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Investments (Fair Value And Gross Unrealized Losses In A Continuous Unrealized Loss Position) (Details)
$ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
security
Dec. 31, 2020
USD ($)
security
Schedule of Available-for-sale Securities [Line Items]    
Total number of fixed maturity AFS securities in an unrealized loss position | security 2,577 782
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value    
Less Than or Equal to Twelve Months $ 16,570 $ 4,552
Greater Than Twelve Months 1,781 1,045
Fair Value - Total 18,351 5,597
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI    
Less Than or Equal to Twelve Months 308 110
Greater Than Twelve Months 119 74
Gross Unrealized Losses - Total 427 184
Fixed Maturity AFS Securities [Member]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI    
Unrealized holding gains (losses) arising during the period (8) (1)
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value    
Less Than or Equal to Twelve Months 10,611 2,785
Greater Than Twelve Months 1,386 588
Fair Value - Total 11,997 3,373
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI    
Less Than or Equal to Twelve Months 230 85
Greater Than Twelve Months 96 51
Gross Unrealized Losses - Total 326 136
U.S. Government Bonds [Member] | Fixed Maturity AFS Securities [Member]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value    
Less Than or Equal to Twelve Months 6 28
Greater Than Twelve Months 26  
Fair Value - Total 32 28
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI    
Less Than or Equal to Twelve Months   1
Greater Than Twelve Months 2  
Gross Unrealized Losses - Total 2 1
State And Municipal Bonds [Member] | Fixed Maturity AFS Securities [Member]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value    
Less Than or Equal to Twelve Months 498  
Greater Than Twelve Months 19  
Fair Value - Total 517  
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI    
Less Than or Equal to Twelve Months 10  
Greater Than Twelve Months 1  
Gross Unrealized Losses - Total 11  
Foreign Government Bonds [Member] | Fixed Maturity AFS Securities [Member]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value    
Less Than or Equal to Twelve Months 61 57
Greater Than Twelve Months 56  
Fair Value - Total 117 57
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI    
Less Than or Equal to Twelve Months 3 1
Greater Than Twelve Months 2  
Gross Unrealized Losses - Total 5 1
RMBS [Member] | Fixed Maturity AFS Securities [Member]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value    
Less Than or Equal to Twelve Months 261 43
Greater Than Twelve Months 20 6
Fair Value - Total 281 49
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI    
Less Than or Equal to Twelve Months 3 1
Greater Than Twelve Months 1  
Gross Unrealized Losses - Total 4 1
CMBS [Member] | Fixed Maturity AFS Securities [Member]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value    
Less Than or Equal to Twelve Months 440  
Greater Than Twelve Months 33  
Fair Value - Total 473  
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI    
Less Than or Equal to Twelve Months 12  
Greater Than Twelve Months 2  
Gross Unrealized Losses - Total 14  
ABS [Member] | Fixed Maturity AFS Securities [Member]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value    
Less Than or Equal to Twelve Months 4,646 1,527
Greater Than Twelve Months 165 355
Fair Value - Total 4,811 1,882
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI    
Less Than or Equal to Twelve Months 49 9
Greater Than Twelve Months 5 6
Gross Unrealized Losses - Total 54 15
Hybrid And Redeemable Preferred Securities [Member] | Fixed Maturity AFS Securities [Member]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value    
Less Than or Equal to Twelve Months 47 112
Greater Than Twelve Months 76 96
Fair Value - Total 123 208
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI    
Less Than or Equal to Twelve Months 1 13
Greater Than Twelve Months 10 17
Gross Unrealized Losses - Total $ 11 $ 30