INVESTMENTS - Other Investments (Details) - USD ($) $ in Millions		Mar. 31, 2017	Dec. 31, 2016
Investment Holdings [Line Items]
Other Investments	[1]	$ 1,701	$ 1,450
Commercial mortgage loans
Investment Holdings [Line Items]
Other Investments		870	855
Middle market loans
Investment Holdings [Line Items]
Other Investments		439	319
Short-term investments
Investment Holdings [Line Items]
Other Investments		141	89
Policy loans
Investment Holdings [Line Items]
Other Investments		197	184
Other investments
Investment Holdings [Line Items]
Other Investments		$ 54	$ 3

[1] Includes $926 in 2017 and $819 in 2016 of loan receivables from consolidated variable interest entities