CREDIT QUALITY AND THE ALLOWANCE FOR CREDIT LOSSES - Amortized Cost Basis by Credit Quality Indicator (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total	$ 149,746		$ 149,746		$ 156,662
Gross charge-offs
Total	191	$ 116	551	$ 308
Commercial
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	3,981		3,981		14,715
Year two	14,179		14,179		15,843
Year three	13,558		13,558		6,633
Year four	5,495		5,495		6,280
Year five	4,923		4,923		4,245
Prior to year five	8,906		8,906		7,076
Within the Revolving Period	26,340		26,340		27,221
Converted to Term	75		75		167
Total	77,457		77,457		82,180
Gross charge-offs
Year one			0
Year two			1
Year three			32
Year four			55
Year five			12
Prior to year five			77
Within the Revolving Period			35
Converted to Term			0
Total	74	22	212	49
Commercial | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	3,972		3,972		14,334
Year two	12,677		12,677		15,274
Year three	12,045		12,045		6,113
Year four	4,484		4,484		5,239
Year five	3,613		3,613		3,607
Prior to year five	6,874		6,874		5,833
Within the Revolving Period	24,762		24,762		26,099
Converted to Term	61		61		151
Total	68,488		68,488		76,650
Commercial | Special Mention
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	6		6		129
Year two	840		840		313
Year three	977		977		225
Year four	240		240		470
Year five	574		574		148
Prior to year five	449		449		269
Within the Revolving Period	636		636		426
Converted to Term	0		0		0
Total	3,722		3,722		1,980
Commercial | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	3		3		242
Year two	544		544		240
Year three	490		490		285
Year four	753		753		511
Year five	585		585		449
Prior to year five	1,264		1,264		959
Within the Revolving Period	883		883		620
Converted to Term	10		10		14
Total	4,532		4,532		3,320
Commercial | Doubtful
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	0		0		10
Year two	118		118		16
Year three	46		46		10
Year four	18		18		60
Year five	151		151		41
Prior to year five	319		319		15
Within the Revolving Period	59		59		76
Converted to Term	4		4		2
Total	715		715		230
Commercial | Commercial and industrial
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	2,545		2,545		8,588
Year two	7,462		7,462		8,890
Year three	6,366		6,366		2,548
Year four	1,756		1,756		2,408
Year five	1,432		1,432		1,522
Prior to year five	2,847		2,847		2,468
Within the Revolving Period	24,279		24,279		25,248
Converted to Term	66		66		164
Total	46,753		46,753		51,836
Gross charge-offs
Year one			0
Year two			1
Year three			32
Year four			4
Year five			1
Prior to year five			24
Within the Revolving Period			35
Converted to Term			0
Total			97
Commercial | Commercial and industrial | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	2,539		2,539		8,304
Year two	6,979		6,979		8,469
Year three	5,557		5,557		2,224
Year four	1,459		1,459		2,074
Year five	1,244		1,244		1,334
Prior to year five	2,217		2,217		1,952
Within the Revolving Period	22,929		22,929		24,211
Converted to Term	52		52		148
Total	42,976		42,976		48,716
Commercial | Commercial and industrial | Special Mention
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	6		6		124
Year two	172		172		189
Year three	448		448		120
Year four	81		81		74
Year five	72		72		48
Prior to year five	214		214		153
Within the Revolving Period	552		552		364
Converted to Term	0		0		0
Total	1,545		1,545		1,072
Commercial | Commercial and industrial | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	0		0		150
Year two	285		285		218
Year three	320		320		203
Year four	207		207		255
Year five	112		112		99
Prior to year five	314		314		349
Within the Revolving Period	742		742		597
Converted to Term	10		10		14
Total	1,990		1,990		1,885
Commercial | Commercial and industrial | Doubtful
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	0		0		10
Year two	26		26		14
Year three	41		41		1
Year four	9		9		5
Year five	4		4		41
Prior to year five	102		102		14
Within the Revolving Period	56		56		76
Converted to Term	4		4		2
Total	242		242		163
Commercial | Commercial real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	1,366		1,366		5,860
Year two	6,492		6,492		6,581
Year three	6,880		6,880		3,830
Year four	3,530		3,530		3,764
Year five	3,415		3,415		2,594
Prior to year five	5,733		5,733		4,260
Within the Revolving Period	2,061		2,061		1,973
Converted to Term	9		9		3
Total	29,486		29,486		28,865
Gross charge-offs
Year one			0
Year two			0
Year three			0
Year four			51
Year five			11
Prior to year five			53
Within the Revolving Period			0
Converted to Term			0
Total			115
Commercial | Commercial real estate | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	1,366		1,366		5,767
Year two	5,516		5,516		6,442
Year three	6,193		6,193		3,639
Year four	2,823		2,823		3,066
Year five	2,300		2,300		2,145
Prior to year five	4,334		4,334		3,536
Within the Revolving Period	1,833		1,833		1,888
Converted to Term	9		9		3
Total	24,374		24,374		26,486
Commercial | Commercial real estate | Special Mention
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	0		0		1
Year two	640		640		119
Year three	528		528		103
Year four	158		158		390
Year five	500		500		99
Prior to year five	235		235		113
Within the Revolving Period	84		84		62
Converted to Term	0		0		0
Total	2,145		2,145		887
Commercial | Commercial real estate | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	0		0		92
Year two	244		244		18
Year three	157		157		79
Year four	540		540		253
Year five	468		468		350
Prior to year five	947		947		610
Within the Revolving Period	141		141		23
Converted to Term	0		0		0
Total	2,497		2,497		1,425
Commercial | Commercial real estate | Doubtful
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	0		0		0
Year two	92		92		2
Year three	2		2		9
Year four	9		9		55
Year five	147		147		0
Prior to year five	217		217		1
Within the Revolving Period	3		3		0
Converted to Term	0		0		0
Total	470		470		67
Commercial | Leases
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	70		70		267
Year two	225		225		372
Year three	312		312		255
Year four	209		209		108
Year five	76		76		129
Prior to year five	326		326		348
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	1,218		1,218		1,479
Gross charge-offs
Year one			0
Year two			0
Year three			0
Year four			0
Year five			0
Prior to year five			0
Within the Revolving Period			0
Converted to Term			0
Total			0
Commercial | Leases | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	67		67		263
Year two	182		182		363
Year three	295		295		250
Year four	202		202		99
Year five	69		69		128
Prior to year five	323		323		345
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	1,138		1,138		1,448
Commercial | Leases | Special Mention
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	0		0		4
Year two	28		28		5
Year three	1		1		2
Year four	1		1		6
Year five	2		2		1
Prior to year five	0		0		3
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	32		32		21
Commercial | Leases | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	3		3		0
Year two	15		15		4
Year three	13		13		3
Year four	6		6		3
Year five	5		5		0
Prior to year five	3		3		0
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	45		45		10
Commercial | Leases | Doubtful
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	0		0		0
Year two	0		0		0
Year three	3		3		0
Year four	0		0		0
Year five	0		0		0
Prior to year five	0		0		0
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	3		3		0
Retail
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	3,748		3,748		11,158
Year two	10,592		10,592		18,251
Year three	16,116		16,116		11,083
Year four	9,578		9,578		5,223
Year five	4,334		4,334		2,457
Prior to year five	10,120		10,120		9,401
Within the Revolving Period	16,755		16,755		15,803
Converted to Term	1,046		1,046		1,106
Total	72,289		72,289		74,482
Gross charge-offs
Year one			36
Year two			49
Year three			50
Year four			33
Year five			28
Prior to year five			53
Within the Revolving Period			90
Converted to Term			0
Total	117	$ 94	339	$ 259
Retail | Residential mortgages
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	1,927		1,927		5,421
Year two	5,801		5,801		9,071
Year three	8,852		8,852		5,519
Year four	5,251		5,251		2,432
Year five	2,313		2,313		1,017
Prior to year five	6,839		6,839		6,461
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	30,983		30,983		29,921
Gross charge-offs
Year one			0
Year two			0
Year three			0
Year four			0
Year five			1
Prior to year five			2
Within the Revolving Period			0
Converted to Term			0
Total			3
Retail | Home equity
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	0		0		7
Year two	8		8		9
Year three	9		9		8
Year four	9		9		36
Year five	32		32		57
Prior to year five	450		450		496
Within the Revolving Period	13,183		13,183		12,340
Converted to Term	1,038		1,038		1,090
Total	14,729		14,729		14,043
Gross charge-offs
Year one			0
Year two			0
Year three			0
Year four			0
Year five			0
Prior to year five			2
Within the Revolving Period			6
Converted to Term			0
Total			8
Retail | Automobile
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	541		541		3,276
Year two	2,554		2,554		5,141
Year three	3,828		3,828		2,028
Year four	1,389		1,389		1,160
Year five	700		700		474
Prior to year five	278		278		213
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	9,290		9,290		12,292
Gross charge-offs
Year one			0
Year two			24
Year three			31
Year four			11
Year five			9
Prior to year five			7
Within the Revolving Period			0
Converted to Term			0
Total			82
Retail | Education
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	723		723		1,712
Year two	1,779		1,779		3,586
Year three	3,220		3,220		3,131
Year four	2,731		2,731		1,400
Year five	1,200		1,200		820
Prior to year five	2,481		2,481		2,159
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	12,134		12,134		12,808
Gross charge-offs
Year one			0
Year two			3
Year three			12
Year four			16
Year five			10
Prior to year five			35
Within the Revolving Period			0
Converted to Term			0
Total			76
Retail | Other retail
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	557		557		742
Year two	450		450		444
Year three	207		207		397
Year four	198		198		195
Year five	89		89		89
Prior to year five	72		72		72
Within the Revolving Period	3,572		3,572		3,463
Converted to Term	8		8		16
Total	5,153		5,153		5,418
Gross charge-offs
Year one			36
Year two			22
Year three			7
Year four			6
Year five			8
Prior to year five			7
Within the Revolving Period			84
Converted to Term			0
Total			170
Greater than 800 | Retail
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	1,084		1,084		3,516
Year two	4,355		4,355		8,226
Year three	8,055		8,055		5,389
Year four	5,043		5,043		2,251
Year five	1,991		1,991		924
Prior to year five	4,667		4,667		4,340
Within the Revolving Period	5,584		5,584		5,449
Converted to Term	236		236		267
Total	31,015		31,015		30,362
Greater than 800 | Retail | Residential mortgages
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	620		620		2,132
Year two	2,988		2,988		4,943
Year three	5,167		5,167		3,143
Year four	3,115		3,115		1,180
Year five	1,141		1,141		363
Prior to year five	3,233		3,233		3,081
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	16,264		16,264		14,842
Greater than 800 | Retail | Home equity
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	0		0		4
Year two	4		4		5
Year three	4		4		2
Year four	2		2		5
Year five	5		5		6
Prior to year five	95		95		110
Within the Revolving Period	5,084		5,084		4,958
Converted to Term	236		236		267
Total	5,430		5,430		5,357
Greater than 800 | Retail | Automobile
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	85		85		650
Year two	573		573		1,453
Year three	1,165		1,165		584
Year four	421		421		324
Year five	198		198		120
Prior to year five	68		68		54
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	2,510		2,510		3,185
Greater than 800 | Retail | Education
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	254		254		548
Year two	674		674		1,720
Year three	1,670		1,670		1,567
Year four	1,460		1,460		694
Year five	625		625		410
Prior to year five	1,247		1,247		1,068
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	5,930		5,930		6,007
Greater than 800 | Retail | Other retail
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	125		125		182
Year two	116		116		105
Year three	49		49		93
Year four	45		45		48
Year five	22		22		25
Prior to year five	24		24		27
Within the Revolving Period	500		500		491
Converted to Term	0		0		0
Total	881		881		971
740-799 | Retail
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	1,606		1,606		4,305
Year two	3,580		3,580		6,084
Year three	4,978		4,978		3,557
Year four	2,889		2,889		1,539
Year five	1,243		1,243		695
Prior to year five	2,604		2,604		2,422
Within the Revolving Period	5,537		5,537		5,324
Converted to Term	250		250		275
Total	22,687		22,687		24,201
740-799 | Retail | Residential mortgages
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	987		987		2,376
Year two	1,990		1,990		2,991
Year three	2,645		2,645		1,660
Year four	1,487		1,487		638
Year five	618		618		257
Prior to year five	1,699		1,699		1,635
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	9,426		9,426		9,557
740-799 | Retail | Home equity
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	0		0		2
Year two	2		2		2
Year three	2		2		1
Year four	1		1		4
Year five	4		4		6
Prior to year five	89		89		97
Within the Revolving Period	4,539		4,539		4,350
Converted to Term	249		249		274
Total	4,886		4,886		4,736
740-799 | Retail | Automobile
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	146		146		962
Year two	740		740		1,606
Year three	1,164		1,164		649
Year four	433		433		343
Year five	203		203		134
Prior to year five	74		74		56
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	2,760		2,760		3,750
740-799 | Retail | Education
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	304		304		735
Year two	717		717		1,351
Year three	1,108		1,108		1,126
Year four	908		908		486
Year five	389		389		267
Prior to year five	717		717		609
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	4,143		4,143		4,574
740-799 | Retail | Other retail
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	169		169		230
Year two	131		131		134
Year three	59		59		121
Year four	60		60		68
Year five	29		29		31
Prior to year five	25		25		25
Within the Revolving Period	998		998		974
Converted to Term	1		1		1
Total	1,472		1,472		1,584
680-739 | Retail
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	704		704		2,228
Year two	1,708		1,708		2,619
Year three	1,980		1,980		1,422
Year four	1,087		1,087		790
Year five	588		588		386
Prior to year five	1,339		1,339		1,311
Within the Revolving Period	3,589		3,589		3,289
Converted to Term	209		209		238
Total	11,204		11,204		12,283
680-739 | Retail | Residential mortgages
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	272		272		769
Year two	652		652		899
Year three	771		771		502
Year four	458		458		308
Year five	277		277		149
Prior to year five	855		855		851
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	3,285		3,285		3,478
680-739 | Retail | Home equity
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	0		0		1
Year two	0		0		1
Year three	1		1		1
Year four	2		2		6
Year five	4		4		11
Prior to year five	98		98		114
Within the Revolving Period	2,569		2,569		2,296
Converted to Term	207		207		234
Total	2,881		2,881		2,664
680-739 | Retail | Automobile
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	163		163		920
Year two	647		647		1,187
Year three	808		808		460
Year four	295		295		254
Year five	145		145		102
Prior to year five	57		57		44
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	2,115		2,115		2,967
680-739 | Retail | Education
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	123		123		363
Year two	308		308		423
Year three	350		350		356
Year four	282		282		170
Year five	137		137		103
Prior to year five	314		314		288
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	1,514		1,514		1,703
680-739 | Retail | Other retail
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	146		146		175
Year two	101		101		109
Year three	50		50		103
Year four	50		50		52
Year five	25		25		21
Prior to year five	15		15		14
Within the Revolving Period	1,020		1,020		993
Converted to Term	2		2		4
Total	1,409		1,409		1,471
620-679 | Retail
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	254		254		841
Year two	621		621		896
Year three	651		651		456
Year four	310		310		336
Year five	237		237		214
Prior to year five	695		695		649
Within the Revolving Period	1,129		1,129		993
Converted to Term	136		136		147
Total	4,033		4,033		4,532
620-679 | Retail | Residential mortgages
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	44		44		125
Year two	133		133		168
Year three	164		164		135
Year four	96		96		138
Year five	108		108		99
Prior to year five	459		459		422
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	1,004		1,004		1,087
620-679 | Retail | Home equity
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	0		0		0
Year two	1		1		1
Year three	1		1		2
Year four	2		2		9
Year five	9		9		16
Prior to year five	83		83		93
Within the Revolving Period	688		688		558
Converted to Term	134		134		143
Total	918		918		822
620-679 | Retail | Automobile
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	107		107		554
Year two	362		362		586
Year three	389		389		205
Year four	130		130		133
Year five	78		78		62
Prior to year five	37		37		28
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	1,103		1,103		1,568
620-679 | Retail | Education
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	21		21		54
Year two	64		64		76
Year three	68		68		62
Year four	57		57		38
Year five	34		34		29
Prior to year five	111		111		102
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	355		355		361
620-679 | Retail | Other retail
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	82		82		108
Year two	61		61		65
Year three	29		29		52
Year four	25		25		18
Year five	8		8		8
Prior to year five	5		5		4
Within the Revolving Period	441		441		435
Converted to Term	2		2		4
Total	653		653		694
Less than 620 | Retail
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	62		62		246
Year two	325		325		423
Year three	450		450		254
Year four	246		246		304
Year five	272		272		236
Prior to year five	763		763		620
Within the Revolving Period	549		549		368
Converted to Term	215		215		178
Total	2,882		2,882		2,629
Less than 620 | Retail | Residential mortgages
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	4		4		17
Year two	38		38		68
Year three	103		103		77
Year four	94		94		165
Year five	166		166		147
Prior to year five	578		578		455
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	983		983		929
Less than 620 | Retail | Home equity
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	0		0		0
Year two	1		1		0
Year three	1		1		2
Year four	2		2		12
Year five	10		10		18
Prior to year five	85		85		82
Within the Revolving Period	303		303		178
Converted to Term	212		212		172
Total	614		614		464
Less than 620 | Retail | Automobile
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	40		40		188
Year two	232		232		309
Year three	302		302		130
Year four	110		110		106
Year five	76		76		56
Prior to year five	42		42		31
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	802		802		820
Less than 620 | Retail | Education
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	3		3		6
Year two	16		16		16
Year three	24		24		20
Year four	24		24		12
Year five	15		15		11
Prior to year five	55		55		50
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	137		137		115
Less than 620 | Retail | Other retail
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	15		15		35
Year two	38		38		30
Year three	20		20		25
Year four	16		16		9
Year five	5		5		4
Prior to year five	3		3		2
Within the Revolving Period	246		246		190
Converted to Term	3		3		6
Total	346		346		301
No FICO available | Retail
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	38		38		22
Year two	3		3		3
Year three	2		2		5
Year four	3		3		3
Year five	3		3		2
Prior to year five	52		52		59
Within the Revolving Period	367		367		380
Converted to Term	0		0		1
Total	468		468		475
No FICO available | Retail | Residential mortgages
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	0		0		2
Year two	0		0		2
Year three	2		2		2
Year four	1		1		3
Year five	3		3		2
Prior to year five	15		15		17
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	21		21		28
No FICO available | Retail | Automobile
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one					2
Year two					0
Year three					0
Year four					0
Year five					0
Prior to year five					0
Within the Revolving Period					0
Converted to Term					0
Total					2
No FICO available | Retail | Education
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	18		18		6
Year two	0		0		0
Year three	0		0		0
Year four	0		0		0
Year five	0		0		0
Prior to year five	37		37		42
Within the Revolving Period	0		0		0
Converted to Term	0		0		0
Total	55		55		48
No FICO available | Retail | Other retail
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one	20		20		12
Year two	3		3		1
Year three	0		0		3
Year four	2		2		0
Year five	0		0		0
Prior to year five	0		0		0
Within the Revolving Period	367		367		380
Converted to Term	0		0		1
Total	$ 392		$ 392		$ 397