INVESTMENTS (TEXTUAL) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Investments In Fixed Maturity Securities Other Disclosure [Abstract]
Debt securities exposure in single issuer greater than stated percentage of total investments	0.30%
Available-for-sale securities, amortized cost basis	$ 32,571		$ 31,235
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	249		194
Carrying value of fixed maturities non-income producing	5
Investment expenses	16	$ 11
Trading securities, Cost	7,086		6,866
Trading securities, at fair value	7,124		6,805
Separate account equity investment carrying value	82		82
Separate account equity investment cost	72		72
Equity Securities, Carrying Value	35		32
Equity Securities, Amortized Cost	35		34
Other Than Investment Grade
Investments In Fixed Maturity Securities Other Disclosure [Abstract]
Available-for-sale securities, amortized cost	$ 1,633		$ 1,310
Percentage of available for sale securities	5.00%		4.20%
Subprime residential mortgage loans
Investments In Fixed Maturity Securities Other Disclosure [Abstract]
Other investments and securities, at cost	$ 7		$ 7
Alt residential mortgage loans
Investments In Fixed Maturity Securities Other Disclosure [Abstract]
Other investments and securities, at cost	6		6
Public corporate
Investments In Fixed Maturity Securities Other Disclosure [Abstract]
Debt securities exposure in single issuer of total investments	160		157
Available-for-sale securities, amortized cost basis	13,064		12,890
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	47		73
Fixed Maturities
Investments In Fixed Maturity Securities Other Disclosure [Abstract]
Available-for-sale securities, amortized cost basis	32,536		31,201
Fixed Maturities | Other Than Investment Grade
Investments In Fixed Maturity Securities Other Disclosure [Abstract]
Gross Unrealized Losses	$ 109		$ 97