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INVESTMENTS - Investments in Variable Interest Entities Not Consolidated (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Variable Interest Entity [Line Items] |  |  |
Available for sale, fixed maturity securities, amortized cost |  | $ 79,371 | $ 76,856
Available for sale, fixed maturity securities |  | 91,262 | 82,895
Securities held to maturity, fixed maturities, amortized cost |  | 30,085 | 30,318
Held to maturity, fixed maturity securities, fair value |  | 37,594 | 36,722
Other investments |  | 1,477 | 787
Assets, fair value |  | 98,070 | 88,788
Variable Interest Entity, Not Consolidated |  |  |
Variable Interest Entity [Line Items] |  |  |
Available for sale, fixed maturity securities, amortized cost |  | 4,129 | 4,575
Available for sale, fixed maturity securities |  | 4,884 | 4,982
Securities held to maturity, fixed maturities, amortized cost |  | 1,848 | 2,007
Held to maturity, fixed maturity securities, fair value |  | 2,236 | 2,254
Other investments | [1] | 75 | 49
Other investments, fair value | [1] | 74 | 49
Assets, amortized cost |  | 6,052 | 6,631
Assets, fair value |  | $ 7,194 | $ 7,285
[1] | Consists entirely of alternative investments in limited partnerships

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