INVESTMENTS - Other Investments (Details) - USD ($) $ in Millions		Sep. 30, 2019	Dec. 31, 2018
Investment Holdings [Line Items]
Other investments		$ 1,507	$ 787
Policy loans
Investment Holdings [Line Items]
Other investments		250	232
Short-term investments
Investment Holdings [Line Items]
Other investments	[1]	722	152
Limited partnerships
Investment Holdings [Line Items]
Other investments		505	377
Other
Investment Holdings [Line Items]
Other investments		$ 30	$ 26

[1] Includes securities lending collateral