v3.26.1
Lending Activities - Credit quality of residential mortgages (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Financing Receivable, Credit Quality Indicator [Line Items]    
Total $ 55,106 $ 55,208
Residential mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, excluding accrued interest, year one 292 2,033
Financing receivable, excluding accrued interest, year two 2,016 3,346
Financing receivable, excluding accrued interest, year three 3,267 1,810
Financing receivable, excluding accrued interest, year four 1,754 1,365
Financing receivable, excluding accrued interest, year five 1,341 2,785
Prior 5,227 2,500
Total 13,897 13,839
Residential mortgages | Consumer Borrower    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 7,700 7,800
780 and greater | Residential mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, excluding accrued interest, year one 71 595
Financing receivable, excluding accrued interest, year two 694 974
Financing receivable, excluding accrued interest, year three 1,003 570
Financing receivable, excluding accrued interest, year four 556 616
Financing receivable, excluding accrued interest, year five 614 2,129
Prior 3,438 1,384
Total 6,376 6,268
720 - 779 | Residential mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, excluding accrued interest, year one 181 1,044
Financing receivable, excluding accrued interest, year two 1,037 1,740
Financing receivable, excluding accrued interest, year three 1,695 926
Financing receivable, excluding accrued interest, year four 905 529
Financing receivable, excluding accrued interest, year five 519 509
Prior 1,050 543
Total 5,387 5,291
660 - 719 | Residential mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, excluding accrued interest, year one 40 287
Financing receivable, excluding accrued interest, year two 285 578
Financing receivable, excluding accrued interest, year three 569 292
Financing receivable, excluding accrued interest, year four 275 180
Financing receivable, excluding accrued interest, year five 164 125
Prior 492 349
Total 1,825 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 169 158
Total 202 379
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 9 12
Financing receivable, excluding accrued interest, year five 20 7
Prior 78 66
Total $ 107 $ 90