INVESTMENTS - Other Investments (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Investment [Line Items]
Other investments		$ 1,477	$ 787
Policy loans
Investment [Line Items]
Other investments		250	232
Short-term investments
Investment [Line Items]
Other investments	[1]	628	152
Limited partnerships
Investment [Line Items]
Other investments		569	377
Other Investments
Investment [Line Items]
Other investments		$ 30	$ 26

[1] Includes securities lending collateral