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Derivative Financial Instruments (Details 4) $ in Millions | Sep. 30, 2017 USD ($) counter-party | Dec. 31, 2016 USD ($) counter-party
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Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |
Cash and securities pledged as collateral by counterparties | $ 3 |
Securities pledged as collateral to counterparties | 18 |
Collateral posted under MNAs for contracts containing credit-risk-contingent features | 7 | $ 0
Maximum amount of additional exposure for contracts with credit-risk-contingent features if all features were triggered concurrently | $ 11 |
Credit Derivatives |  |
Number of counter- parties | counter-party | 4 | 8
Notional amount | $ 260 | $ 888
Credit exposure | 4 | 23
Exposure, net of collateral | 4 | 12
Gross liability fair value of contracts containing credit-risk-contingent features | 20 | 9
Gross asset fair value of contracts containing credit-risk-contingent features and subject to MNAs | (8) | (7)
Maximum amount of additional exposure for contracts with credit-risk-contingent features if all features were triggered concurrently | $ 5 | $ 2
AA- |  |
Credit Derivatives |  |
Number of counter- parties | counter-party | 1 | 2
Notional amount | $ 11 | $ 80
Credit exposure | 0 | 2
Exposure, net of collateral | $ 0 | $ 2
A plus |  |
Credit Derivatives |  |
Number of counter- parties | counter-party | 3 | 5
Notional amount | $ 249 | $ 698
Credit exposure | 4 | 20
Exposure, net of collateral | $ 4 | $ 9
A- |  |
Credit Derivatives |  |
Number of counter- parties | counter-party | 0 | 1
Notional amount | $ 0 | $ 110
Credit exposure | 0 | 1
Exposure, net of collateral | $ 0 | $ 1

X
- Definition This element represents cash and securities pledged as collateral from counterparties. + References No definition available. + Details
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- Definition Collateral Already Posted, Aggregate Fair Value, Without Credit-Risk-Contingent Features + References No definition available. + Details
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- Definition The amount of credit exposure by counterparties related to derivative contracts. + References No definition available. + Details
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- Definition The amount of credit exposure by counterparties net of collateral received, related to derivative contracts. + References No definition available. + Details
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- Definition Fair value of derivative asset, presented on a gross basis containing credit risk contingent features and which is subject to master netting arrangements. + References No definition available. + Details
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- Definition Fair value of derivative liabilities, presented on a gross basis containing credit risk contingent features. + References No definition available. + Details
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- Definition The notional amount of derivative contracts for which the entity has counterparty credit exposure. + References No definition available. + Details
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- Definition The number of counterparties to which the entity has counterparty credit exposure related to derivative contracts. + References No definition available. + Details
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- Definition This element represents securities pledged to counterparties as collateral for credit exposure. + References No definition available. + Details
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- Definition The aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624258-113959 + Details
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Period Type: | instant

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- Definition The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624258-113959 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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