INVESTMENTS (MORTGAGE LOANS) (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
Jun. 30, 2016	Dec. 31, 2015
Commercial Mortgage Loans
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	$ 6,038	$ 4,847
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing receivables, recorded investment, past due	0	30
Financing receivables, recorded investment, current	6,038	4,817
Total financing receivables	6,038	4,847
Financing receivable, recorded investment, 90 days or more past due and accruing	0	0
Commercial Mortgage Loans \| With No Related Allowance Recorded
Impaired Mortgage Loans [Abstract]
Impaired financing receivable, recorded investment	16	46
Impaired financing receivable, unpaid principal balance	16	46
Related allowance	0	0
Impaired financing receivable, average recorded investment	26	15
Impaired financing receivable, interest income recognized	0	0
Commercial Mortgage Loans \| With Related Allowance Recorded
Impaired Mortgage Loans [Abstract]
Impaired financing receivable, recorded investment	61	63
Impaired financing receivable, unpaid principal balance	61	63
Related allowance	(7)	(6)
Impaired financing receivable, average recorded investment	62	137
Impaired financing receivable, interest income recognized	2	4
Commercial Mortgage Loans \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	3,092	2,129
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	3,092	2,129
Commercial Mortgage Loans \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	529	353
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	529	353
Commercial Mortgage Loans \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	989	1,049
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	989	1,049
Commercial Mortgage Loans \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	1,194	1,045
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	1,194	1,045
Commercial Mortgage Loans \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	188	225
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	188	225
Commercial Mortgage Loans \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	46	46
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	46	46
Commercial Mortgage Loans \| 0% - 50%
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	897	671
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	897	671
Commercial Mortgage Loans \| 0% - 50% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	645	533
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	645	533
Commercial Mortgage Loans \| 0% - 50% \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	138	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	138	0
Commercial Mortgage Loans \| 0% - 50% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	57	102
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	57	102
Commercial Mortgage Loans \| 0% - 50% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	33	12
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	33	12
Commercial Mortgage Loans \| 0% - 50% \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	24	24
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	24	24
Commercial Mortgage Loans \| 0% - 50% \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	0
Commercial Mortgage Loans \| 50% - 70%
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	4,319	3,416
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	4,319	3,416
Commercial Mortgage Loans \| 50% - 70% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	2,273	1,392
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	2,273	1,392
Commercial Mortgage Loans \| 50% - 70% \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	330	353
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	330	353
Commercial Mortgage Loans \| 50% - 70% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	627	741
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	627	741
Commercial Mortgage Loans \| 50% - 70% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	1,013	853
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	1,013	853
Commercial Mortgage Loans \| 50% - 70% \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	76	77
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	76	77
Commercial Mortgage Loans \| 50% - 70% \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	0
Commercial Mortgage Loans \| 70% - 90%
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	745	651
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	745	651
Commercial Mortgage Loans \| 70% - 90% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	141	141
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	141	141
Commercial Mortgage Loans \| 70% - 90% \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	61	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	61	0
Commercial Mortgage Loans \| 70% - 90% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	277	206
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	277	206
Commercial Mortgage Loans \| 70% - 90% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	132	134
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	132	134
Commercial Mortgage Loans \| 70% - 90% \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	88	124
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	88	124
Commercial Mortgage Loans \| 70% - 90% \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	46	46
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	46	46
Commercial Mortgage Loans \| 90% plus
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	77	109
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	77	109
Commercial Mortgage Loans \| 90% plus \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	33	63
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	33	63
Commercial Mortgage Loans \| 90% plus \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	0
Commercial Mortgage Loans \| 90% plus \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	28	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	28	0
Commercial Mortgage Loans \| 90% plus \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	16	46
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	16	46
Commercial Mortgage Loans \| 90% plus \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	0
Commercial Mortgage Loans \| 90% plus \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	0
Commercial Mortgage Loans \| 30 to 59 Days
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing receivables, recorded investment, past due	0	0
Commercial Mortgage Loans \| 60 to 89 Days
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing receivables, recorded investment, past due	0	0
Commercial Mortgage Loans \| 90 Days or More
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing receivables, recorded investment, past due	0	30
Agricultural Mortgage Loans
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	2,424	2,330
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing receivables, recorded investment, past due	30	23
Financing receivables, recorded investment, current	2,394	2,307
Total financing receivables	2,424	2,330
Financing receivable, recorded investment, 90 days or more past due and accruing	18	4
Agricultural Mortgage Loans \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	385	350
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	385	350
Agricultural Mortgage Loans \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	203	196
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	203	196
Agricultural Mortgage Loans \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	478	471
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	478	471
Agricultural Mortgage Loans \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	767	734
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	767	734
Agricultural Mortgage Loans \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	503	481
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	503	481
Agricultural Mortgage Loans \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	88	98
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	88	98
Agricultural Mortgage Loans \| 0% - 50%
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	1,432	1,336
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	1,432	1,336
Agricultural Mortgage Loans \| 0% - 50% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	246	204
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	246	204
Agricultural Mortgage Loans \| 0% - 50% \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	133	116
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	133	116
Agricultural Mortgage Loans \| 0% - 50% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	288	277
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	288	277
Agricultural Mortgage Loans \| 0% - 50% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	446	432
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	446	432
Agricultural Mortgage Loans \| 0% - 50% \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	272	256
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	272	256
Agricultural Mortgage Loans \| 0% - 50% \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	47	51
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	47	51
Agricultural Mortgage Loans \| 50% - 70%
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	983	988
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	983	988
Agricultural Mortgage Loans \| 50% - 70% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	136	146
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	136	146
Agricultural Mortgage Loans \| 50% - 70% \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	70	80
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	70	80
Agricultural Mortgage Loans \| 50% - 70% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	188	192
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	188	192
Agricultural Mortgage Loans \| 50% - 70% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	317	298
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	317	298
Agricultural Mortgage Loans \| 50% - 70% \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	231	225
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	231	225
Agricultural Mortgage Loans \| 50% - 70% \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	41	47
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	41	47
Agricultural Mortgage Loans \| 70% - 90%
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	9	6
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	9	6
Agricultural Mortgage Loans \| 70% - 90% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	3	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	3	0
Agricultural Mortgage Loans \| 70% - 90% \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	0
Agricultural Mortgage Loans \| 70% - 90% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	2	2
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	2	2
Agricultural Mortgage Loans \| 70% - 90% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	4	4
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	4	4
Agricultural Mortgage Loans \| 70% - 90% \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	0
Agricultural Mortgage Loans \| 70% - 90% \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	0
Agricultural Mortgage Loans \| 90% plus
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	0
Agricultural Mortgage Loans \| 90% plus \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	0
Agricultural Mortgage Loans \| 90% plus \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	0
Agricultural Mortgage Loans \| 90% plus \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	0
Agricultural Mortgage Loans \| 90% plus \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	0
Agricultural Mortgage Loans \| 90% plus \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	0
Agricultural Mortgage Loans \| 90% plus \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	0
Agricultural Mortgage Loans \| 30 to 59 Days
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing receivables, recorded investment, past due	5	12
Agricultural Mortgage Loans \| 60 to 89 Days
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing receivables, recorded investment, past due	7	7
Agricultural Mortgage Loans \| 90 Days or More
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing receivables, recorded investment, past due	18	4
Total Mortgages Loan
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	8,462	7,177
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing receivables, recorded investment, past due	30	53
Financing receivables, recorded investment, current	8,432	7,124
Total financing receivables	8,462	7,177
Financing receivable, recorded investment, 90 days or more past due and accruing	18	4
Total Mortgages Loan \| With No Related Allowance Recorded
Impaired Mortgage Loans [Abstract]
Impaired financing receivable, recorded investment	16	46
Impaired financing receivable, unpaid principal balance	16	46
Related allowance	0	0
Impaired financing receivable, average recorded investment	26	15
Impaired financing receivable, interest income recognized	0	0
Total Mortgages Loan \| With Related Allowance Recorded
Impaired Mortgage Loans [Abstract]
Impaired financing receivable, recorded investment	61	63
Impaired financing receivable, unpaid principal balance	61	63
Related allowance	(7)	(6)
Impaired financing receivable, average recorded investment	62	137
Impaired financing receivable, interest income recognized	2	4
Total Mortgages Loan \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	3,477	2,479
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	3,477	2,479
Total Mortgages Loan \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	732	549
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	732	549
Total Mortgages Loan \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	1,467	1,520
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	1,467	1,520
Total Mortgages Loan \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	1,961	1,779
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	1,961	1,779
Total Mortgages Loan \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	691	706
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	691	706
Total Mortgages Loan \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	134	144
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	134	144
Total Mortgages Loan \| 0% - 50%
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	2,329	2,007
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	2,329	2,007
Total Mortgages Loan \| 0% - 50% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	891	737
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	891	737
Total Mortgages Loan \| 0% - 50% \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	271	116
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	271	116
Total Mortgages Loan \| 0% - 50% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	345	379
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	345	379
Total Mortgages Loan \| 0% - 50% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	479	444
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	479	444
Total Mortgages Loan \| 0% - 50% \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	296	280
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	296	280
Total Mortgages Loan \| 0% - 50% \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	47	51
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	47	51
Total Mortgages Loan \| 50% - 70%
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	5,302	4,404
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	5,302	4,404
Total Mortgages Loan \| 50% - 70% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	2,409	1,538
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	2,409	1,538
Total Mortgages Loan \| 50% - 70% \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	400	433
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	400	433
Total Mortgages Loan \| 50% - 70% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	815	933
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	815	933
Total Mortgages Loan \| 50% - 70% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	1,330	1,151
Financing Receivable, Recorded Investment, Aging [Abstract]

INVESTMENTS (MORTGAGE LOANS) (Details) - USD ($)
$ in Millions

6 Months Ended

12 Months Ended

Jun. 30, 2016

Dec. 31, 2015

Commercial Mortgage Loans

Mortgage Loans on Real Estate [Line Items]

Mortgage loans on real estate

$ 6,038

$ 4,847

Financing Receivable, Recorded Investment, Aging [Abstract]

Financing receivables, recorded investment, past due