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Fair Value of Financial Instruments (Components Of The Transfers In And Out Of Level 3) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract] |  |  |  |
Transfers Into Level 3 | $ 51 | $ 11 | $ 141 | $ 80
Transfers Out of Level 3 | (286) | (159) | (815) | (530)
Transfers Into or Out of Level 3, Net | (235) | (148) | (674) | (450)
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member] |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract] |  |  |  |
Transfers Into Level 3 | 51 | 11 | 136 | 54
Transfers Out of Level 3 |  | (42) | (171) | (125)
Transfers Into or Out of Level 3, Net | 51 | (31) | (35) | (71)
ABS [Member] | Fixed Maturity AFS Securities [Member] |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract] |  |  |  |
Transfers Out of Level 3 | (173) | (111) | (396) | (204)
Transfers Into or Out of Level 3, Net | (173) | (111) | (396) | (204)
RMBS [Member] | Fixed Maturity AFS Securities [Member] |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract] |  |  |  |
Transfers Out of Level 3 |  |  | (7) | (12)
Transfers Into or Out of Level 3, Net |  |  | (7) | (12)
CMBS [Member] | Fixed Maturity AFS Securities [Member] |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract] |  |  |  |
Transfers Out of Level 3 |  |  |  | (21)
Transfers Into or Out of Level 3, Net |  |  |  | (21)
Equity AFS Securities [Member] |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract] |  |  |  |
Transfers Out of Level 3 |  |  |  | (162)
Transfers Into or Out of Level 3, Net |  |  |  | (162)
Trading Securities [Member] |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract] |  |  |  |
Transfers Into Level 3 |  |  | 5 |
Transfers Out of Level 3 | (113) | (6) | (241) | (6)
Transfers Into or Out of Level 3, Net | $ (113) | $ (6) | $ (236) | (6)
Equity Securities [Member] |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract] |  |  |  |
Transfers Into Level 3 |  |  |  | 26
Transfers Into or Out of Level 3, Net |  |  |  | $ 26

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- Definition Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Amount of transfer of financial instrument classified as an asset into (out of) level 3 of the fair value hierarchy. + References No definition available. + Details
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