INVESTMENTS (MORTGAGE LOANS) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
Sep. 30, 2016	Dec. 31, 2015
Commercial Mortgage Loans
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	$ 6,307	$ 4,847
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing receivables, recorded investment, past due	0	30
Financing receivables, recorded investment, current	6,307	4,817
Total financing receivables	6,307	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	15	46
Impaired financing receivable, unpaid principal balance	15	46
Related allowance	0	0
Impaired financing receivable, average recorded investment	23	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	28	63
Impaired financing receivable, unpaid principal balance	28	63
Related allowance	(8)	(6)
Impaired financing receivable, average recorded investment	53	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	3,573	2,129
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	3,573	2,129
Commercial Mortgage Loans \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	723	353
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	723	353
Commercial Mortgage Loans \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	829	1,049
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	829	1,049
Commercial Mortgage Loans \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	1,032	1,045
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	1,032	1,045
Commercial Mortgage Loans \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	104	225
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	104	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	899	671
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	899	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	151	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	151	0
Commercial Mortgage Loans \| 0% - 50% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	46	102
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	46	102
Commercial Mortgage Loans \| 0% - 50% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	57	12
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	57	12
Commercial Mortgage Loans \| 0% - 50% \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	0	24
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	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	4,670	3,416
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	4,670	3,416
Commercial Mortgage Loans \| 50% - 70% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	2,644	1,392
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	2,644	1,392
Commercial Mortgage Loans \| 50% - 70% \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	508	353
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	508	353
Commercial Mortgage Loans \| 50% - 70% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	624	741
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	624	741
Commercial Mortgage Loans \| 50% - 70% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	818	853
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	818	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	663	651
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	663	651
Commercial Mortgage Loans \| 70% - 90% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	251	141
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	251	141
Commercial Mortgage Loans \| 70% - 90% \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	64	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	64	0
Commercial Mortgage Loans \| 70% - 90% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	132	206
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	132	206
Commercial Mortgage Loans \| 70% - 90% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	142	134
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	142	134
Commercial Mortgage Loans \| 70% - 90% \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	28	124
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	28	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	75	109
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	75	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	27	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	27	0
Commercial Mortgage Loans \| 90% plus \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	15	46
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	15	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	2,470	2,330
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing receivables, recorded investment, past due	36	23
Financing receivables, recorded investment, current	2,434	2,307
Total financing receivables	2,470	2,330
Financing receivable, recorded investment, 90 days or more past due and accruing	19	4
Agricultural Mortgage Loans \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	387	350
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	387	350
Agricultural Mortgage Loans \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	200	196
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	200	196
Agricultural Mortgage Loans \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	497	471
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	497	471
Agricultural Mortgage Loans \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	789	734
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	789	734
Agricultural Mortgage Loans \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	498	481
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	498	481
Agricultural Mortgage Loans \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	99	98
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	99	98
Agricultural Mortgage Loans \| 0% - 50%
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	1,451	1,336
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	1,451	1,336
Agricultural Mortgage Loans \| 0% - 50% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	254	204
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	254	204
Agricultural Mortgage Loans \| 0% - 50% \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	137	116
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	137	116
Agricultural Mortgage Loans \| 0% - 50% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	298	277
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	298	277
Agricultural Mortgage Loans \| 0% - 50% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	438	432
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	438	432
Agricultural Mortgage Loans \| 0% - 50% \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	275	256
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	275	256
Agricultural Mortgage Loans \| 0% - 50% \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	49	51
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	49	51
Agricultural Mortgage Loans \| 50% - 70%
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	1,010	988
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	1,010	988
Agricultural Mortgage Loans \| 50% - 70% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	130	146
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	130	146
Agricultural Mortgage Loans \| 50% - 70% \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	63	80
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	63	80
Agricultural Mortgage Loans \| 50% - 70% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	197	192
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	197	192
Agricultural Mortgage Loans \| 50% - 70% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	347	298
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	347	298
Agricultural Mortgage Loans \| 50% - 70% \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	223	225
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	223	225
Agricultural Mortgage Loans \| 50% - 70% \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	50	47
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	50	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	12	7
Agricultural Mortgage Loans \| 90 Days or More
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing receivables, recorded investment, past due	19	4
Total Mortgages Loan
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	8,777	7,177
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing receivables, recorded investment, past due	36	53
Financing receivables, recorded investment, current	8,741	7,124
Total financing receivables	8,777	7,177
Financing receivable, recorded investment, 90 days or more past due and accruing	19	4
Total Mortgages Loan \| With No Related Allowance Recorded
Impaired Mortgage Loans [Abstract]
Impaired financing receivable, recorded investment	15	46
Impaired financing receivable, unpaid principal balance	15	46
Related allowance	0	0
Impaired financing receivable, average recorded investment	23	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	28	63
Impaired financing receivable, unpaid principal balance	28	63
Related allowance	(8)	(6)
Impaired financing receivable, average recorded investment	53	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	3,960	2,479
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	3,960	2,479
Total Mortgages Loan \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	923	549
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	923	549
Total Mortgages Loan \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	1,326	1,520
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	1,326	1,520
Total Mortgages Loan \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	1,821	1,779
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	1,821	1,779
Total Mortgages Loan \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	602	706
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	602	706
Total Mortgages Loan \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	145	144
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	145	144
Total Mortgages Loan \| 0% - 50%
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	2,350	2,007
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	2,350	2,007
Total Mortgages Loan \| 0% - 50% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	899	737
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	899	737
Total Mortgages Loan \| 0% - 50% \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	288	116
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	288	116
Total Mortgages Loan \| 0% - 50% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	344	379
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	344	379
Total Mortgages Loan \| 0% - 50% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	495	444
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	495	444
Total Mortgages Loan \| 0% - 50% \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	275	280
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	275	280
Total Mortgages Loan \| 0% - 50% \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	49	51
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	49	51
Total Mortgages Loan \| 50% - 70%
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	5,680	4,404
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	5,680	4,404
Total Mortgages Loan \| 50% - 70% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	2,774	1,538
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	2,774	1,538
Total Mortgages Loan \| 50% - 70% \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	571	433
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	571	433
Total Mortgages Loan \| 50% - 70% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	821	933
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	821	933
Total Mortgages Loan \| 50% - 70% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	1,165	1,151
Financing Receivable, Recorded Investment, Aging [Abstract]

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

9 Months Ended

12 Months Ended

Sep. 30, 2016

Dec. 31, 2015

Commercial Mortgage Loans

Mortgage Loans on Real Estate [Line Items]

Mortgage loans on real estate

$ 6,307

$ 4,847

Financing Receivable, Recorded Investment, Aging [Abstract]

Financing receivables, recorded investment, past due