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INVESTMENTS - Investments in Variable Interest Entities (Detail) (USD $) In Millions, unless otherwise specified | Mar. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Variable Interest Entity [Line Items] |  |
Cost or Amortized Cost | $ 45,204 | $ 54,426
Securities held to maturity, fixed maturities, fair value | 47,047 | 54,841
Asset derivatives | 430 | 345
Assets, fair value | 62,459 | 63,964
Liabilities | 105,003 | 115,116
Liabilities, Fair Value Disclosure | 643 | 934
Variable Interest Entity, Consolidated |  |
Variable Interest Entity [Line Items] |  |
Securities available for sale, fixed maturities, amortized cost | 4,721 | 5,058
Securities available for sale, fixed maturities, fair value | 5,377 | 5,787
Securities available for sale, perpetual securities, amortized cost | 520 | 559
Securities available for sale, perpetual securities, fair value | 455 | 574
Cost or Amortized Cost | 266 | 289
Securities held to maturity, fixed maturities, fair value | 259 | 287
Asset derivative, amortized cost | 158 | 191
Asset derivatives | 158 | 191
Assets, amortized cost | 5,665 | 6,097
Assets, fair value | 6,249 | 6,839
Liability derivatives, amortized cost | 371 | 399
Liability derivatives | 371 | 399
Liabilities | 371 | 399
Liabilities, Fair Value Disclosure | $ 371 | $ 399

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