INVESTMENTS (AVAILABLE FOR SALE SECURITIES) (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 32,645	$ 32,236
Gross Unrealized Gains	1,399	1,306
Gross Unrealized Losses	773	859
Fair Value	33,271	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	1,564
Due in years two through five, Amortized Cost	7,954
Due in years six through ten, Amortized Cost	9,142
Due after ten years, Amortized Cost	12,614
Available for sale securities debt maturities single maturity date, Amortized Cost, Subtotal	31,274
Fixed maturities available for sale, amortized cost	32,471
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in one year or less, Fair Value	1,584
Due in years two through five, Fair Value	8,381
Due in years six through ten, Fair Value	9,280
Due after ten years, Fair Value	12,608
Available for sale securities debt maturities single maturity date, Fair Value, Subtotal	31,853
Available-for-sale securities, debt maturities, Fair Value, Total	33,096
Public corporate
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	12,699	12,418
Gross Unrealized Gains	690	675
Gross Unrealized Losses	72	81
Fair Value	13,317	13,012
OTTI in AOCI	0	0
Private corporate
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	7,147	6,880
Gross Unrealized Gains	278	215
Gross Unrealized Losses	54	55
Fair Value	7,371	7,040
OTTI in AOCI	0	0
U.S. Treasury, government and agency
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	10,675	10,739
Gross Unrealized Gains	237	221
Gross Unrealized Losses	582	624
Fair Value	10,330	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	63	63
Gross Unrealized Losses	2	2
Fair Value	480	493
OTTI in AOCI	0	0
Foreign Govts
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	334	375
Gross Unrealized Gains	29	29
Gross Unrealized Losses	8	14
Fair Value	355	390
OTTI in AOCI	0	0
Commercial Mortgage- backed
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	373	415
Gross Unrealized Gains	21	28
Gross Unrealized Losses	53	72
Fair Value	341	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	373
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, debt maturities, without single maturity date, Fair Value	341
Residential Mortgage- backed
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	279	294
Gross Unrealized Gains	18	20
Gross Unrealized Losses	0	0
Fair Value	297	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	279
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, debt maturities, without single maturity date, Fair Value	297
Asset- backed
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	43	51
Gross Unrealized Gains	15	10
Gross Unrealized Losses	1	1
Fair Value	57	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	43
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, debt maturities, without single maturity date, Fair Value	57
Redeemable Preferred Stock
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	502	519
Gross Unrealized Gains	47	45
Gross Unrealized Losses	1	10
Fair Value	548	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	502
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, debt maturities, without single maturity date, Fair Value	548
Fixed Maturities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	32,471	32,123
Gross Unrealized Gains	1,398	1,306
Gross Unrealized Losses	773	859
Fair Value	33,096	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	32,471	32,123
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	174	113
Gross Unrealized Gains	1	0
Gross Unrealized Losses	0	0
Fair Value	175	113
OTTI in AOCI	$ 0	$ 0