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Investments (Fair Value And Gross Unrealized Losses In A Continuous Unrealized Loss Position) (Details) - Fixed Maturity AFS Securities [Member] | 12 Months Ended
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Dec. 31, 2021 USD ($) security | Dec. 31, 2020 USD ($) security
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months | $ 16,786,000,000 | $ 4,808,000,000
Greater Than Twelve Months | 1,973,000,000 | 1,068,000,000
Continuous Unrealized Loss Position, Total | 18,759,000,000 | 5,876,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 313,000,000 | 117,000,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 138,000,000 | 81,000,000
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 451,000,000 | $ 198,000,000
Total number of fixed maturity AFS securities in an unrealized loss position | security | 2,597 | 802
Unrealized holding gains (losses) arising during the period | $ 8,000,000 | $ 1,000,000
Corporate Bonds [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months | 10,796,000,000 | 3,039,000,000
Greater Than Twelve Months | 1,567,000,000 | 607,000,000
Continuous Unrealized Loss Position, Total | 12,363,000,000 | 3,646,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 234,000,000 | 92,000,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 115,000,000 | 58,000,000
Debt Securities, Available-for-sale, Unrealized Loss Position | 349,000,000 | 150,000,000
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 | 6,000,000 | 28,000,000
Greater Than Twelve Months | 26,000,000 |
Continuous Unrealized Loss Position, Total | 32,000,000 | 28,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months |  | 1,000,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 2,000,000 |
Debt Securities, Available-for-sale, Unrealized Loss Position | 2,000,000 | 1,000,000
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 | 522,000,000 |
Greater Than Twelve Months | 24,000,000 |
Continuous Unrealized Loss Position, Total | 546,000,000 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 11,000,000 |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 1,000,000 |
Debt Securities, Available-for-sale, Unrealized Loss Position | 12,000,000 |
Foreign Government Bonds [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months | 61,000,000 | 57,000,000
Greater Than Twelve Months | 56,000,000 |
Continuous Unrealized Loss Position, Total | 117,000,000 | 57,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 3,000,000 | 1,000,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 2,000,000 |
Debt Securities, Available-for-sale, Unrealized Loss Position | 5,000,000 | 1,000,000
RMBS [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months | 262,000,000 | 45,000,000
Greater Than Twelve Months | 22,000,000 | 7,000,000
Continuous Unrealized Loss Position, Total | 284,000,000 | 52,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 3,000,000 | 1,000,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 1,000,000 |
Debt Securities, Available-for-sale, Unrealized Loss Position | 4,000,000 | 1,000,000
CMBS [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months | 446,000,000 |
Greater Than Twelve Months | 37,000,000 |
Continuous Unrealized Loss Position, Total | 483,000,000 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 12,000,000 |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 2,000,000 |
Debt Securities, Available-for-sale, Unrealized Loss Position | 14,000,000 |
ABS [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months | 4,646,000,000 | 1,527,000,000
Greater Than Twelve Months | 165,000,000 | 358,000,000
Continuous Unrealized Loss Position, Total | 4,811,000,000 | 1,885,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 49,000,000 | 9,000,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 5,000,000 | 6,000,000
Debt Securities, Available-for-sale, Unrealized Loss Position | 54,000,000 | 15,000,000
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 |  | 112,000,000
Greater Than Twelve Months |  | 96,000,000
Continuous Unrealized Loss Position, Total |  | 208,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months |  | 13,000,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer |  | 17,000,000
Debt Securities, Available-for-sale, Unrealized Loss Position |  | $ 30,000,000
Preferred Stock [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months | 47,000,000 |
Greater Than Twelve Months | 76,000,000 |
Continuous Unrealized Loss Position, Total | 123,000,000 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 1,000,000 |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 10,000,000 |
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 11,000,000 |

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