INVESTMENTS (AVAILABLE FOR SALE SECURITIES) (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 32,571	$ 31,235
Gross Unrealized Gains	2,316	1,432
Gross Unrealized Losses	332	742
Fair Value	34,555	31,925
OTTI in AOCI	12	12
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in one year or less, Amortized Cost	1,248
Due in years two through five, Amortized Cost	7,527
Due in years six through ten, Amortized Cost	10,223
Due after ten years, Amortized Cost	11,786
Available for sale securities debt maturities single maturity date, Amortized Cost, Subtotal	30,784
Fixed maturities available for sale, amortized cost	32,536
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in one year or less, Fair Value	1,259
Due in years two through five, Fair Value	8,009
Due in years six through ten, Fair Value	10,562
Due after ten years, Fair Value	12,905
Available for sale securities debt maturities single maturity date, Fair Value, Subtotal	32,735
Available-for-sale securities, debt maturities, Fair Value, Total	34,520
Public corporate
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	13,064	12,890
Gross Unrealized Gains	883	688
Gross Unrealized Losses	92	202
Fair Value	13,855	13,376
OTTI in AOCI	0	0
Private corporate
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	6,714	6,818
Gross Unrealized Gains	325	232
Gross Unrealized Losses	54	124
Fair Value	6,985	6,926
OTTI in AOCI	0	0
U.S. Treasury, government and agency
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	10,226	8,800
Gross Unrealized Gains	856	280
Gross Unrealized Losses	76	305
Fair Value	11,006	8,775
OTTI in AOCI	0	0
State and Political Sub- divisions
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	437	437
Gross Unrealized Gains	81	68
Gross Unrealized Losses	1	1
Fair Value	517	504
OTTI in AOCI	0	0
Foreign Govts
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	343	397
Gross Unrealized Gains	40	36
Gross Unrealized Losses	11	18
Fair Value	372	415
OTTI in AOCI	0	0
Commercial Mortgage- backed
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	541	591
Gross Unrealized Gains	26	29
Gross Unrealized Losses	96	87
Fair Value	471	533
OTTI in AOCI	9	9
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Available-for-sale securities, debt maturities, without single maturity date, Amortized Cost	541
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, debt maturities, without single maturity date, Fair Value	471
Residential Mortgage- backed
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	582	608
Gross Unrealized Gains	35	32
Gross Unrealized Losses	0	0
Fair Value	617	640
OTTI in AOCI	0	0
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Available-for-sale securities, debt maturities, without single maturity date, Amortized Cost	582
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, debt maturities, without single maturity date, Fair Value	617
Asset- backed
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	60	68
Gross Unrealized Gains	9	10
Gross Unrealized Losses	1	1
Fair Value	68	77
OTTI in AOCI	3	3
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Available-for-sale securities, debt maturities, without single maturity date, Amortized Cost	60
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, debt maturities, without single maturity date, Fair Value	68
Redeemable Preferred Stock
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	569	592
Gross Unrealized Gains	61	57
Gross Unrealized Losses	1	2
Fair Value	629	647
OTTI in AOCI	0	0
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Available-for-sale securities, debt maturities, without single maturity date, Amortized Cost	569
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, debt maturities, without single maturity date, Fair Value	629
Fixed Maturities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	32,536	31,201
Gross Unrealized Gains	2,316	1,432
Gross Unrealized Losses	332	740
Fair Value	34,520	31,893
OTTI in AOCI	12	12
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Fixed maturities available for sale, amortized cost	32,536	31,201
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	35	34
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	2
Fair Value	35	32
OTTI in AOCI	$ 0	$ 0