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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

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