v3.26.1
Lending Activities - Credit quality of residential mortgages (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Financing Receivable, Credit Quality Indicator [Line Items]    
Total $ 54,644 $ 55,208
Residential mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, excluding accrued interest, year one 115 2,033
Financing receivable, excluding accrued interest, year two 2,198 3,346
Financing receivable, excluding accrued interest, year three 3,159 1,810
Financing receivable, excluding accrued interest, year four 1,661 1,365
Financing receivable, excluding accrued interest, year five 1,300 2,785
Prior 5,106 2,500
Total 13,539 13,839
Residential mortgages | Consumer Borrower    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 7,400 7,800
780 and greater | Residential mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, excluding accrued interest, year one 31 595
Financing receivable, excluding accrued interest, year two 732 974
Financing receivable, excluding accrued interest, year three 968 570
Financing receivable, excluding accrued interest, year four 524 616
Financing receivable, excluding accrued interest, year five 600 2,129
Prior 3,361 1,384
Total 6,216 6,268
720 - 779 | Residential mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, excluding accrued interest, year one 68 1,044
Financing receivable, excluding accrued interest, year two 1,155 1,740
Financing receivable, excluding accrued interest, year three 1,638 926
Financing receivable, excluding accrued interest, year four 859 529
Financing receivable, excluding accrued interest, year five 498 509
Prior 1,021 543
Total 5,239 5,291
660 - 719 | Residential mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, excluding accrued interest, year one 16 287
Financing receivable, excluding accrued interest, year two 311 578
Financing receivable, excluding accrued interest, year three 553 292
Financing receivable, excluding accrued interest, year four 261 180
Financing receivable, excluding accrued interest, year five 159 125
Prior 482 349
Total 1,782 1,811
600 - 659 | Residential mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, excluding accrued interest, year one 0 107
Financing receivable, excluding accrued interest, year two 0 54
Financing receivable, excluding accrued interest, year three 0 17
Financing receivable, excluding accrued interest, year four 9 28
Financing receivable, excluding accrued interest, year five 24 15
Prior 166 158
Total 199 379
Less than 600 | Residential mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, excluding accrued interest, year one 0 0
Financing receivable, excluding accrued interest, year two 0 0
Financing receivable, excluding accrued interest, year three 0 5
Financing receivable, excluding accrued interest, year four 8 12
Financing receivable, excluding accrued interest, year five 19 7
Prior 76 66
Total $ 103 $ 90