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Commitments, Contingencies And Guarantees (Tables)
 12 Months Ended
Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]  
Schedule Of Off-Balance Sheet Instruments Commitments The following table summarizes these commitments at December 31:
(In thousands)20202019
Commitments to extend credit:
Credit card$4,972,104 $5,063,166 
Other8,033,222 6,123,264 
Standby letters of credit, net of participations357,087 377,338 
Commercial letters of credit3,117 7,050