Loans and Leases - Loans by FICO Score (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	$ 63,260	$ 62,565
Consumer:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	14,368	14,047
Consumer: | Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	852	1,454
Financing receivable, originated year two	1,401	2,022
Financing receivable, originated year three	1,943	2,715
Financing receivable, originated year four	2,610	2,119
Financing receivable, originated year five	2,018	959
Financing receivable, originated prior to year five	3,416	2,686
Revolving Loans	1,992	1,956
Revolving Loans Converted to Term Loans	136	136
Loans and leases	14,368	14,047
Consumer: | Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	24	40
Financing receivable, originated year two	23	38
Financing receivable, originated year three	22	19
Financing receivable, originated year four	11	9
Financing receivable, originated year five	6	6
Financing receivable, originated prior to year five	81	106
Revolving Loans	416	436
Revolving Loans Converted to Term Loans	14	15
Loans and leases	597	669
FICO score 740 or greater | Consumer: | Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	636	1,045
Financing receivable, originated year two	996	1,493
Financing receivable, originated year three	1,436	2,009
Financing receivable, originated year four	1,931	1,592
Financing receivable, originated year five	1,512	675
Financing receivable, originated prior to year five	2,054	1,554
Revolving Loans	1,526	1,430
Revolving Loans Converted to Term Loans	65	56
Loans and leases	10,156	9,854
FICO score 740 or greater | Consumer: | Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	16	21
Financing receivable, originated year two	13	22
Financing receivable, originated year three	12	10
Financing receivable, originated year four	5	4
Financing receivable, originated year five	3	2
Financing receivable, originated prior to year five	15	19
Revolving Loans	184	197
Revolving Loans Converted to Term Loans	9	8
Loans and leases	257	283
FICO score 720-739 | Consumer: | Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	70	149
Financing receivable, originated year two	142	197
Financing receivable, originated year three	189	270
Financing receivable, originated year four	263	213
Financing receivable, originated year five	202	99
Financing receivable, originated prior to year five	346	271
Revolving Loans	174	175
Revolving Loans Converted to Term Loans	17	17
Loans and leases	1,403	1,391
FICO score 720-739 | Consumer: | Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	2	7
Financing receivable, originated year two	1	3
Financing receivable, originated year three	1	1
Financing receivable, originated year four	1	1
Financing receivable, originated year five	0	0
Financing receivable, originated prior to year five	2	3
Revolving Loans	17	20
Revolving Loans Converted to Term Loans	3	2
Loans and leases	27	37
FICO score 700-719 | Consumer: | Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	60	98
Financing receivable, originated year two	98	140
Financing receivable, originated year three	137	217
Financing receivable, originated year four	209	175
Financing receivable, originated year five	167	72
Financing receivable, originated prior to year five	267	242
Revolving Loans	129	150
Revolving Loans Converted to Term Loans	14	18
Loans and leases	1,081	1,112
FICO score 700-719 | Consumer: | Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	2	1
Financing receivable, originated year two	1	2
Financing receivable, originated year three	1	2
Financing receivable, originated year four	1	0
Financing receivable, originated year five	0	0
Financing receivable, originated prior to year five	2	2
Revolving Loans	17	14
Revolving Loans Converted to Term Loans	0	0
Loans and leases	24	21
FICO score 660-699 | Consumer: | Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	70	133
Financing receivable, originated year two	132	160
Financing receivable, originated year three	153	183
Financing receivable, originated year four	172	100
Financing receivable, originated year five	95	75
Financing receivable, originated prior to year five	305	294
Revolving Loans	114	146
Revolving Loans Converted to Term Loans	19	25
Loans and leases	1,060	1,116
FICO score 660-699 | Consumer: | Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	1	1
Financing receivable, originated year two	1	2
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	2	3
Revolving Loans	15	15
Revolving Loans Converted to Term Loans	1	4
Loans and leases	21	26
FICO score 620-659 | Consumer: | Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	4	11
Financing receivable, originated year two	10	10
Financing receivable, originated year three	10	17
Financing receivable, originated year four	17	21
Financing receivable, originated year five	19	20
Financing receivable, originated prior to year five	111	122
Revolving Loans	22	30
Revolving Loans Converted to Term Loans	6	9
Loans and leases	199	240
FICO score 620-659 | Consumer: | Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	0	2
Financing receivable, originated year two	1	1
Financing receivable, originated year three	1	0
Financing receivable, originated year four	0	0
Financing receivable, originated year five	0	0
Financing receivable, originated prior to year five	1	1
Revolving Loans	8	9
Revolving Loans Converted to Term Loans	0	0
Loans and leases	11	13
FICO score less than 620 | Consumer: | Consumer real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	12	18
Financing receivable, originated year two	23	22
Financing receivable, originated year three	18	19
Financing receivable, originated year four	18	18
Financing receivable, originated year five	23	18
Financing receivable, originated prior to year five	333	203
Revolving Loans	27	25
Revolving Loans Converted to Term Loans	15	11
Loans and leases	469	334
FICO score less than 620 | Consumer: | Credit Card and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable, originated year one	3	8
Financing receivable, originated year two	6	8
Financing receivable, originated year three	6	5
Financing receivable, originated year four	4	4
Financing receivable, originated year five	3	4
Financing receivable, originated prior to year five	59	78
Revolving Loans	175	181
Revolving Loans Converted to Term Loans	1	1
Loans and leases	$ 257	$ 289