v3.26.1
Loans - Delinquency Ratio for Consumer Loan (Detail) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Financing Receivable, Credit Quality Indicator [Line Items]    
Total $ 62,103 $ 59,894
Loans carried at lower of amortized cost or fair value of collateral less cost to sell 85 57
Consumer loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 20,432 20,550
Loans in process of foreclosure 63 30
Consumer loans | Residential mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Current year 1,363 3,203
One year prior to current year 2,820 2,578
Two years prior to current year 2,180 1,387
Three years prior to current year 1,245 2,110
Four years prior to current year 2,056 3,673
Prior 9,920 6,838
Total 19,584 19,789
Consumer loans | Current - 59 days past due | Residential mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Current year 1,363 3,203
One year prior to current year 2,817 2,575
Two years prior to current year 2,179 1,378
Three years prior to current year 1,239 2,100
Four years prior to current year 2,047 3,673
Prior 9,792 6,723
Total 19,437 19,652
Consumer loans | 60 days or more past due | Residential mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Current year 0 0
One year prior to current year 3 3
Two years prior to current year 1 9
Three years prior to current year 6 10
Four years prior to current year 9 0
Prior 128 115
Total $ 147 $ 137