Investments in Qualified Affordable Housing Tax Credits (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Other noninterest expense
Schedule of Equity Method Investments
Pre-tax investment and impairment losses	[1]	$ 36	$ 34
Applicable income tax expense
Schedule of Equity Method Investments
Tax credits and other benefits		$ (55)	$ (52)

[1] The Bancorp did not recognize impairment losses resulting from the forfeiture or ineligibility of tax credits or other circumstances during three months ended March 31, 2016 and 2015.