INVESTMENTS - Other Investments (Details) - USD ($) $ in Millions		Mar. 31, 2020	Dec. 31, 2019
Investment Holdings [Line Items]
Other investments		$ 1,843	$ 1,477
Policy loans
Investment Holdings [Line Items]
Other investments		253	250
Short-term investments
Investment Holdings [Line Items]
Other investments	[1]	892	628
Limited partnerships
Investment Holdings [Line Items]
Other investments		669	569
Other
Investment Holdings [Line Items]
Other investments		$ 29	$ 30

[1] Includes securities lending collateral