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Derivative Financial Instruments - FGL's Exposure to Credit Loss on Call Options Held (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011
Derivatives, Fair Value [Line Items] |  |
Notional Amount | $ 5,830,395 | $ 5,604,269
Fair Value | 200,667 | 52,335
Bank of America [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | 1,884,047 | 1,692,142
Fair Value | 64,101 | 14,637
Credit Rating (Moody's/S&P) | Baa2/A- |
Deutsche Bank [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | 1,816,532 | 1,463,596
Fair Value | 61,704 | 11,402
Credit Rating (Moody's/S&P) | A2/A+ |
Morgan Stanley [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | 1,634,686 | 1,629,247
Fair Value | 51,630 | 15,373
Credit Rating (Moody's/S&P) | Baa1/A- |
Royal Bank of Scotland [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | 353,875 |
Fair Value | 19,595 |
Credit Rating (Moody's/S&P) | Baa1/A- |
Barclay's Bank [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | 131,255 | 385,189
Fair Value | 3,081 | 4,105
Credit Rating (Moody's/S&P) | A2/A+ |
Credit Suisse [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | 10,000 | 327,095
Fair Value | 556 | 2,785
Credit Rating (Moody's/S&P) | A2/A |
Nomura [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount |  | 107,000
Fair Value |  | $ 4,033
Credit Rating (Moody's/S&P) | Baa2/A |

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- Definition Derivative instrument credit rating. + References No definition available. + Details
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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 Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation 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 Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 -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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 + Details
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- Details
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