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Commitments, Contingencies and Guarantees (Tables)
3 Months Ended
Mar. 31, 2025
Commitments and Contingencies Disclosure [Abstract]  
Credit Risk Of Off- Balance Sheet Financial Instruments By Contractual Amounts
March 31, 2025December 31, 2024
 (In millions)
Unused commitments to extend credit$64,347 $63,232 
Standby letters of credit2,140 2,096 
Commercial letters of credit68 58 
Liabilities associated with standby letters of credit34 33 
Assets associated with standby letters of credit36 35 
Reserve for unfunded credit commitments117116