v2.4.0.8

Fair Value Measurements (Fair Value And Maximum Future Funding Commitments Related To Investments) (Detail) (USD $) In Millions, unless otherwise specified | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2014 | Dec. 31, 2013
Fair Value [Member] |  |
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items] |  |
Financial | $ 266 | $ 256
Real estate | 304 | 322
Distressed | 289 | 180
Mezzanine | 300 | 276
Traditional | 960 | 813
Vintage | 10 | 13
Investment funds | 384 | 428
Total of alternative investments | 2,513 | 2,288
Maximum Future Funding Commitments [Member] |  |
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items] |  |
Financial | 127 | 129
Real estate | 43 | 92
Distressed | 132 | 230
Mezzanine | 213 | 252
Traditional | 388 | 456
Vintage | 0 | 0
Total of alternative investments | $ 903 | $ 1,159
Expected Liquidation Period Lower Range [Member] |  |
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items] |  |
Liquidation period for financial alternative investments (in years) | 5 years | 5 years
Liquidation period for real estate alternative investments (in years) | 3 years | 3 years
Liquidation period for distressed alternative investments (in years) | 6 years | 6 years
Liquidation period for mezzanine alternative investments (in years) | 6 years | 6 years
Liquidation period for traditional alternative investments (in years) | 3 years | 3 years
Liquidation period for vintage alternative investments (in years) | 1 year | 1 year
Expected Liquidation Period Upper Range [Member] |  |
Fair Value And Maximum Future Funding Commitments Related To Investments [Line Items] |  |
Liquidation period for financial alternative investments (in years) | 9 years | 9 years
Liquidation period for real estate alternative investments (in years) | 9 years | 9 years
Liquidation period for distressed alternative investments (in years) | 9 years | 9 years
Liquidation period for mezzanine alternative investments (in years) | 9 years | 9 years
Liquidation period for traditional alternative investments (in years) | 8 years | 8 years
Liquidation period for vintage alternative investments (in years) | 3 years | 3 years

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- Definition Alternative investments - Investment funds employ various investment strategies such as long/short equity and arbitrage/distressed. + References No definition available. + Details
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- Definition Alternative investments - Mezzanine consists of investments in private equity funds targeting private mezzanine debt of large cap and mid cap companies in the US and worldwide. + References No definition available. + Details
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- Definition Total of alternative investments. + References No definition available. + Details
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- Definition Alternative investments - Traditional consists of investments in private equity funds employing traditional private equity investment strategies such as buyout and venture with different geographical focuses including Brazil, India, Asia, Europe, and the US. + References No definition available. + Details
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- Definition Alternative investments - Vintage consists of investments in private equity funds made before 2002 and where the funds' commitment periods had already expired. + References No definition available. + Details
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