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Derivative Instruments (Effect Of Derivative Instruments On Consolidated Statements Of Operations) (Detail) (Nondesignated [Member], USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Derivative [Line Items] |  |  |  |
Net gain/(loss) recognized in income | $ 16 | $ 275 | $ 390 | $ 96
Unrealized Gains Losses On Insured Derivatives [Member] | Credit Default Swap [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Net gain/(loss) recognized in income | 48 | 287 | 848 | 1,502
Unrealized Gains Losses On Insured Derivatives [Member] | All Other [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Net gain/(loss) recognized in income |  | (2) | 15 | 60
Realized Gains Losses And Other Settlements On Insured Derivatives [Member] | Credit Default Swap [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Net gain/(loss) recognized in income | (24) | (28) | (387) | (1,548)
Realized Gains Losses And Other Settlements On Insured Derivatives [Member] | All Other [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Net gain/(loss) recognized in income |  |  | (30) |
Foreign Exchange And Other Derivative Financial Instruments [Member] | Interest Rate Swap [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Net gain/(loss) recognized in income | (7) | 17 | (52) | 58
Foreign Exchange And Other Derivative Financial Instruments [Member] | Currency Swap [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Net gain/(loss) recognized in income |  | (1) |  | 1
Foreign Exchange And Other Derivative Financial Instruments [Member] | All Other [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Net gain/(loss) recognized in income | (5) |  | (8) |
Foreign Exchange And Other Derivative Financial Instruments Attributable To V I E [Member] | Interest Rate Swaps V I E [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Net gain/(loss) recognized in income |  | 2 |  | 17
Foreign Exchange And Other Derivative Financial Instruments Attributable To V I E [Member] | Currency Swaps Vie [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Net gain/(loss) recognized in income | $ 4 | $ 0 | $ 4 | $ 6

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
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- Details
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