XML 43 R29.htm IDEA: XBRL DOCUMENT v3.21.2
Accounting for Transfers and Servicing of Financial Assets and Variable Interest Entities (Tables)
6 Months Ended
Jun. 30, 2021
Accounting Policies [Abstract]  
Summary of Investments in Community Development and Tax-advantaged VIEs
(Dollars in Millions)  
June 30,
2021
     December 31,
2020
 
Investment carrying amount
  $ 5,012      $ 5,378  
Unfunded capital and other commitments
    2,257        2,334  
Maximum exposure to loss
    10,579        11,219