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

12 Months Ended

Dec. 31, 2016

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)	2016		2015
Investment carrying amount	$	5,009	$	5,257
Unfunded capital and other commitments		2,477		2,499
Maximum exposure to loss		10,373		9,436