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INVESTMENTS - Other Investments (Details) - USD ($) $ in Millions | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Investment Holdings [Line Items] |  |  |
Other investments |  | $ 3,612 | $ 2,429
Policy loans |  |  |
Investment Holdings [Line Items] |  |  |
Other investments |  | 241 | 260
Short-term investments |  |  |
Investment Holdings [Line Items] |  |  |
Other investments | [1] | 1,833 | 1,139
Limited partnerships |  |  |
Investment Holdings [Line Items] |  |  |
Other investments |  | 1,519 | 1,004
Other |  |  |
Investment Holdings [Line Items] |  |  |
Other investments |  | $ 19 | $ 26
[1] | Includes securities lending collateral

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