INVESTMENTS (MORTGAGE LOANS) (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
Jun. 30, 2017	Dec. 31, 2016
Commercial Mortgage Loans
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	$ 7,905	$ 7,264
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing receivables, recorded investment, past due	0	0
Financing receivables, recorded investment, current	7,905	7,264
Total financing receivables	7,905	7,264
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	0	15
Impaired financing receivable, unpaid principal balance	0	15
Related allowance	0	0
Impaired financing receivable, average recorded investment	0	22
Impaired financing receivable, interest income recognized	0	0
Commercial Mortgage Loans \| With Related Allowance Recorded
Impaired Mortgage Loans [Abstract]
Impaired financing receivable, recorded investment	27	27
Impaired financing receivable, unpaid principal balance	27	27
Related allowance	(8)	(8)
Impaired financing receivable, average recorded investment	27	48
Impaired financing receivable, interest income recognized	1	2
Commercial Mortgage Loans \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	4,907	4,237
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	4,907	4,237
Commercial Mortgage Loans \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	585	590
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	585	590
Commercial Mortgage Loans \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	1,299	989
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	1,299	989
Commercial Mortgage Loans \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	1,018	1,298
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	1,018	1,298
Commercial Mortgage Loans \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	96	104
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	96	104
Commercial Mortgage Loans \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	0	46
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	46
Commercial Mortgage Loans \| 0% - 50%
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	1,121	948
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	1,121	948
Commercial Mortgage Loans \| 0% - 50% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	681	738
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	681	738
Commercial Mortgage Loans \| 0% - 50% \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	45	95
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	45	95
Commercial Mortgage Loans \| 0% - 50% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	321	59
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	321	59
Commercial Mortgage Loans \| 0% - 50% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	74	56
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	74	56
Commercial Mortgage Loans \| 0% - 50% \| 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 \| 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	6,030	5,496
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	6,030	5,496
Commercial Mortgage Loans \| 50% - 70% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	3,977	3,217
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	3,977	3,217
Commercial Mortgage Loans \| 50% - 70% \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	518	430
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	518	430
Commercial Mortgage Loans \| 50% - 70% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	695	673
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	695	673
Commercial Mortgage Loans \| 50% - 70% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	840	1,100
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	840	1,100
Commercial Mortgage Loans \| 50% - 70% \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	0	76
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	76
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	727	777
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	727	777
Commercial Mortgage Loans \| 70% - 90% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	249	282
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	249	282
Commercial Mortgage Loans \| 70% - 90% \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	22	65
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	22	65
Commercial Mortgage Loans \| 70% - 90% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	256	229
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	256	229
Commercial Mortgage Loans \| 70% - 90% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	104	127
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	104	127
Commercial Mortgage Loans \| 70% - 90% \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	96	28
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	96	28
Commercial Mortgage Loans \| 70% - 90% \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	0	46
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	46
Commercial Mortgage Loans \| 90% plus
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	27	43
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	27	43
Commercial 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
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	28
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	27	28
Commercial Mortgage Loans \| 90% plus \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	0	15
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	15
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	0
Agricultural Mortgages [Member] \| With No Related Allowance Recorded
Impaired Mortgage Loans [Abstract]
Impaired financing receivable, recorded investment	0	0
Impaired financing receivable, unpaid principal balance	0	0
Related allowance	0	0
Impaired financing receivable, average recorded investment	0	0
Impaired financing receivable, interest income recognized	0	0
Agricultural Mortgages [Member] \| With Related Allowance Recorded
Impaired Mortgage Loans [Abstract]
Impaired financing receivable, recorded investment	0	0
Impaired financing receivable, unpaid principal balance	0	0
Related allowance	0	0
Impaired financing receivable, average recorded investment	0	0
Impaired financing receivable, interest income recognized	0	0
Agricultural Mortgage Loans
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	2,506	2,501
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing receivables, recorded investment, past due	62	17
Financing receivables, recorded investment, current	2,444	2,484
Total financing receivables	2,506	2,501
Financing receivable, recorded investment, 90 days or more past due and accruing	19	6
Agricultural Mortgage Loans \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	380	395
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	380	395
Agricultural Mortgage Loans \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	198	195
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	198	195
Agricultural Mortgage Loans \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	513	507
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	513	507
Agricultural Mortgage Loans \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	826	805
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	826	805
Agricultural Mortgage Loans \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	498	505
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	498	505
Agricultural Mortgage Loans \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	91	94
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	91	94
Agricultural Mortgage Loans \| 0% - 50%
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	1,537	1,491
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	1,537	1,491
Agricultural Mortgage Loans \| 0% - 50% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	255	254
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	255	254
Agricultural Mortgage Loans \| 0% - 50% \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	142	138
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	142	138
Agricultural Mortgage Loans \| 0% - 50% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	301	296
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	301	296
Agricultural Mortgage Loans \| 0% - 50% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	501	468
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	501	468
Agricultural Mortgage Loans \| 0% - 50% \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	285	286
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	285	286
Agricultural Mortgage Loans \| 0% - 50% \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	53	49
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	53	49
Agricultural Mortgage Loans \| 50% - 70%
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	965	1,004
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	965	1,004
Agricultural Mortgage Loans \| 50% - 70% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	125	141
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	125	141
Agricultural Mortgage Loans \| 50% - 70% \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	56	57
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	56	57
Agricultural Mortgage Loans \| 50% - 70% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	212	209
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	212	209
Agricultural Mortgage Loans \| 50% - 70% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	321	333
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	321	333
Agricultural Mortgage Loans \| 50% - 70% \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	213	219
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	213	219
Agricultural Mortgage Loans \| 50% - 70% \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	38	45
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	38	45
Agricultural Mortgage Loans \| 70% - 90%
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	4	6
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	4	6
Agricultural Mortgage Loans \| 70% - 90% \| 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 \| 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	0	2
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	0	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	37	9
Agricultural Mortgage Loans \| 60 to 89 Days
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing receivables, recorded investment, past due	6	2
Agricultural Mortgage Loans \| 90 Days or More
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing receivables, recorded investment, past due	19	6
Total Mortgages Loan
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	10,411	9,765
Financing Receivable, Recorded Investment, Aging [Abstract]
Financing receivables, recorded investment, past due	62	17
Financing receivables, recorded investment, current	10,349	9,748
Total financing receivables	10,411	9,765
Financing receivable, recorded investment, 90 days or more past due and accruing	19	6
Total Mortgages Loan \| With No Related Allowance Recorded
Impaired Mortgage Loans [Abstract]
Impaired financing receivable, recorded investment	0	15
Impaired financing receivable, unpaid principal balance	0	15
Related allowance	0	0
Impaired financing receivable, average recorded investment	0	22
Impaired financing receivable, interest income recognized	0	0
Total Mortgages Loan \| With Related Allowance Recorded
Impaired Mortgage Loans [Abstract]
Impaired financing receivable, recorded investment	27	27
Impaired financing receivable, unpaid principal balance	27	27
Related allowance	(8)	(8)
Impaired financing receivable, average recorded investment	27	48
Impaired financing receivable, interest income recognized	1	2
Total Mortgages Loan \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	5,287	4,632
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	5,287	4,632
Total Mortgages Loan \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	783	785
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	783	785
Total Mortgages Loan \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	1,812	1,496
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	1,812	1,496
Total Mortgages Loan \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	1,844	2,103
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	1,844	2,103
Total Mortgages Loan \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	594	609
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	594	609
Total Mortgages Loan \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	91	140
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	91	140
Total Mortgages Loan \| 0% - 50%
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	2,658	2,439
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	2,658	2,439
Total Mortgages Loan \| 0% - 50% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	936	992
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	936	992
Total Mortgages Loan \| 0% - 50% \| 1.8x to 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	187	233
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	187	233
Total Mortgages Loan \| 0% - 50% \| 1.5x to 1.8x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	622	355
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	622	355
Total Mortgages Loan \| 0% - 50% \| 1.2x to 1.5x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	575	524
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	575	524
Total Mortgages Loan \| 0% - 50% \| 1.0x to 1.2x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	285	286
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	285	286
Total Mortgages Loan \| 0% - 50% \| Less than 1.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	53	49
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	53	49
Total Mortgages Loan \| 50% - 70%
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	6,995	6,500
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	6,995	6,500
Total Mortgages Loan \| 50% - 70% \| Greater than 2.0x
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate	4,102	3,358
Financing Receivable, Recorded Investment, Aging [Abstract]
Total financing receivables	4,102	3,358

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

6 Months Ended

12 Months Ended

Jun. 30, 2017

Dec. 31, 2016

Commercial Mortgage Loans

Mortgage Loans on Real Estate [Line Items]

Mortgage loans on real estate

$ 7,905

$ 7,264

Financing Receivable, Recorded Investment, Aging [Abstract]

Financing receivables, recorded investment, past due