INVESTMENTS - Credit Quality (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Commercial Mortgage Loans
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	$ 1,615
2019	814
2018	1,267
2017	1,204
2016	2,563
Prior	3,028
Total Loans	10,491	$ 9,373
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	162	0
Current	10,329	9,373
Total	10,491	9,373
Non-accruing Loans	0	0
Total Loans	10,491	9,373
Non-accruing Loans with No Allowance	0	0
Interest Income on Non-accruing Loans	0	0
Commercial Mortgage Loans | 30-59 Days
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	162	0
Commercial Mortgage Loans | 60-89 Days
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Commercial Mortgage Loans | 90 Days Or Greater
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Commercial Mortgage Loans | Greater than 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	1,230
2019	492
2018	772
2017	268
2016	1,942
Prior	1,230
Total Loans	5,934	5,235
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	5,934	5,235
Commercial Mortgage Loans | 1.8x to 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	227
2019	83
2018	118
2017	378
2016	184
Prior	329
Total Loans	1,319	1,331
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	1,319	1,331
Commercial Mortgage Loans | 1.5x to 1.8x
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	98
2019	138
2018	187
2017	479
2016	437
Prior	616
Total Loans	1,955	1,546
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	1,955	1,546
Commercial Mortgage Loans | 1.2x to 1.5x
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	60
2019	57
2018	154
2017	79
2016	0
Prior	658
Total Loans	1,008	973
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	1,008	973
Commercial Mortgage Loans | 1.0x to 1.2x
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	0
2019	44
2018	0
2017	0
2016	0
Prior	123
Total Loans	167	288
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	167	288
Commercial Mortgage Loans | Less than 1.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	0
2019	0
2018	36
2017	0
2016	0
Prior	72
Total Loans	108	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	108	0
Commercial Mortgage Loans | 0% - 50%
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	0
2019	0
2018	0
2017	324
2016	170
Prior	505
Total Loans	999	1,163
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	999	1,163
Commercial Mortgage Loans | 0% - 50% | Greater than 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	839	887
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	839	887
Commercial Mortgage Loans | 0% - 50% | 1.8x to 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	38
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	38
Commercial Mortgage Loans | 0% - 50% | 1.5x to 1.8x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	160	214
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	160	214
Commercial Mortgage Loans | 0% - 50% | 1.2x to 1.5x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	24
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	24
Commercial Mortgage Loans | 0% - 50% | 1.0x to 1.2x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	0
Commercial Mortgage Loans | 0% - 50% | Less than 1.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	0
Commercial Mortgage Loans | 50% - 70%
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	1,294
2019	357
2018	803
2017	656
2016	2,190
Prior	1,697
Total Loans	6,997	7,447
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	6,997	7,447
Commercial Mortgage Loans | 50% - 70% | Greater than 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	4,095	4,097
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	4,095	4,097
Commercial Mortgage Loans | 50% - 70% | 1.8x to 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	870	1,195
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	870	1,195
Commercial Mortgage Loans | 50% - 70% | 1.5x to 1.8x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	1,452	1,118
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	1,452	1,118
Commercial Mortgage Loans | 50% - 70% | 1.2x to 1.5x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	555	795
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	555	795
Commercial Mortgage Loans | 50% - 70% | 1.0x to 1.2x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	25	242
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	25	242
Commercial Mortgage Loans | 50% - 70% | Less than 1.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	0
Commercial Mortgage Loans | 70% - 90%
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	321
2019	457
2018	452
2017	219
2016	203
Prior	538
Total Loans	2,190	763
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	2,190	763
Commercial Mortgage Loans | 70% - 90% | Greater than 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	844	251
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	844	251
Commercial Mortgage Loans | 70% - 90% | 1.8x to 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	449	98
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	449	98
Commercial Mortgage Loans | 70% - 90% | 1.5x to 1.8x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	343	214
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	343	214
Commercial Mortgage Loans | 70% - 90% | 1.2x to 1.5x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	376	154
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	376	154
Commercial Mortgage Loans | 70% - 90% | 1.0x to 1.2x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	142	46
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	142	46
Commercial Mortgage Loans | 70% - 90% | Less than 1.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	36	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	36	0
Commercial Mortgage Loans | 90% plus
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	0
2019	0
2018	12
2017	5
2016	0
Prior	288
Total Loans	305	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	305	0
Commercial Mortgage Loans | 90% plus | Greater than 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	156	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	156	0
Commercial Mortgage Loans | 90% plus | 1.8x to 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	0
Commercial Mortgage Loans | 90% plus | 1.5x to 1.8x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	0
Commercial Mortgage Loans | 90% plus | 1.2x to 1.5x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	77	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	77	0
Commercial Mortgage Loans | 90% plus | 1.0x to 1.2x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	0
Commercial Mortgage Loans | 90% plus | Less than 1.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	72	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	72	0
Agricultural Mortgage Loans
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	495
2019	264
2018	333
2017	259
2016	360
Prior	1,021
Total Loans	2,732	2,717
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	112	124
Current	2,620	2,593
Total	2,732	2,717
Non-accruing Loans	0	0
Total Loans	2,732	2,717
Non-accruing Loans with No Allowance	0	0
Interest Income on Non-accruing Loans	0	0
Agricultural Mortgage Loans | 30-59 Days
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	76	57
Agricultural Mortgage Loans | 60-89 Days
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	7	1
Agricultural Mortgage Loans | 90 Days Or Greater
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	29	66
Agricultural Mortgage Loans | Greater than 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	67
2019	26
2018	36
2017	38
2016	71
Prior	167
Total Loans	405	404
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	405	404
Agricultural Mortgage Loans | 1.8x to 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	38
2019	35
2018	14
2017	15
2016	20
Prior	82
Total Loans	204	191
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	204	191
Agricultural Mortgage Loans | 1.5x to 1.8x
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	117
2019	38
2018	41
2017	45
2016	52
Prior	209
Total Loans	502	477
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	502	477
Agricultural Mortgage Loans | 1.2x to 1.5x
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	183
2019	120
2018	141
2017	90
2016	142
Prior	313
Total Loans	989	990
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	989	990
Agricultural Mortgage Loans | 1.0x to 1.2x
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	86
2019	35
2018	93
2017	70
2016	57
Prior	233
Total Loans	574	572
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	574	572
Agricultural Mortgage Loans | Less than 1.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	4
2019	10
2018	8
2017	1
2016	18
Prior	17
Total Loans	58	83
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	58	83
Agricultural Mortgage Loans | 0% - 50%
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	218
2019	135
2018	169
2017	157
2016	236
Prior	652
Total Loans	1,567	1,583
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	1,567	1,583
Agricultural Mortgage Loans | 0% - 50% | Greater than 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	297	322
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	297	322
Agricultural Mortgage Loans | 0% - 50% | 1.8x to 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	108	104
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	108	104
Agricultural Mortgage Loans | 0% - 50% | 1.5x to 1.8x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	291	241
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	291	241
Agricultural Mortgage Loans | 0% - 50% | 1.2x to 1.5x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	520	545
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	520	545
Agricultural Mortgage Loans | 0% - 50% | 1.0x to 1.2x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	317	321
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	317	321
Agricultural Mortgage Loans | 0% - 50% | Less than 1.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	34	50
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	34	50
Agricultural Mortgage Loans | 50% - 70%
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	277
2019	129
2018	161
2017	102
2016	124
Prior	351
Total Loans	1,144	1,115
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	1,144	1,115
Agricultural Mortgage Loans | 50% - 70% | Greater than 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	108	82
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	108	82
Agricultural Mortgage Loans | 50% - 70% | 1.8x to 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	94	87
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	94	87
Agricultural Mortgage Loans | 50% - 70% | 1.5x to 1.8x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	211	236
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	211	236
Agricultural Mortgage Loans | 50% - 70% | 1.2x to 1.5x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	450	426
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	450	426
Agricultural Mortgage Loans | 50% - 70% | 1.0x to 1.2x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	257	251
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	257	251
Agricultural Mortgage Loans | 50% - 70% | Less than 1.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	24	33
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	24	33
Agricultural Mortgage Loans | 70% - 90%
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	0
2019	0
2018	3
2017	0
2016	0
Prior	18
Total Loans	21	19
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	21	19
Agricultural Mortgage Loans | 70% - 90% | Greater than 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	0
Agricultural Mortgage Loans | 70% - 90% | 1.8x to 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	2	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	2	0
Agricultural Mortgage Loans | 70% - 90% | 1.5x to 1.8x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	0
Agricultural Mortgage Loans | 70% - 90% | 1.2x to 1.5x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	19	19
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	19	19
Agricultural Mortgage Loans | 70% - 90% | 1.0x to 1.2x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	0
Agricultural Mortgage Loans | 70% - 90% | Less than 1.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	0
Agricultural Mortgage Loans | 90% plus
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Total Loans	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	0
Agricultural Mortgage Loans | 90% plus | Greater than 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	0
Agricultural Mortgage Loans | 90% plus | 1.8x to 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	0
Agricultural Mortgage Loans | 90% plus | 1.5x to 1.8x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	0
Agricultural Mortgage Loans | 90% plus | 1.2x to 1.5x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	0
Agricultural Mortgage Loans | 90% plus | 1.0x to 1.2x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	0
Agricultural Mortgage Loans | 90% plus | Less than 1.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	0
Mortgages Loan
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	2,110
2019	1,078
2018	1,600
2017	1,463
2016	2,923
Prior	4,049
Total Loans	13,223	12,090
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	274	124
Current	12,949	11,966
Total	13,223	12,090
Non-accruing Loans	0	0
Total Loans	13,223	12,090
Non-accruing Loans with No Allowance	0	0
Interest Income on Non-accruing Loans	0	0
Mortgages Loan | 30-59 Days
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	238	57
Mortgages Loan | 60-89 Days
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	7	1
Mortgages Loan | 90 Days Or Greater
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	29	66
Mortgages Loan | Greater than 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	1,297
2019	518
2018	808
2017	306
2016	2,013
Prior	1,397
Total Loans	6,339	5,639
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	6,339	5,639
Mortgages Loan | 1.8x to 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	265
2019	118
2018	132
2017	393
2016	204
Prior	411
Total Loans	1,523	1,522
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	1,523	1,522
Mortgages Loan | 1.5x to 1.8x
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	215
2019	176
2018	228
2017	524
2016	489
Prior	825
Total Loans	2,457	2,023
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	2,457	2,023
Mortgages Loan | 1.2x to 1.5x
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	243
2019	177
2018	295
2017	169
2016	142
Prior	971
Total Loans	1,997	1,963
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	1,997	1,963
Mortgages Loan | 1.0x to 1.2x
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	86
2019	79
2018	93
2017	70
2016	57
Prior	356
Total Loans	741	860
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	741	860
Mortgages Loan | Less than 1.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	4
2019	10
2018	44
2017	1
2016	18
Prior	89
Total Loans	166	83
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	166	83
Mortgages Loan | 0% - 50%
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	218
2019	135
2018	169
2017	481
2016	406
Prior	1,157
Total Loans	2,566	2,746
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	2,566	2,746
Mortgages Loan | 0% - 50% | Greater than 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	1,136	1,209
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	1,136	1,209
Mortgages Loan | 0% - 50% | 1.8x to 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	108	142
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	108	142
Mortgages Loan | 0% - 50% | 1.5x to 1.8x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	451	455
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	451	455
Mortgages Loan | 0% - 50% | 1.2x to 1.5x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	520	569
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	520	569
Mortgages Loan | 0% - 50% | 1.0x to 1.2x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	317	321
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	317	321
Mortgages Loan | 0% - 50% | Less than 1.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	34	50
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	34	50
Mortgages Loan | 50% - 70%
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	1,571
2019	486
2018	964
2017	758
2016	2,314
Prior	2,048
Total Loans	8,141	8,562
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	8,141	8,562
Mortgages Loan | 50% - 70% | Greater than 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	4,203	4,179
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	4,203	4,179
Mortgages Loan | 50% - 70% | 1.8x to 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	964	1,282
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	964	1,282
Mortgages Loan | 50% - 70% | 1.5x to 1.8x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	1,663	1,354
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	1,663	1,354
Mortgages Loan | 50% - 70% | 1.2x to 1.5x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	1,005	1,221
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	1,005	1,221
Mortgages Loan | 50% - 70% | 1.0x to 1.2x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	282	493
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	282	493
Mortgages Loan | 50% - 70% | Less than 1.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	24	33
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	24	33
Mortgages Loan | 70% - 90%
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	321
2019	457
2018	455
2017	219
2016	203
Prior	556
Total Loans	2,211	782
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	2,211	782
Mortgages Loan | 70% - 90% | Greater than 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	844	251
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	844	251
Mortgages Loan | 70% - 90% | 1.8x to 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	451	98
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	451	98
Mortgages Loan | 70% - 90% | 1.5x to 1.8x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	343	214
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	343	214
Mortgages Loan | 70% - 90% | 1.2x to 1.5x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	395	173
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	395	173
Mortgages Loan | 70% - 90% | 1.0x to 1.2x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	142	46
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	142	46
Mortgages Loan | 70% - 90% | Less than 1.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	36	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	36	0
Mortgages Loan | 90% plus
Financing Receivable, before Allowance for Credit Loss [Abstract]
2020	0
2019	0
2018	12
2017	5
2016	0
Prior	288
Total Loans	305	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	305	0
Mortgages Loan | 90% plus | Greater than 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	156	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	156	0
Mortgages Loan | 90% plus | 1.8x to 2.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	0
Mortgages Loan | 90% plus | 1.5x to 1.8x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	0
Mortgages Loan | 90% plus | 1.2x to 1.5x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	77	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	77	0
Mortgages Loan | 90% plus | 1.0x to 1.2x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	0	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	0	0
Mortgages Loan | 90% plus | Less than 1.0x
Financing Receivable, before Allowance for Credit Loss [Abstract]
Total Loans	72	0
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Loans	$ 72	$ 0