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INVESTMENTS - Total Investments in Bank and Financial Institution Sector, Including those Classified as Perpetual Securities (Detail) (Banks/financial Institutions, USD $) In Millions, unless otherwise specified | Mar. 31, 2014 | Dec. 31, 2013
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Summary of Investment Holdings [Line Items] |  |
Amortized Cost | $ 15,507 | $ 15,205
Fair Value | 15,856 | 15,375
Percentage of Total Investment Portfolio, Amortized Cost | 15.00% | 15.00%
Percentage of Total Investment Portfolio, Fair Value | 15.00% | 15.00%
Fixed maturities: |  |
Summary of Investment Holdings [Line Items] |  |
Amortized Cost | 12,664 | 12,427
Fair Value | 13,069 | 12,637
Percentage of Total Investment Portfolio, Amortized Cost | 12.00% | 12.00%
Percentage of Total Investment Portfolio, Fair Value | 12.00% | 12.00%
Perpetual securities: | Upper Tier II: |  |
Summary of Investment Holdings [Line Items] |  |
Amortized Cost | 1,967 | 1,920
Fair Value | 1,965 | 1,913
Percentage of Total Investment Portfolio, Amortized Cost | 2.00% | 2.00%
Percentage of Total Investment Portfolio, Fair Value | 2.00% | 2.00%
Perpetual securities: | Tier I: |  |
Summary of Investment Holdings [Line Items] |  |
Amortized Cost | 876 | 858
Fair Value | $ 822 | $ 825
Percentage of Total Investment Portfolio, Amortized Cost | 1.00% | 1.00%
Percentage of Total Investment Portfolio, Fair Value | 1.00% | 1.00%

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