INSURANCE LIABILITIES (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Movement In Guaranteed Benefit Liability Gross [Line Items]
Opening Balance	$ 7,035	$ 6,877	$ 6,427
Paid guarantee benefits	(505)	(638)	(402)
Other changes in reserves	2,352	796	852
Closing Balance	8,882	7,035	6,877
GMDB
Movement In Guaranteed Benefit Liability Gross [Line Items]
Opening Balance	3,165	2,991	1,725
Paid guarantee benefits	(354)	(357)	(313)
Other changes in reserves	1,269	531	1,579
Closing Balance	4,080	3,165	2,991
Guaranteed Minimum Death Benefit Reinsurance Ceded [Abstract]
Opening Balance	1,558	1,430	833
Paid guarantee benefits	(171)	(174)	(148)
Other changes in reserve	643	302	745
Closing Balance	2,030	1,558	1,430
GMIB
Movement In Guaranteed Benefit Liability Gross [Line Items]
Opening Balance	3,870	3,886	4,702
Paid guarantee benefits	(151)	(281)	(89)
Other changes in reserves	1,083	265	(727)
Closing Balance	$ 4,802	$ 3,870	$ 3,886