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Commitments, Contingencies and Guarantees (Tables)
 9 Months Ended
Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]  
Summary of Commitments
The following table summarizes the Company's commitments.
(Dollars in millions)
 
September 30,
2020
Commitments to extend credit
 
$
37,840

Issued standby and commercial letters of credit
 
4,094

Commitments to enter into forward-starting resale agreements
 
1,349

Other commitments
 
1,831