Accounting for Transfers and Servicing of Financial Assets and Variable Interest Entities (Tables)

12 Months Ended

Dec. 31, 2018

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:

At December 31 (Dollars in Millions)	2018		2017
Investment carrying amount	$	5,823	$	5,660
Unfunded capital and other commitments		2,778		2,770
Maximum exposure to loss		12,360		12,120