Loans and Leases and the Allowance for Credit Losses - Summary of loans in Accrual and Nonaccrual Status (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	$ 15,279		$ 15,279		$ 18,423
Year two	15,890		15,890		21,683
Year three	18,767		18,767		15,025
Year four	12,542		12,542		10,555
Year five	8,957		8,957		10,062
Prior	30,732		30,732		27,464
Total	135,920		135,920		134,068
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Year one	12		19
Year two	20		55
Year three	35		76
Year four	10		42
Year five	7		31
Prior	39		127
Total	154	$ 122	497	$ 379
Residential Real Estate
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total	1	1	4	4
Consumer:
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total	65	$ 43	181	$ 125
Revolving Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	32,184		32,184		29,237
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Revolving Loans	30		144
Revolving Loans Converted to Term Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	1,569		1,569		1,619
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Revolving Loans Converted to Term Loans	1		3
Residential | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	1,567		1,567		1,746
Year two	1,435		1,435		4,876
Year three	4,651		4,651		3,858
Year four	3,679		3,679		2,615
Year five	2,483		2,483		1,261
Prior	8,278		8,278		7,901
Total	22,196		22,196		22,353
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Year one	0		0
Year two	0		0
Year three	0		0
Year four	0		0
Year five	0		0
Prior	1		4
Total	1		4
Residential | Revolving Loans | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	103		103		96
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Revolving Loans	0		0
Residential | Revolving Loans Converted to Term Loans | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Revolving Loans Converted to Term Loans	0		0
Residential — limited documentation | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0		0		0
Year two	0		0		0
Year three	0		0		0
Year four	0		0		0
Year five	0		0		0
Prior	823		823		911
Total	823		823		911
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Year one	0		0
Year two	0		0
Year three	0		0
Year four	0		0
Year five	0		0
Prior	0		0
Total	0		0
Residential — limited documentation | Revolving Loans | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	0		0		0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Revolving Loans	0		0
Residential — limited documentation | Revolving Loans Converted to Term Loans | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Revolving Loans Converted to Term Loans	0		0
Home equity lines and loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0		0		0
Year two	0		0		0
Year three	0		0		2
Year four	2		2		2
Year five	2		2		13
Prior	100		100		106
Total	4,576		4,576		4,649
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Year one	0		0
Year two	0		0
Year three	0		0
Year four	0		0
Year five	0		0
Prior	0		0
Total	1		3
Home equity lines and loans | Revolving Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	3,038		3,038		3,025
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Revolving Loans	0		0
Home equity lines and loans | Revolving Loans Converted to Term Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	1,434		1,434		1,501
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Revolving Loans Converted to Term Loans	1		3
Recreational finance | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	3,162		3,162		2,667
Year two	2,241		2,241		2,359
Year three	2,045		2,045		1,884
Year four	1,630		1,630		1,306
Year five	1,120		1,120		797
Prior	1,541		1,541		1,045
Total	11,739		11,739		10,058
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Year one	3		4
Year two	5		12
Year three	6		17
Year four	4		14
Year five	4		11
Prior	6		18
Total	28		76
Recreational finance | Revolving Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	0		0		0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Revolving Loans	0		0
Recreational finance | Revolving Loans Converted to Term Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Revolving Loans Converted to Term Loans	0		0
Automobile | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	1,883		1,883		1,073
Year two	869		869		1,114
Year three	841		841		1,067
Year four	743		743		438
Year five	273		273		206
Prior	134		134		94
Total	4,743		4,743		3,992
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Year one	1		1
Year two	2		6
Year three	2		6
Year four	1		5
Year five	1		2
Prior	0		2
Total	7		22
Automobile | Revolving Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	0		0		0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Revolving Loans	0		0
Automobile | Revolving Loans Converted to Term Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Revolving Loans Converted to Term Loans	0		0
Other | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	210		210		255
Year two	171		171		180
Year three	124		124		121
Year four	82		82		33
Year five	18		18		13
Prior	20		20		19
Total	2,148		2,148		2,092
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Year one	5		10
Year two	3		9
Year three	2		7
Year four	1		4
Year five	0		1
Prior	0		2
Total	29		80
Other | Revolving Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	1,521		1,521		1,467
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Revolving Loans	18		47
Other | Revolving Loans Converted to Term Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	2		2		4
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Revolving Loans Converted to Term Loans	0		0
Current | Residential | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	1,550		1,550		1,726
Year two	1,415		1,415		4,709
Year three	4,481		4,481		3,732
Year four	3,559		3,559		2,543
Year five	2,427		2,427		1,215
Prior	7,510		7,510		7,060
Total	21,042		21,042		21,080
Current | Residential | Revolving Loans | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	100		100		95
Current | Residential | Revolving Loans Converted to Term Loans | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
Current | Residential — limited documentation | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0		0		0
Year two	0		0		0
Year three	0		0		0
Year four	0		0		0
Year five	0		0		0
Prior	737		737		825
Total	737		737		825
Current | Residential — limited documentation | Revolving Loans | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	0		0		0
Current | Residential — limited documentation | Revolving Loans Converted to Term Loans | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
Current | Home equity lines and loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0		0		0
Year two	0		0		0
Year three	0		0		2
Year four	2		2		2
Year five	2		2		13
Prior	95		95		98
Total	4,464		4,464		4,528
Current | Home equity lines and loans | Revolving Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	3,038		3,038		3,022
Current | Home equity lines and loans | Revolving Loans Converted to Term Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	1,327		1,327		1,391
Current | Recreational finance | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	3,153		3,153		2,653
Year two	2,219		2,219		2,338
Year three	2,026		2,026		1,857
Year four	1,609		1,609		1,286
Year five	1,102		1,102		781
Prior	1,512		1,512		1,020
Total	11,621		11,621		9,935
Current | Recreational finance | Revolving Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	0		0		0
Current | Recreational finance | Revolving Loans Converted to Term Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
Current | Automobile | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	1,875		1,875		1,063
Year two	856		856		1,096
Year three	826		826		1,047
Year four	729		729		427
Year five	267		267		198
Prior	127		127		87
Total	4,680		4,680		3,918
Current | Automobile | Revolving Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	0		0		0
Current | Automobile | Revolving Loans Converted to Term Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
Current | Other | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	205		205		250
Year two	168		168		176
Year three	121		121		118
Year four	81		81		33
Year five	18		18		13
Prior	20		20		18
Total	2,066		2,066		2,003
Current | Other | Revolving Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	1,452		1,452		1,392
Current | Other | Revolving Loans Converted to Term Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	1		1		3
30-89 days past due | Residential | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	17		17		18
Year two	10		10		120
Year three	114		114		88
Year four	76		76		52
Year five	35		35		28
Prior	415		415		457
Total	667		667		763
30-89 days past due | Residential | Revolving Loans | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	0		0		0
30-89 days past due | Residential | Revolving Loans Converted to Term Loans | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
30-89 days past due | Residential — limited documentation | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0		0		0
Year two	0		0		0
Year three	0		0		0
Year four	0		0		0
Year five	0		0		0
Prior	29		29		31
Total	29		29		31
30-89 days past due | Residential — limited documentation | Revolving Loans | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	0		0		0
30-89 days past due | Residential — limited documentation | Revolving Loans Converted to Term Loans | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
30-89 days past due | Home equity lines and loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0		0		0
Year two	0		0		0
Year three	0		0		0
Year four	0		0		0
Year five	0		0		0
Prior	2		2		3
Total	30		30		40
30-89 days past due | Home equity lines and loans | Revolving Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	0		0		0
30-89 days past due | Home equity lines and loans | Revolving Loans Converted to Term Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	28		28		37
30-89 days past due | Recreational finance | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	8		8		11
Year two	17		17		16
Year three	14		14		19
Year four	16		16		14
Year five	14		14		11
Prior	21		21		16
Total	90		90		87
30-89 days past due | Recreational finance | Revolving Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	0		0		0
30-89 days past due | Recreational finance | Revolving Loans Converted to Term Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
30-89 days past due | Automobile | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	7		7		8
Year two	11		11		15
Year three	13		13		17
Year four	11		11		9
Year five	5		5		6
Prior	5		5		5
Total	52		52		60
30-89 days past due | Automobile | Revolving Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	0		0		0
30-89 days past due | Automobile | Revolving Loans Converted to Term Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
30-89 days past due | Other | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	3		3		3
Year two	2		2		3
Year three	2		2		2
Year four	1		1		0
Year five	0		0		0
Prior	0		0		1
Total	20		20		30
30-89 days past due | Other | Revolving Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	11		11		20
30-89 days past due | Other | Revolving Loans Converted to Term Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	1		1		1
Accruing Loans Past Due 90 Days or More | Residential | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0		0		1
Year two	8		8		30
Year three	29		29		28
Year four	29		29		17
Year five	18		18		14
Prior	184		184		205
Total	268		268		295
Accruing Loans Past Due 90 Days or More | Residential | Revolving Loans | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	0		0		0
Accruing Loans Past Due 90 Days or More | Residential | Revolving Loans Converted to Term Loans | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
Accruing Loans Past Due 90 Days or More | Residential — limited documentation | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0		0		0
Year two	0		0		0
Year three	0		0		0
Year four	0		0		0
Year five	0		0		0
Prior	0		0		0
Total	0		0		0
Accruing Loans Past Due 90 Days or More | Residential — limited documentation | Revolving Loans | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	0		0		0
Accruing Loans Past Due 90 Days or More | Residential — limited documentation | Revolving Loans Converted to Term Loans | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
Accruing Loans Past Due 90 Days or More | Home equity lines and loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0		0		0
Year two	0		0		0
Year three	0		0		0
Year four	0		0		0
Year five	0		0		0
Prior	0		0		0
Total	0		0		0
Accruing Loans Past Due 90 Days or More | Home equity lines and loans | Revolving Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	0		0		0
Accruing Loans Past Due 90 Days or More | Home equity lines and loans | Revolving Loans Converted to Term Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
Accruing Loans Past Due 90 Days or More | Recreational finance | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0		0		0
Year two	0		0		0
Year three	0		0		0
Year four	0		0		0
Year five	0		0		0
Prior	0		0		0
Total	0		0		0
Accruing Loans Past Due 90 Days or More | Recreational finance | Revolving Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	0		0		0
Accruing Loans Past Due 90 Days or More | Recreational finance | Revolving Loans Converted to Term Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
Accruing Loans Past Due 90 Days or More | Automobile | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0		0		0
Year two	0		0		0
Year three	0		0		0
Year four	0		0		0
Year five	0		0		0
Prior	0		0		0
Total	0		0		0
Accruing Loans Past Due 90 Days or More | Automobile | Revolving Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	0		0		0
Accruing Loans Past Due 90 Days or More | Automobile | Revolving Loans Converted to Term Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
Accruing Loans Past Due 90 Days or More | Other | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0		0		0
Year two	0		0		0
Year three	0		0		0
Year four	0		0		0
Year five	0		0		0
Prior	0		0		0
Total	7		7		7
Accruing Loans Past Due 90 Days or More | Other | Revolving Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	7		7		7
Accruing Loans Past Due 90 Days or More | Other | Revolving Loans Converted to Term Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
Nonaccrual | Residential | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0		0		1
Year two	2		2		17
Year three	27		27		10
Year four	15		15		3
Year five	3		3		4
Prior	169		169		179
Total	219		219		215
Nonaccrual | Residential | Revolving Loans | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	3		3		1
Nonaccrual | Residential | Revolving Loans Converted to Term Loans | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
Nonaccrual | Residential — limited documentation | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0		0		0
Year two	0		0		0
Year three	0		0		0
Year four	0		0		0
Year five	0		0		0
Prior	57		57		55
Total	57		57		55
Nonaccrual | Residential — limited documentation | Revolving Loans | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	0		0		0
Nonaccrual | Residential — limited documentation | Revolving Loans Converted to Term Loans | Residential Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
Nonaccrual | Home equity lines and loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	0		0		0
Year two	0		0		0
Year three	0		0		0
Year four	0		0		0
Year five	0		0		0
Prior	3		3		5
Total	82		82		81
Nonaccrual | Home equity lines and loans | Revolving Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	0		0		3
Nonaccrual | Home equity lines and loans | Revolving Loans Converted to Term Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	79		79		73
Nonaccrual | Recreational finance | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	1		1		3
Year two	5		5		5
Year three	5		5		8
Year four	5		5		6
Year five	4		4		5
Prior	8		8		9
Total	28		28		36
Nonaccrual | Recreational finance | Revolving Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	0		0		0
Nonaccrual | Recreational finance | Revolving Loans Converted to Term Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
Nonaccrual | Automobile | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	1		1		2
Year two	2		2		3
Year three	2		2		3
Year four	3		3		2
Year five	1		1		2
Prior	2		2		2
Total	11		11		14
Nonaccrual | Automobile | Revolving Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	0		0		0
Nonaccrual | Automobile | Revolving Loans Converted to Term Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	0		0		0
Nonaccrual | Other | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Year one	2		2		2
Year two	1		1		1
Year three	1		1		1
Year four	0		0		0
Year five	0		0		0
Prior	0		0		0
Total	55		55		52
Nonaccrual | Other | Revolving Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans	51		51		48
Nonaccrual | Other | Revolving Loans Converted to Term Loans | Consumer:
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Converted to Term Loans	$ 0		$ 0		$ 0