Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2016

Commitments and Contingencies Disclosure [Abstract]

Schedule of Commitments and Contingencies

	As of / For the Year-To-Date Period Ended
	March 31, 2016		December 31, 2015
	(Dollars in millions)
Letters of credit	$	3,004	$	3,033
Carrying amount of the liability for letters of credit	30		27
Investments in affordable housing and historic building rehabilitation projects:
Carrying amount	1,767		1,629
Amount of future funding commitments included in carrying amount	790		654
Lending exposure	315		292
Tax credits subject to recapture	355		355
Private equity and similar investments	301		289
Future funding commitments to consolidated private equity funds	224		231

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 have been excluded from the following table.

	March 31, 2016		December 31, 2015
	(Dollars in millions)
Pledged securities	$	13,691	$	14,063
Pledged loans	74,061		69,070