Loans and Leases - Loans by FICO Score, Consumer (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	$ 61,292	$ 58,102
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	13,650	12,253
Consumer real estate | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	2,130	2,938
Financing receivable, originated year two	2,854	2,479
Financing receivable, originated year three	2,291	1,175
Financing receivable, originated year four	1,043	784
Financing receivable, originated year five	706	452
Financing receivable, originated prior to year five	2,407	2,397
Revolving loans	2,101	1,877
Revolving Loans converted to term loans	118	151
Loans and leases	13,650	12,253
Consumer real estate | Consumer | FICO score 740 or greater
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	1,572	2,154
Financing receivable, originated year two	2,099	1,847
Financing receivable, originated year three	1,720	819
Financing receivable, originated year four	730	523
Financing receivable, originated year five	465	278
Financing receivable, originated prior to year five	1,332	1,294
Revolving loans	1,522	1,297
Revolving Loans converted to term loans	50	63
Loans and leases	9,490	8,275
Consumer real estate | Consumer | FICO score 720-739
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	205	292
Financing receivable, originated year two	286	246
Financing receivable, originated year three	227	116
Financing receivable, originated year four	107	98
Financing receivable, originated year five	88	34
Financing receivable, originated prior to year five	230	238
Revolving loans	192	183
Revolving Loans converted to term loans	15	18
Loans and leases	1,350	1,225
Consumer real estate | Consumer | FICO score 700-719
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	154	242
Financing receivable, originated year two	232	206
Financing receivable, originated year three	193	93
Financing receivable, originated year four	81	55
Financing receivable, originated year five	52	35
Financing receivable, originated prior to year five	224	226
Revolving loans	159	142
Revolving Loans converted to term loans	17	22
Loans and leases	1,112	1,021
Consumer real estate | Consumer | FICO score 660-699
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	170	214
Financing receivable, originated year two	198	137
Financing receivable, originated year three	113	90
Financing receivable, originated year four	83	55
Financing receivable, originated year five	53	62
Financing receivable, originated prior to year five	290	278
Revolving loans	168	192
Revolving Loans converted to term loans	18	23
Loans and leases	1,093	1,051
Consumer real estate | Consumer | FICO score 620-659
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	11	21
Financing receivable, originated year two	20	24
Financing receivable, originated year three	23	25
Financing receivable, originated year four	22	41
Financing receivable, originated year five	36	20
Financing receivable, originated prior to year five	106	105
Revolving loans	36	47
Revolving Loans converted to term loans	7	9
Loans and leases	261	292
Consumer real estate | Consumer | FICO score less than 620
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	18	15
Financing receivable, originated year two	19	19
Financing receivable, originated year three	15	32
Financing receivable, originated year four	20	12
Financing receivable, originated year five	12	23
Financing receivable, originated prior to year five	225	256
Revolving loans	24	16
Revolving Loans converted to term loans	11	16
Loans and leases	344	389
Credit card and other | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	80	53
Financing receivable, originated year two	46	30
Financing receivable, originated year three	20	21
Financing receivable, originated year four	16	23
Financing receivable, originated year five	19	13
Financing receivable, originated prior to year five	150	114
Revolving loans	454	576
Revolving Loans converted to term loans	8	10
Loans and leases	793	840
Credit card and other | Consumer | FICO score 740 or greater
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	52	36
Financing receivable, originated year two	26	14
Financing receivable, originated year three	10	10
Financing receivable, originated year four	5	10
Financing receivable, originated year five	3	4
Financing receivable, originated prior to year five	27	25
Revolving loans	207	291
Revolving Loans converted to term loans	5	6
Loans and leases	335	396
Credit card and other | Consumer | FICO score 720-739
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	5	3
Financing receivable, originated year two	3	2
Financing receivable, originated year three	1	2
Financing receivable, originated year four	1	1
Financing receivable, originated year five	1	0
Financing receivable, originated prior to year five	5	4
Revolving loans	24	30
Revolving Loans converted to term loans	1	1
Loans and leases	41	43
Credit card and other | Consumer | FICO score 700-719
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	5	3
Financing receivable, originated year two	4	3
Financing receivable, originated year three	1	1
Financing receivable, originated year four	1	1
Financing receivable, originated year five	1	0
Financing receivable, originated prior to year five	4	4
Revolving loans	25	33
Revolving Loans converted to term loans	1	1
Loans and leases	42	46
Credit card and other | Consumer | FICO score 660-699
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	4	3
Financing receivable, originated year two	3	2
Financing receivable, originated year three	1	1
Financing receivable, originated year four	1	1
Financing receivable, originated year five	1	2
Financing receivable, originated prior to year five	8	7
Revolving loans	23	30
Revolving Loans converted to term loans	0	1
Loans and leases	41	47
Credit card and other | Consumer | FICO score 620-659
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	2	1
Financing receivable, originated year two	1	3
Financing receivable, originated year three	1	1
Financing receivable, originated year four	0	0
Financing receivable, originated year five	0	0
Financing receivable, originated prior to year five	3	3
Revolving loans	7	18
Revolving Loans converted to term loans	0	0
Loans and leases	14	26
Credit card and other | Consumer | FICO score less than 620
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	12	7
Financing receivable, originated year two	9	6
Financing receivable, originated year three	6	6
Financing receivable, originated year four	8	10
Financing receivable, originated year five	13	7
Financing receivable, originated prior to year five	103	71
Revolving loans	168	174
Revolving Loans converted to term loans	1	1
Loans and leases	$ 320	$ 282