v3.26.1
Loans and Related Allowance for Credit Losses (Home Equity and Residential Real Estate Credit Quality Indicators) (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Total loans, net [1] $ 360,923   $ 331,481
Gross charge-offs      
Total 309 $ 312  
Residential real estate      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 679   2,135
Year two 2,728   1,786
Year three 2,152   3,774
Year four 3,812   8,807
Year five 9,997   13,741
Prior 30,199   13,517
Revolving Loans 0   0
Revolving Loans Converted to Term 0   0
Total loans, net 49,567   43,760
Gross charge-offs      
Year one 0   0
Year two 0   1
Year three 0   1
Year four 0   3
Year five 0   2
Prior 1   1
Revolving Loans 0   0
Revolving Loans Converted to Term 0   0
Total 1   8
Home equity      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 30   0
Year two 37   0
Year three 28   0
Year four 26   0
Year five 20   131
Prior 3,821   3,841
Revolving Loans 9,779   9,336
Revolving Loans Converted to Term 12,482   12,633
Total loans, net 26,223   25,941
Gross charge-offs      
Year one 0   0
Year two 0   0
Year three 0   0
Year four 0   0
Year five 0   0
Prior 0   0
Revolving Loans 3   13
Revolving Loans Converted to Term 7   22
Total 10   35
Greater than or equal to 780 | Residential real estate      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 300   1,337
Year two 1,667   1,325
Year three 1,398   2,748
Year four 2,595   7,065
Year five 7,535   11,095
Prior 20,727   8,644
Revolving Loans 0   0
Revolving Loans Converted to Term 0   0
Total loans, net 34,222   32,214
Greater than or equal to 780 | Home equity      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 4   0
Year two 18   0
Year three 10   0
Year four 8   0
Year five 9   86
Prior 2,435   2,465
Revolving Loans 5,715   5,423
Revolving Loans Converted to Term 5,909   5,967
Total loans, net 14,108   13,941
720 to 779 | Residential real estate      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 277   661
Year two 617   354
Year three 422   568
Year four 638   1,206
Year five 1,412   1,837
Prior 4,659   2,225
Revolving Loans 0   0
Revolving Loans Converted to Term 0   0
Total loans, net 8,025   6,851
720 to 779 | Home equity      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 1   0
Year two 10   0
Year three 7   0
Year four 8   0
Year five 5   29
Prior 746   737
Revolving Loans 2,535   2,504
Revolving Loans Converted to Term 2,999   3,063
Total loans, net 6,311   6,333
660 to 719 | Residential real estate      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 35   117
Year two 180   86
Year three 125   192
Year four 235   394
Year five 430   543
Prior 1,734   978
Revolving Loans 0   0
Revolving Loans Converted to Term 0   0
Total loans, net 2,739   2,310
660 to 719 | Home equity      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 1   0
Year two 5   0
Year three 5   0
Year four 4   0
Year five 2   11
Prior 371   372
Revolving Loans 1,263   1,200
Revolving Loans Converted to Term 2,049   2,077
Total loans, net 3,700   3,660
Less than 660 | Residential real estate      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 2   19
Year two 40   15
Year three 41   134
Year four 139   109
Year five 176   181
Prior 1,015   751
Revolving Loans 0   0
Revolving Loans Converted to Term 0   0
Total loans, net 1,413   1,209
Less than 660 | Home equity      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 0   0
Year two 1   0
Year three 3   0
Year four 5   0
Year five 3   5
Prior 267   265
Revolving Loans 224   207
Revolving Loans Converted to Term 1,496   1,496
Total loans, net 1,999   1,973
No FICO score available (a) | Residential real estate      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 65   1
Year two 223   0
Year three 159   106
Year four 174   6
Year five 411   65
Prior 1,489   372
Revolving Loans 0   0
Revolving Loans Converted to Term 0   0
Total loans, net 2,521   550
No FICO score available (a) | Home equity      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 24   0
Year two 3   0
Year three 3   0
Year four 1   0
Year five 1   0
Prior 2   2
Revolving Loans 42   2
Revolving Loans Converted to Term 29   30
Total loans, net 105   34
Government insured or guaranteed loans | Residential real estate      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 0   0
Year two 1   6
Year three 7   26
Year four 31   27
Year five 33   20
Prior 575   547
Revolving Loans 0   0
Revolving Loans Converted to Term 0   0
Total loans, net 647   626
Greater than 100% | Residential real estate      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 0   7
Year two 7   24
Year three 40   74
Year four 59   70
Year five 62   55
Prior 127   51
Revolving Loans 0   0
Revolving Loans Converted to Term 0   0
Total loans, net 295   281
Greater than 100% | Home equity      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 0   0
Year two 0   0
Year three 0   0
Year four 0   0
Year five 0   1
Prior 27   24
Revolving Loans 468   422
Revolving Loans Converted to Term 446   422
Total loans, net 941   869
Greater than or equal to 80% to 100% | Residential real estate      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 164   534
Year two 490   290
Year three 286   342
Year four 394   707
Year five 840   447
Prior 756   223
Revolving Loans 0   0
Revolving Loans Converted to Term 0   0
Total loans, net 2,930   2,543
Greater than or equal to 80% to 100% | Home equity      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 2   0
Year two 0   0
Year three 0   0
Year four 0   0
Year five 0   5
Prior 48   45
Revolving Loans 1,456   1,342
Revolving Loans Converted to Term 1,597   1,562
Total loans, net 3,103   2,954
Less than 80% | Residential real estate      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 515   1,594
Year two 2,230   1,466
Year three 1,819   3,332
Year four 3,328   8,003
Year five 9,062   13,210
Prior 28,730   12,694
Revolving Loans 0   0
Revolving Loans Converted to Term 0   0
Total loans, net 45,684   40,299
Less than 80% | Home equity      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 19   0
Year two 37   0
Year three 28   0
Year four 26   0
Year five 20   125
Prior 3,745   3,772
Revolving Loans 7,851   7,572
Revolving Loans Converted to Term 10,436   10,649
Total loans, net 22,162   22,118
No LTV available | Residential real estate      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 0   0
Year two 0   0
Year three 0   0
Year four 0   0
Year five 0   9
Prior 11   2
Revolving Loans 0   0
Revolving Loans Converted to Term 0   0
Total loans, net 11   $ 11
No LTV available | Home equity      
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]      
Year one 9    
Year two 0    
Year three 0    
Year four 0    
Year five 0    
Prior 1    
Revolving Loans 4    
Revolving Loans Converted to Term 3    
Total loans, net $ 17    
[1] Our consolidated assets included the following for which we have elected the fair value option: Loans held for sale of $1.2 billion, Loans held for investment of $1.1 billion and Other assets of $0.1 billion at March 31, 2026. Comparable amounts at December 31, 2025 were $1.7 billion, $1.1 billion and $0.2 billion, respectively.