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Derivative Assets And Liabilities Table - Gross FV and Netting Offset (Details) - USD ($) $ in Millions | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | $ 541 | $ 560
Derivative Liability, Fair Value, Gross Liability | (877) | (746)
Counterparty netting | (67) | (47)
Counterparty netting | 67 | 47
Payments on margin deposit | (406) | (397)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset | 406 | 397
Derivative Asset, Fair Value, Amount Not Offset Against Collateral | 68 | 116
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | 404 | 302
Without offsetting agreements [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 0 | 0
Derivative Liability, Fair Value, Gross Liability | (354) | (163)
OTC Contracts [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 121 | 158
Derivative Liability, Fair Value, Gross Liability | (85) | (173)
Broker cleared derivative contracts [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 420 | 402
Derivative Liability, Fair Value, Gross Liability | $ (438) | $ (410)

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