BUSINESS SEGMENT INFORMATION (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Segment revenues	$ 318	$ 5,714	$ 220	$ 3,567	$ 4,656	$ 3,754	$ 3,524	$ 3,706	$ 9,819	$ 15,640	$ 2,840
Interest Expense, Debt									3	2	3
Intersegment investment advisory and other fees									1,056	1,062	1,010
Segment earnings (loss) from operations, before income taxes									1,650	6,115	(5,309)
Assets	194,626				196,005				194,626	196,005
Securities segregated in a special reserve bank custody, fair value	565				476				565	476
Consolidation/ Elimination
Segment Reporting Information [Line Items]
Segment revenues									(28)	(27)	(21)
Segment earnings (loss) from operations, before income taxes									(1)	0	(1)
Assets	(7)				(3)				(7)	(3)
Insurance
Segment Reporting Information [Line Items]
Segment revenues									6,822	12,656	(54)
Segment earnings (loss) from operations, before income taxes									1,033	5,512	(5,872)
Assets	182,738				184,018				182,738	184,018
Insurance | Intersegment Eliminations
Segment Reporting Information [Line Items]
Interest Expense, Debt									45	40	37
Investment Management
Segment Reporting Information [Line Items]
Segment revenues									3,025	3,011	2,915
Segment earnings (loss) from operations, before income taxes									618	603	564
Assets	11,895				11,990				11,895	11,990
Securities segregated in a special reserve bank custody, fair value	$ 460				$ 415				460	415
Investment Management | Intersegment Eliminations
Segment Reporting Information [Line Items]
Intersegment investment advisory and other fees									$ 73	$ 67	$ 58