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Derivative Financial Instruments (Tables) | 6 Months Ended
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Jun. 30, 2013
Summary of Derivative Instruments [Abstract] |
Summary of aggregate contractual or notional amounts and gross estimated fair values related to derivative financial instruments | Derivative Financial Instruments
June 30, 2013 | Contractual/ Notional Amount |  | Estimated Fair Value
(In millions) |  | Asset |  | (Liability)
Without hedge designation |  |  |  |  |
Credit default swaps - purchased protection | $ | 20 |  |  | $ | — |  |  | $ | — |
Currency forwards | 41 |  |  | — |  |  | — |
Equity warrants | 5 |  |  | — |  |  | — |
Total | $ | 66 |  |  | $ | — |  |  | $ | — |
December 31, 2012 | Contractual/ Notional Amount |  | Estimated Fair Value
(In millions) |  | Asset |  | (Liability)
Without hedge designation |  |  |  |  |
Credit default swaps - purchased protection | $ | 20 |  |  | $ | — |  |  | $ | (1 | )
Currency forwards | 59 |  |  | — |  |  | (2 | )
Equity warrants | 5 |  |  | — |  |  | — |
Total | $ | 84 |  |  | $ | — |  |  | $ | (3 | )

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- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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