v3.26.1
Business Segment Information - Noninterest Expense (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Disaggregation of Revenue [Line Items]    
Personnel expense $ 289 $ 279
Computer software 38 32
Net occupancy expense 35 35
Operations services 25 23
Legal and professional fees 16 14
Deposit insurance expense 13 13
Equipment expense 11 10
Advertising and public relations 10 10
Amortization of intangible assets 8 10
Other expense 60 61
Cost allocations 0 0
Total noninterest expense 505 487
Commercial, Consumer & Wealth    
Disaggregation of Revenue [Line Items]    
Personnel expense 142 135
Computer software 8 7
Net occupancy expense 18 21
Operations services 4 4
Legal and professional fees 4 3
Deposit insurance expense 0 0
Equipment expense 3 2
Advertising and public relations 1 1
Amortization of intangible assets 8 9
Other expense 17 19
Cost allocations 163 143
Total noninterest expense 368 344
Wholesale    
Disaggregation of Revenue [Line Items]    
Personnel expense 56 51
Computer software 2 2
Net occupancy expense 3 2
Operations services 6 6
Legal and professional fees 1 1
Deposit insurance expense 0 0
Equipment expense 0 0
Advertising and public relations 0 0
Amortization of intangible assets 0 0
Other expense 7 7
Cost allocations 8 6
Total noninterest expense 83 75
Corporate    
Disaggregation of Revenue [Line Items]    
Personnel expense 91 93
Computer software 28 23
Net occupancy expense 14 12
Operations services 15 13
Legal and professional fees 11 10
Deposit insurance expense 13 13
Equipment expense 8 8
Advertising and public relations 9 9
Amortization of intangible assets 0 1
Other expense 36 35
Cost allocations (171) (149)
Total noninterest expense $ 54 $ 68