v3.25.1
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
Mar. 31, 2025
Dec. 31, 2024
Guarantor Obligations [Line Items]    
Total, Carrying Value $ 190 $ 191
Credit derivatives, Notional/Maximum Exposure to Loss 4,459 5,521
Total, Notional/Maximum Exposure to Loss 16,742 15,428
Sell-protection Credit Derivatives    
Guarantor Obligations [Line Items]    
Credit derivatives, Carrying Value 190 191
Credit derivatives, Notional/Maximum Exposure to Loss 8,092 6,827
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 5,300 5,337
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 3,350 3,264
Affiliated Entity | Sell-protection Credit Derivatives    
Guarantor Obligations [Line Items]    
Credit derivatives, Notional/Maximum Exposure to Loss 3,254 2,797
Affiliated Entity | Financial and performance standby letters of credit    
Guarantor Obligations [Line Items]    
Standby letters of credit, Notional/Maximum Exposure to Loss $ 1,563 $ 1,590