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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 | 9 Months Ended |
--- | --- | ---
Sep. 30, 2020 USD ($) security | Dec. 31, 2019 USD ($) security
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Less Than or Equal to Twelve Months | $ 9,460 | $ 5,673
Greater Than Twelve Months | 1,125 | 1,848
Fair Value - Total | 10,585 | 7,521
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months | 304 | 73
Greater Than Twelve Months | 134 | 170
Gross Unrealized Losses - Total | $ 438 | $ 243
Total number of AFS securities in an unrealized loss position | security | 1,223 | 895
Unrealized holding gains (losses) arising during the period | $ 3 |
Corporate Bonds [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Less Than or Equal to Twelve Months | 5,719 | $ 2,935
Greater Than Twelve Months | 660 | 1,406
Fair Value - Total | 6,379 | 4,341
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months | 264 | 46
Greater Than Twelve Months | 103 | 141
Gross Unrealized Losses - Total | 367 | 187
State And Municipal Bonds [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Less Than or Equal to Twelve Months | 194 | 333
Greater Than Twelve Months |  | 18
Fair Value - Total | 194 | 351
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months | 3 | 7
Gross Unrealized Losses - Total | 3 | 7
Foreign Government Bonds [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Less Than or Equal to Twelve Months | 49 |
Fair Value - Total | 49 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months | 3 |
Gross Unrealized Losses - Total | 3 |
RMBS [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Less Than or Equal to Twelve Months |  | 536
Greater Than Twelve Months |  | 15
Fair Value - Total |  | 551
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months |  | 10
Gross Unrealized Losses - Total |  | 10
CMBS [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Less Than or Equal to Twelve Months | 59 | 48
Greater Than Twelve Months | 1 | 4
Fair Value - Total | 60 | 52
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months | 1 | 1
Gross Unrealized Losses - Total | 1 | 1
ABS [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Less Than or Equal to Twelve Months | 3,327 | 1,792
Greater Than Twelve Months | 372 | 303
Fair Value - Total | 3,699 | 2,095
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months | 13 | 8
Greater Than Twelve Months | 9 | 10
Gross Unrealized Losses - Total | 22 | 18
Hybrid And Redeemable Preferred Securities [Member] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  |
Less Than or Equal to Twelve Months | 112 | 29
Greater Than Twelve Months | 92 | 102
Fair Value - Total | 204 | 131
Available-for-sale Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses and OTTI |  |
Less Than or Equal to Twelve Months | 20 | 1
Greater Than Twelve Months | 22 | 19
Gross Unrealized Losses - Total | $ 42 | $ 20

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