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Accounting for Transfers and Servicing of Financial Assets and Variable Interest Entities (Tables)
9 Months Ended
Sep. 30, 2023
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)  
September 30,
2023
     December 31,
2022
 
Investment carrying amount
  $ 6,488      $ 5,452  
Unfunded capital and other commitments
    3,186        2,416  
Maximum exposure to loss
    10,058        9,761