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Commitments, Contingencies and Guarantees (Tables)
9 Months Ended
Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]  
Credit Risk Of Off- Balance Sheet Financial Instruments By Contractual Amounts
Credit risk associated with these instruments is represented by the contractual amounts indicated in the following table:
September 30, 2023December 31, 2022
 (In millions)
Unused commitments to extend credit$64,610 $65,460 
Standby letters of credit1,934 1,962 
Commercial letters of credit75 75 
Liabilities associated with standby letters of credit27 35 
Assets associated with standby letters of credit29 37 
Reserve for unfunded credit commitments130118