Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of Commitments and Contingencies

The following table summarizes certain commitments and contingencies. Refer to Note 13. Fair Value Disclosures for amounts related to off-balance sheet financial instruments.

(Dollars in millions)	Mar 31, 2018		Dec 31, 2017
Investments in affordable housing projects:
Carrying amount	$	2,018	$	1,948
Amount of future funding commitments included in carrying amount	935		928
Lending exposure	526		561
Tax credits subject to recapture	455		471
Private equity investments	469		471
Future funding commitments to private equity investments	134		143

Schedule of Pledged Assets

The following table provides the total carrying amount of pledged assets by asset type, of which the majority are pursuant to agreements that do not permit the other party to sell or repledge the collateral. Assets related to employee benefit plans are excluded from the following table.

(Dollars in millions)	Mar 31, 2018		Dec 31, 2017
Pledged securities	$	13,257	$	14,636
Pledged loans	73,998		74,718