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DERIVATIVE INSTRUMENTS - Fair Value and Notional Amounts of Derivatives With Counterparty Credit Risk (Details) - USD ($) $ in Millions | Sep. 30, 2017 | Dec. 31, 2016
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Derivative Instruments and Hedging Activities Disclosure [Line Items] |  |
Notional Amount of Derivatives | $ 28,250 | $ 43,927
Asset Derivatives Fair Value | 479 | 1,207
Liability Derivatives Fair Value | (974) | (1,998)
AA |  |
Derivative Instruments and Hedging Activities Disclosure [Line Items] |  |
Notional Amount of Derivatives | 5,553 | 6,844
Asset Derivatives Fair Value | 90 | 247
Liability Derivatives Fair Value | (189) | (308)
A |  |
Derivative Instruments and Hedging Activities Disclosure [Line Items] |  |
Notional Amount of Derivatives | 22,257 | 36,019
Asset Derivatives Fair Value | 381 | 900
Liability Derivatives Fair Value | (718) | (1,621)
BBB |  |
Derivative Instruments and Hedging Activities Disclosure [Line Items] |  |
Notional Amount of Derivatives | 440 | 1,064
Asset Derivatives Fair Value | 8 | 60
Liability Derivatives Fair Value | $ (67) | $ (69)

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition This item represents disclosure of all significant concentrations of credit risk or market risk arising from the subject financial instrument (as defined), whether from an individual counterparty or groups of counterparties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 15 -Paragraph 83 -URI http://asc.fasb.org/extlink&oid=77898254&loc=d3e34841-113949 + Details
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