INVESTMENTS - Other Investments (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Investment [Line Items]
Other investments		$ 2,429	$ 1,477
Policy loans
Investment [Line Items]
Other investments		260	250
Short-term investments
Investment [Line Items]
Other investments	[1]	1,139	628
Limited partnerships
Investment [Line Items]
Other investments		1,004	569
Other Investments
Investment [Line Items]
Other investments		$ 26	$ 30

[1] Includes securities lending collateral