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Fair Value of Financial Instruments (Schedule Of Investment Holdings Movements) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] |  |  |  |
Issuances | $ 319 | $ 600 | $ 1,349 | $ 2,182
Sales | (235) | (39) | (655) | (68)
Maturities | (181) | (95) | (382) | (280)
Settlements | (502) | (57) | (1,036) | (208)
Calls | (45) | (16) | (123) | (23)
Total | (644) | 393 | (847) | 1,603
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member] |  |  |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] |  |  |  |
Issuances | 154 | 337 | 683 | 872
Sales | (58) |  | (230) | (18)
Maturities | (3) | (21) | (37) | (75)
Settlements | (18) | (44) | (112) | (129)
Calls | (45) | (16) | (123) | (23)
Total | 30 | 256 | 181 | 627
Foreign Government Bonds [Member] | Fixed Maturity AFS Securities [Member] |  |  |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] |  |  |  |
Maturities | (20) |  | (20) |
Total | (20) |  | (20) |
RMBS [Member] | Fixed Maturity AFS Securities [Member] |  |  |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] |  |  |  |
Issuances |  | 10 |  | 10
Total |  | 10 |  | 10
CMBS [Member] | Fixed Maturity AFS Securities [Member] |  |  |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] |  |  |  |
Issuances |  | 7 |  | 7
Total |  | 7 |  | 7
ABS [Member] | Fixed Maturity AFS Securities [Member] |  |  |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] |  |  |  |
Issuances | 74 | 79 | 353 | 489
Settlements | (14) | (10) | (35) | (12)
Total | 60 | 69 | 318 | 477
Hybrid And Redeemable Preferred Securities [Member] | Fixed Maturity AFS Securities [Member] |  |  |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] |  |  |  |
Issuances | 14 |  | 14 |
Sales |  |  | (4) |
Total | 14 |  | 10 |
Trading Securities [Member] |  |  |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] |  |  |  |
Issuances | 15 | 150 | 53 | 728
Sales |  |  | (25) |
Maturities | (20) |  | (20) |
Settlements | (115) | (4) | (148) | (5)
Total | (120) | 146 | (140) | 723
Equity Securities [Member] |  |  |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] |  |  |  |
Issuances |  |  | 21 | 43
Sales |  | (3) | (1) | (3)
Total |  | (3) | 20 | 40
Equity Securities [Member] | Fixed Maturity AFS Securities [Member] |  |  |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] |  |  |  |
Issuances | 20 |  |  |
Total | 20 |  |  |
Derivative Investments [Member] |  |  |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] |  |  |  |
Issuances | 126 | 132 | 374 | 403
Sales | (177) | (36) | (395) | (47)
Maturities | (138) | (74) | (305) | (205)
Total | (189) | 22 | (326) | 151
Indexed Annuity Ceded Embedded Derivatives [Member] | Other Assets [Member] |  |  |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] |  |  |  |
Issuances | 4 | 9 | 21 | 50
Settlements | (427) | (28) | (896) | (189)
Total | (423) | (19) | (875) | (139)
Indexed Annuity And IUL Contracts [Member] | Future Contract Benefits [Member] |  |  |  |
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract] |  |  |  |
Issuances | (88) | (124) | (170) | (420)
Settlements | 72 | 29 | 155 | 127
Total | $ (16) | $ (95) | $ (15) | $ (293)

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