to or Greater than 12 Months ,Gross Unrealized Loss $ 1,200    
Percentage of Gross Unrealized Loss for 12 months or greater 48.00%    
Total number of securities in an unrealized loss position equal or greater than 12 months 979 690  
Investment Grade      
Debt Securities, Available-for-sale [Line Items]      
Equal to or Greater than 12 Months ,Gross Unrealized Loss $ 1,025 $ 350  
Percentage of Gross Unrealized Loss for 12 months or greater 89.00%    
Total number of securities in an unrealized loss position equal or greater than 12 months 817    
Below Investment Grade      
Debt Securities, Available-for-sale [Line Items]      
Equal to or Greater than 12 Months ,Gross Unrealized Loss $ 129 $ 51  
Percentage of Gross Unrealized Loss for 12 months or greater 11.00%    
Total number of securities in an unrealized loss position equal or greater than 12 months 162    
Fixed maturity securities without an allowance for credit loss      
Debt Securities, Available-for-sale [Line Items]      
Change in Gross Unrealized Temporary Loss $ 986