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INVESTMENTS - Investments in Variable Interest Entities Not Consolidated (Details) - USD ($) $ in Millions | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Variable Interest Entity [Line Items] |  |  |
Securities held to maturity, fixed maturities, amortized cost |  | $ 31,998 | $ 33,350
Securities held to maturity, fixed maturities, fair value |  | 38,599 | 40,021
Other Investments | [1] | 2,358 | 1,450
Assets, fair value |  | 88,669 | 83,044
Variable Interest Entity, Not Consolidated |  |  |
Variable Interest Entity [Line Items] |  |  |
Securities available for sale, fixed maturities, amortized cost |  | 4,766 | 4,729
Securities available for sale, fixed maturities, fair value |  | 5,439 | 5,261
Securities available for sale, perpetual securities, amortized cost |  | 177 | 172
Securities available for sale, perpetual securities, fair value |  | 220 | 200
Securities held to maturity, fixed maturities, amortized cost |  | 2,645 | 2,563
Securities held to maturity, fixed maturities, fair value |  | 3,047 | 2,948
Other Investments |  | 50 | 1
Other investments, fair value |  | 50 | 1
Assets, amortized cost |  | 7,638 | 7,465
Assets, fair value |  | $ 8,756 | $ 8,410
[1] | Includes $1,500 in 2017 and $819 in 2016 of loan receivables and limited partnerships from consolidated variable interest entities

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