INSURANCE LIABILITIES - TEXTUAL (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Net Amount at Risk by Product and Guarantee [Line Items]
GMIB reinsurance contract asset, at fair value	$ 1,571	$ 10,488	$ 10,900
GMDB
Net Amount at Risk by Product and Guarantee [Line Items]
Account value hedged of variable annuity contracts	69,997
Net amount at risk hedged of variable annuity contracts
GMIB
Net Amount at Risk by Product and Guarantee [Line Items]
Account value hedged of variable annuity contracts	59,052
Net amount at risk hedged of variable annuity contracts	6,602
Immediate Variable Annuity | GMDB
Net Amount at Risk by Product and Guarantee [Line Items]
Net amount at risk hedged of variable annuity contracts	$ 16,706