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Accounting for Transfers and Servicing of Financial Assets and Variable Interest Entities (Tables)
3 Months Ended
Mar. 31, 2021
Accounting Policies [Abstract]  
Summary of Investments in Community Development and Tax-advantaged VIEs
The following table provides a summary of investments in community development and
tax-advantaged
VIEs that the Company has not consolidated:
 
(Dollars in Millions)   March 31,
2021
     December 31,
2020
 
Investment carrying amount
  $ 5,161      $ 5,378  
Unfunded capital and other commitments
    2,236        2,334  
Maximum exposure to loss
    10,903        11,219