INVESTMENTS (AVAILABLE FOR SALE SECURITIES) (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 34,042	$ 31,235
Gross Unrealized Gains	3,266	1,432
Gross Unrealized Losses	172	742
Fair Value	37,136	31,925
OTTI in AOCI	11	12
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in one year or less, Amortized Cost	1,328
Due in years two through five, Amortized Cost	7,525
Due in years six through ten, Amortized Cost	9,582
Due after ten years, Amortized Cost	13,888
Available for sale securities debt maturities single maturity date, Amortized Cost, Subtotal	32,323
Fixed maturities available for sale, amortized cost	33,962
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in one year or less, Fair Value	1,344
Due in years two through five, Fair Value	8,078
Due in years six through ten, Fair Value	10,160
Due after ten years, Fair Value	15,800
Available for sale securities debt maturities single maturity date, Fair Value, Subtotal	35,382
Available-for-sale securities, debt maturities, Fair Value, Total	37,056
Public corporate
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	12,983	12,890
Gross Unrealized Gains	1,098	688
Gross Unrealized Losses	17	202
Fair Value	14,064	13,376
OTTI in AOCI	0	0
Private corporate
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	6,691	6,818
Gross Unrealized Gains	421	232
Gross Unrealized Losses	24	124
Fair Value	7,088	6,926
OTTI in AOCI	0	0
U.S. Treasury, government and agency
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	11,849	8,800
Gross Unrealized Gains	1,475	280
Gross Unrealized Losses	25	305
Fair Value	13,299	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	98	68
Gross Unrealized Losses	0	1
Fair Value	535	504
OTTI in AOCI	0	0
Foreign Govts
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	363	397
Gross Unrealized Gains	42	36
Gross Unrealized Losses	9	18
Fair Value	396	415
OTTI in AOCI	0	0
Commercial Mortgage- backed
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	489	591
Gross Unrealized Gains	25	29
Gross Unrealized Losses	94	87
Fair Value	420	533
OTTI in AOCI	8	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	489
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, debt maturities, without single maturity date, Fair Value	420
Residential Mortgage- backed
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	551	608
Gross Unrealized Gains	35	32
Gross Unrealized Losses	0	0
Fair Value	586	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	551
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, debt maturities, without single maturity date, Fair Value	586
Asset- backed
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	56	68
Gross Unrealized Gains	11	10
Gross Unrealized Losses	1	1
Fair Value	66	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	56
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, debt maturities, without single maturity date, Fair Value	66
Redeemable Preferred Stock
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	543	592
Gross Unrealized Gains	61	57
Gross Unrealized Losses	2	2
Fair Value	602	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	543
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, debt maturities, without single maturity date, Fair Value	602
Fixed Maturities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	33,962	31,201
Gross Unrealized Gains	3,266	1,432
Gross Unrealized Losses	172	740
Fair Value	37,056	31,893
OTTI in AOCI	11	12
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Fixed maturities available for sale, amortized cost	33,962	31,201
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	80	34
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	2
Fair Value	80	32
OTTI in AOCI	$ 0	$ 0