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Accounting for Transfers and Servicing of Financial Assets and Variable Interest Entities (Tables)
3 Months Ended
Mar. 31, 2020
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,
2020
    
December 31,
2019
 
Investment carrying amount
  $ 6,147      $ 6,148  
Unfunded capital and other commitments
    2,833        2,938  
Maximum exposure to loss
    12,453        12,118