v3.26.1
Guarantee Arrangements, Pledged Assets and Repurchase Agreements - Carrying Value and Contractual Amounts of our Sell Protection Credit Derivatives and Major Off-Balance Sheet Guarantee Arrangements (Detail) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Guarantor Obligations [Line Items]    
Total, Carrying Value $ 64 $ 61
Credit derivatives, Notional/Maximum Exposure to Loss 8,109 9,425
Total, Notional/Maximum Exposure to Loss 18,848 15,865
Credit derivatives    
Guarantor Obligations [Line Items]    
Credit derivatives, Carrying Value 64 61
Credit derivatives, Notional/Maximum Exposure to Loss 7,910 6,560
Financial standby letters of credit, net of participations    
Guarantor Obligations [Line Items]    
Standby letters of credit, Carrying Value 0 0
Standby letters of credit, Notional/Maximum Exposure to Loss 6,028 5,206
Performance standby letters of credit, net of participations    
Guarantor Obligations [Line Items]    
Standby letters of credit, Carrying Value 0 0
Standby letters of credit, Notional/Maximum Exposure to Loss 4,910 4,099
Affiliated Entity | Credit derivatives    
Guarantor Obligations [Line Items]    
Credit derivatives, Notional/Maximum Exposure to Loss 1,200 677
Affiliated Entity | Financial and performance standby letters of credit    
Guarantor Obligations [Line Items]    
Standby letters of credit, Notional/Maximum Exposure to Loss $ 1,807 $ 1,682