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Investments (Fair Value And Gross Unrealized Losses In A Continuous Unrealized Loss Position) (Details) $ in Millions | Jun. 30, 2019 USD ($) security | Dec. 31, 2018 USD ($) security
--- | --- | ---
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Total number of AFS securities in an unrealized loss position | security | 890 | 3,414
Fixed Maturity AFS Securities [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Less Than or Equal to Twelve Months | $ 1,903 | $ 35,246
Greater Than Twelve Months | 7,129 | 8,671
Fair Value - Total | 9,032 | 43,917
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months | 46 | 1,589
Greater Than Twelve Months | 362 | 856
Gross Unrealized Losses - Total | 408 | 2,445
Fixed Maturity AFS Securities [Member] | Corporate Bonds [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Less Than or Equal to Twelve Months | 1,188 | 32,493
Greater Than Twelve Months | 6,168 | 7,228
Fair Value - Total | 7,356 | 39,721
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months | 42 | 1,530
Greater Than Twelve Months | 309 | 735
Gross Unrealized Losses - Total | 351 | 2,265
Fixed Maturity AFS Securities [Member] | ABS [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Less Than or Equal to Twelve Months | 36 | 117
Greater Than Twelve Months | 86 | 143
Fair Value - Total | 122 | 260
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months |  | 2
Greater Than Twelve Months | 10 | 14
Gross Unrealized Losses - Total | 10 | 16
Fixed Maturity AFS Securities [Member] | U.S. Government Bonds [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Less Than or Equal to Twelve Months |  | 70
Greater Than Twelve Months |  | 23
Fair Value - Total |  | 93
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 |  | 1
Gross Unrealized Losses - Total |  | 2
Fixed Maturity AFS Securities [Member] | RMBS [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Less Than or Equal to Twelve Months | 11 | 472
Greater Than Twelve Months | 480 | 863
Fair Value - Total | 491 | 1,335
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 | 11 | 60
Gross Unrealized Losses - Total | 11 | 70
Fixed Maturity AFS Securities [Member] | CMBS [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Less Than or Equal to Twelve Months |  | 470
Greater Than Twelve Months |  | 82
Fair Value - Total |  | 552
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months |  | 11
Greater Than Twelve Months |  | 5
Gross Unrealized Losses - Total |  | 16
Fixed Maturity AFS Securities [Member] | CLOs [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Less Than or Equal to Twelve Months | 481 | 1,124
Greater Than Twelve Months | 204 | 103
Fair Value - Total | 685 | 1,227
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months | 2 | 21
Greater Than Twelve Months | 5 | 3
Gross Unrealized Losses - Total | 7 | 24
Fixed Maturity AFS Securities [Member] | State And Municipal Bonds [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Less Than or Equal to Twelve Months | 115 | 404
Greater Than Twelve Months | 82 | 96
Fair Value - Total | 197 | 500
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months | 1 | 8
Greater Than Twelve Months | 3 | 10
Gross Unrealized Losses - Total | 4 | 18
Fixed Maturity AFS Securities [Member] | Hybrid And Redeemable Preferred Securities [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Less Than or Equal to Twelve Months | 72 | 96
Greater Than Twelve Months | 109 | 133
Fair Value - Total | 181 | 229
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months | 1 | 6
Greater Than Twelve Months | 24 | 28
Gross Unrealized Losses - Total | $ 25 | $ 34

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