INVESTMENTS (AVAILABLE FOR SALE SECURITIES) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 32,371	$ 32,236
Gross Unrealized Gains	1,659	1,306
Gross Unrealized Losses	520	859
Fair Value	33,510	32,683
OTTI in AOCI	7	10
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in one year or less, Amortized Cost	1,778
Due in years two through five, Amortized Cost	7,379
Due in years six through ten, Amortized Cost	9,315
Due after ten years, Amortized Cost	12,651
Available for sale securities debt maturities single maturity date, Amortized Cost, Subtotal	31,123
Fixed maturities available for sale, amortized cost	32,239
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in one year or less, Fair Value	1,801
Due in years two through five, Fair Value	7,733
Due in years six through ten, Fair Value	9,557
Due after ten years, Fair Value	13,126
Available for sale securities debt maturities single maturity date, Fair Value, Subtotal	32,217
Available-for-sale securities, debt maturities, Fair Value, Total	33,378
Public corporate
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	12,530	12,418
Gross Unrealized Gains	745	675
Gross Unrealized Losses	45	81
Fair Value	13,230	13,012
OTTI in AOCI	0	0
Private corporate
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	7,075	6,880
Gross Unrealized Gains	256	215
Gross Unrealized Losses	44	55
Fair Value	7,287	7,040
OTTI in AOCI	0	0
U.S. Treasury, government and agency
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	10,756	10,739
Gross Unrealized Gains	479	221
Gross Unrealized Losses	386	624
Fair Value	10,849	10,336
OTTI in AOCI	0	0
State and Political Sub- divisions
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	419	432
Gross Unrealized Gains	66	63
Gross Unrealized Losses	1	2
Fair Value	484	493
OTTI in AOCI	0	0
Foreign Govts
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	343	375
Gross Unrealized Gains	30	29
Gross Unrealized Losses	6	14
Fair Value	367	390
OTTI in AOCI	0	0
Commercial Mortgage- backed
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	329	415
Gross Unrealized Gains	10	28
Gross Unrealized Losses	36	72
Fair Value	303	371
OTTI in AOCI	4	7
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	329
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, debt maturities, without single maturity date, Fair Value	303
Residential Mortgage- backed
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	264	294
Gross Unrealized Gains	17	20
Gross Unrealized Losses	0	0
Fair Value	281	314
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	264
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, debt maturities, without single maturity date, Fair Value	281
Asset- backed
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	38	51
Gross Unrealized Gains	3	10
Gross Unrealized Losses	1	1
Fair Value	40	60
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	38
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, debt maturities, without single maturity date, Fair Value	40
Redeemable Preferred Stock
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	485	519
Gross Unrealized Gains	53	45
Gross Unrealized Losses	1	10
Fair Value	537	554
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	485
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, debt maturities, without single maturity date, Fair Value	537
Fixed Maturities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	32,239	32,123
Gross Unrealized Gains	1,659	1,306
Gross Unrealized Losses	520	859
Fair Value	33,378	32,570
OTTI in AOCI	7	10
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Fixed maturities available for sale, amortized cost	32,239	32,123
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	132	113
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	132	113
OTTI in AOCI	$ 0	$ 0