v3.26.3
Lending Activities - Credit quality of residential mortgages (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Financing Receivable, Credit Quality Indicator [Line Items]    
Total $ 55,199 $ 55,208
Residential mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, excluding accrued interest, year one 220 2,033
Financing receivable, excluding accrued interest, year two 2,140 3,346
Financing receivable, excluding accrued interest, year three 3,061 1,810
Financing receivable, excluding accrued interest, year four 1,585 1,365
Financing receivable, excluding accrued interest, year five 1,262 2,785
Prior 4,991 2,500
Total 13,259 13,839
Residential mortgages | Consumer Borrower    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 7,200 7,800
780 and greater | Residential mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, excluding accrued interest, year one 75 595
Financing receivable, excluding accrued interest, year two 615 974
Financing receivable, excluding accrued interest, year three 888 570
Financing receivable, excluding accrued interest, year four 492 616
Financing receivable, excluding accrued interest, year five 585 2,129
Prior 3,288 1,384
Total 5,943 6,268
720 - 779 | Residential mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, excluding accrued interest, year one 116 1,044
Financing receivable, excluding accrued interest, year two 1,226 1,740
Financing receivable, excluding accrued interest, year three 1,636 926
Financing receivable, excluding accrued interest, year four 828 529
Financing receivable, excluding accrued interest, year five 487 509
Prior 1,001 543
Total 5,294 5,291
660 - 719 | Residential mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, excluding accrued interest, year one 29 287
Financing receivable, excluding accrued interest, year two 299 578
Financing receivable, excluding accrued interest, year three 537 292
Financing receivable, excluding accrued interest, year four 248 180
Financing receivable, excluding accrued interest, year five 148 125
Prior 467 349
Total 1,728 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 23 15
Prior 162 158
Total 194 379
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 73 66
Total $ 100 $ 90