v3.26.1
Allowance for Credit Losses (Non-Accrual Loans and Leases and Loans and Leases Past Due) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Financing Receivable, Past Due [Line Items]    
Loans and leases $ 47,697 $ 47,776
Non-Accrual 187 116
Loans Insured or Guaranteed by US Government Authorities [Member]    
Financing Receivable, Past Due [Line Items]    
Non-Accrual 40 38
Greater than 30 to 59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans and leases 116 39
60 to 89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans and leases 52 55
90 Days or More and Accruing (2)    
Financing Receivable, Past Due [Line Items]    
Loans and leases 78 85
90 Days or More and Accruing (2) | Loans Insured or Guaranteed by US Government Authorities [Member]    
Financing Receivable, Past Due [Line Items]    
Loans and leases 48 41
Total Past Due    
Financing Receivable, Past Due [Line Items]    
Loans and leases 246 179
Current and Other    
Financing Receivable, Past Due [Line Items]    
Loans and leases 47,264 47,481
Commercial real estate    
Financing Receivable, Past Due [Line Items]    
Loans and leases 27,587 27,870
Commercial real estate | Non-owner occupied term    
Financing Receivable, Past Due [Line Items]    
Loans and leases 8,113 8,206
Non-Accrual 40 29
Commercial real estate | Owner occupied term    
Financing Receivable, Past Due [Line Items]    
Loans and leases 7,258 7,314
Non-Accrual 51 21
Commercial real estate | Multifamily    
Financing Receivable, Past Due [Line Items]    
Loans and leases 10,173 10,281
Non-Accrual 0 0
Commercial real estate | Construction & development    
Financing Receivable, Past Due [Line Items]    
Loans and leases 1,670 1,707
Non-Accrual 0 0
Commercial real estate | Residential development    
Financing Receivable, Past Due [Line Items]    
Loans and leases 373 362
Non-Accrual 0 0
Commercial real estate | Greater than 30 to 59 Days Past Due | Non-owner occupied term    
Financing Receivable, Past Due [Line Items]    
Loans and leases 9 2
Commercial real estate | Greater than 30 to 59 Days Past Due | Owner occupied term    
Financing Receivable, Past Due [Line Items]    
Loans and leases 5 6
Commercial real estate | Greater than 30 to 59 Days Past Due | Multifamily    
Financing Receivable, Past Due [Line Items]    
Loans and leases 5 0
Commercial real estate | Greater than 30 to 59 Days Past Due | Construction & development    
Financing Receivable, Past Due [Line Items]    
Loans and leases 38 0
Commercial real estate | Greater than 30 to 59 Days Past Due | Residential development    
Financing Receivable, Past Due [Line Items]    
Loans and leases 0 0
Commercial real estate | 60 to 89 Days Past Due | Non-owner occupied term    
Financing Receivable, Past Due [Line Items]    
Loans and leases 3 0
Commercial real estate | 60 to 89 Days Past Due | Owner occupied term    
Financing Receivable, Past Due [Line Items]    
Loans and leases 12 5
Commercial real estate | 60 to 89 Days Past Due | Multifamily    
Financing Receivable, Past Due [Line Items]    
Loans and leases 6 1
Commercial real estate | 60 to 89 Days Past Due | Construction & development    
Financing Receivable, Past Due [Line Items]    
Loans and leases 0 0
Commercial real estate | 60 to 89 Days Past Due | Residential development    
Financing Receivable, Past Due [Line Items]    
Loans and leases 0 0
Commercial real estate | 90 Days or More and Accruing (2) | Non-owner occupied term    
Financing Receivable, Past Due [Line Items]    
Loans and leases 0 0
Commercial real estate | 90 Days or More and Accruing (2) | Owner occupied term    
Financing Receivable, Past Due [Line Items]    
Loans and leases 3 1
Commercial real estate | 90 Days or More and Accruing (2) | Multifamily    
Financing Receivable, Past Due [Line Items]    
Loans and leases 0 1
Commercial real estate | 90 Days or More and Accruing (2) | Construction & development    
Financing Receivable, Past Due [Line Items]    
Loans and leases 0 0
Commercial real estate | 90 Days or More and Accruing (2) | Residential development    
Financing Receivable, Past Due [Line Items]    
Loans and leases 0 0
Commercial real estate | Total Past Due | Non-owner occupied term    
Financing Receivable, Past Due [Line Items]    
Loans and leases 12 2
Commercial real estate | Total Past Due | Owner occupied term    
Financing Receivable, Past Due [Line Items]    
Loans and leases 20 12
Commercial real estate | Total Past Due | Multifamily    
Financing Receivable, Past Due [Line Items]    
Loans and leases 11 2
Commercial real estate | Total Past Due | Construction & development    
Financing Receivable, Past Due [Line Items]    
Loans and leases 38 0
Commercial real estate | Total Past Due | Residential development    
Financing Receivable, Past Due [Line Items]    
Loans and leases 0 0
Commercial real estate | Current and Other | Non-owner occupied term    
Financing Receivable, Past Due [Line Items]    
Loans and leases 8,061 8,175
Commercial real estate | Current and Other | Owner occupied term    
Financing Receivable, Past Due [Line Items]    
Loans and leases 7,187 7,281
Commercial real estate | Current and Other | Multifamily    
Financing Receivable, Past Due [Line Items]    
Loans and leases 10,162 10,279
Commercial real estate | Current and Other | Construction & development    
Financing Receivable, Past Due [Line Items]    
Loans and leases 1,632 1,707
Commercial real estate | Current and Other | Residential development    
Financing Receivable, Past Due [Line Items]    
Loans and leases 373 362
Commercial    
Financing Receivable, Past Due [Line Items]    
Loans and leases 12,310 11,955
Commercial | Term    
Financing Receivable, Past Due [Line Items]    
Loans and leases 6,887 6,713
Non-Accrual 30 25
Commercial | Lines of credit & other    
Financing Receivable, Past Due [Line Items]    
Loans and leases 3,804 3,643
Non-Accrual 47 22
Commercial | Leases & equipment finance    
Financing Receivable, Past Due [Line Items]    
Loans and leases 1,619 1,599
Non-Accrual 19 19
Commercial | Greater than 30 to 59 Days Past Due | Term    
Financing Receivable, Past Due [Line Items]    
Loans and leases 5 2
Commercial | Greater than 30 to 59 Days Past Due | Lines of credit & other    
Financing Receivable, Past Due [Line Items]    
Loans and leases 8 4
Commercial | Greater than 30 to 59 Days Past Due | Leases & equipment finance    
Financing Receivable, Past Due [Line Items]    
Loans and leases 22 17
Commercial | 60 to 89 Days Past Due | Term    
Financing Receivable, Past Due [Line Items]    
Loans and leases 6 7
Commercial | 60 to 89 Days Past Due | Lines of credit & other    
Financing Receivable, Past Due [Line Items]    
Loans and leases 2 3
Commercial | 60 to 89 Days Past Due | Leases & equipment finance    
Financing Receivable, Past Due [Line Items]    
Loans and leases 11 18
Commercial | 90 Days or More and Accruing (2) | Term    
Financing Receivable, Past Due [Line Items]    
Loans and leases 1 2
Commercial | 90 Days or More and Accruing (2) | Lines of credit & other    
Financing Receivable, Past Due [Line Items]    
Loans and leases 1 1
Commercial | 90 Days or More and Accruing (2) | Leases & equipment finance    
Financing Receivable, Past Due [Line Items]    
Loans and leases 0 5
Commercial | Total Past Due | Term    
Financing Receivable, Past Due [Line Items]    
Loans and leases 12 11
Commercial | Total Past Due | Lines of credit & other    
Financing Receivable, Past Due [Line Items]    
Loans and leases 11 8
Commercial | Total Past Due | Leases & equipment finance    
Financing Receivable, Past Due [Line Items]    
Loans and leases 33 40
Commercial | Current and Other | Term    
Financing Receivable, Past Due [Line Items]    
Loans and leases 6,845 6,677
Commercial | Current and Other | Lines of credit & other    
Financing Receivable, Past Due [Line Items]    
Loans and leases 3,746 3,613
Commercial | Current and Other | Leases & equipment finance    
Financing Receivable, Past Due [Line Items]    
Loans and leases 1,567 1,540
Residential    
Financing Receivable, Past Due [Line Items]    
Loans and leases 7,630 7,773
Residential | Mortgage    
Financing Receivable, Past Due [Line Items]    
Loans and leases 5,483 5,624
Non-Accrual 0 0
Residential | Home equity loans & lines    
Financing Receivable, Past Due [Line Items]    
Loans and leases 2,147 2,149
Non-Accrual 0 0
Residential | Greater than 30 to 59 Days Past Due | Mortgage    
Financing Receivable, Past Due [Line Items]    
Loans and leases 14 0
Residential | Greater than 30 to 59 Days Past Due | Home equity loans & lines    
Financing Receivable, Past Due [Line Items]    
Loans and leases 7 8
Residential | 60 to 89 Days Past Due | Mortgage    
Financing Receivable, Past Due [Line Items]    
Loans and leases 9 16
Residential | 60 to 89 Days Past Due | Home equity loans & lines    
Financing Receivable, Past Due [Line Items]    
Loans and leases 3 5
Residential | 90 Days or More and Accruing (2) | Mortgage    
Financing Receivable, Past Due [Line Items]    
Loans and leases 63 66
Residential | 90 Days or More and Accruing (2) | Mortgage | GNMA Loans    
Financing Receivable, Past Due [Line Items]    
GNMA Loans past due by 90 days, but not yet repurchased 4 3
Residential | 90 Days or More and Accruing (2) | Home equity loans & lines    
Financing Receivable, Past Due [Line Items]    
Loans and leases 10 9
Residential | Total Past Due | Mortgage    
Financing Receivable, Past Due [Line Items]    
Loans and leases 86 82
Residential | Total Past Due | Home equity loans & lines    
Financing Receivable, Past Due [Line Items]    
Loans and leases 20 22
Residential | Current and Other | Mortgage    
Financing Receivable, Past Due [Line Items]    
Loans and leases 5,397 5,542
Residential | Current and Other | Home equity loans & lines    
Financing Receivable, Past Due [Line Items]    
Loans and leases 2,127 2,127
Consumer & other    
Financing Receivable, Past Due [Line Items]    
Loans and leases 170 178
Non-Accrual 0 0
Consumer & other | Greater than 30 to 59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans and leases 3 0
Consumer & other | 60 to 89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans and leases 0 0
Consumer & other | 90 Days or More and Accruing (2)    
Financing Receivable, Past Due [Line Items]    
Loans and leases 0 0
Consumer & other | Total Past Due    
Financing Receivable, Past Due [Line Items]    
Loans and leases 3 0
Consumer & other | Current and Other    
Financing Receivable, Past Due [Line Items]    
Loans and leases $ 167 $ 178