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Guarantees and Contingent Liabilities (Tables)
9 Months Ended
Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]  
Summary of Other Guarantees and Contingent Liabilities
The following table is a summary of other guarantees and contingent liabilities of the Company at September 30, 2020:
 
(Dollars in Millions)   Collateral
Held
     Carrying
Amount
     Maximum
Potential
Future
Payments
 
Standby letters of credit
  $      $ 69      $ 9,838  
Third party borrowing arrangements
                  2  
Securities lending indemnifications
    5,790               5,659  
Asset sales
           75        5,148  (a) 
Merchant processing
    668        203        88,546  
Tender option bond program guarantee
    2,796               2,445  
Other
           74        1,450  
(a)
The maximum potential future payments do not include loan sales where the Company provides standard representation and warranties to the buyer against losses related to loan underwriting documentation defects that may have existed at the time of sale that generally are identified after the occurrence of a triggering event such as delinquency. For these types of loan sales, the maximum potential future payments is generally the unpaid principal balance of loans sold measured at the end of the current reporting period. Actual losses will be significantly less than the maximum exposure, as only a fraction of loans sold will have a representation and warranty breach, and any losses on repurchase would generally be mitigated by any collateral held against the loans.