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Investments (Fair Value And Gross Unrealized Losses In A Continuous Unrealized Loss Position) (Details) - Fixed Maturity AFS Securities [Member]
$ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
security
Mar. 31, 2022
USD ($)
security
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI    
Less Than or Equal to Twelve Months $ 313 $ 2,342
Greater Than Twelve Months 138 656
Continuous Unrealized Loss Position, Total 451 2,998
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 16,786 40,869
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 1,973 4,390
Debt Securities, Available-for-sale, Unrealized Loss Position $ 18,759 $ 45,259
Total number of fixed maturity AFS securities in an unrealized loss position | security 2,597 5,093
Unrealized holding gains (losses) arising during the period $ 8  
Corporate Bonds [Member]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI    
Less Than or Equal to Twelve Months 234 $ 1,936
Greater Than Twelve Months 115 561
Continuous Unrealized Loss Position, Total 349 2,497
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 10,796 30,470
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 1,567 3,411
Debt Securities, Available-for-sale, Unrealized Loss Position 12,363 33,881
U.S. Government Bonds [Member]    
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 4
Continuous Unrealized Loss Position, Total 2 5
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 6 36
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 26 24
Debt Securities, Available-for-sale, Unrealized Loss Position 32 60
State And Municipal Bonds [Member]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI    
Less Than or Equal to Twelve Months 11 141
Greater Than Twelve Months 1 13
Continuous Unrealized Loss Position, Total 12 154
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 522 1,296
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 24 73
Debt Securities, Available-for-sale, Unrealized Loss Position 546 1,369
Foreign Government Bonds [Member]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI    
Less Than or Equal to Twelve Months 3 7
Greater Than Twelve Months 2 11
Continuous Unrealized Loss Position, Total 5 18
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 61 74
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 56 82
Debt Securities, Available-for-sale, Unrealized Loss Position 117 156
RMBS [Member]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI    
Less Than or Equal to Twelve Months 3 39
Greater Than Twelve Months 1 3
Continuous Unrealized Loss Position, Total 4 42
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 262 960
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 22 32
Debt Securities, Available-for-sale, Unrealized Loss Position 284 992
CMBS [Member]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI    
Less Than or Equal to Twelve Months 12 44
Greater Than Twelve Months 2 28
Continuous Unrealized Loss Position, Total 14 72
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 446 1,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 37 223
Debt Securities, Available-for-sale, Unrealized Loss Position 483 1,223
ABS [Member]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI    
Less Than or Equal to Twelve Months 49 169
Greater Than Twelve Months 5 20
Continuous Unrealized Loss Position, Total 54 189
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 4,646 6,938
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 165 475
Debt Securities, Available-for-sale, Unrealized Loss Position 4,811 7,413
Hybrid And Redeemable Preferred Securities [Member]    
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI    
Less Than or Equal to Twelve Months 1 5
Greater Than Twelve Months 10 16
Continuous Unrealized Loss Position, Total 11 21
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value    
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 47 95
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 76 70
Debt Securities, Available-for-sale, Unrealized Loss Position $ 123 $ 165