Other Assets - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015		Dec. 31, 2013	Jun. 30, 2014	[1]	Sep. 30, 2013	[1]	Jun. 30, 2013	[1]	Dec. 31, 2012	[1]	Mar. 31, 2012	Jun. 30, 2009
Other assets
Percentage of Vantiv Holding, LLC sold to Advent for cash and warrants													51.00%
Private Equity Fund Impairment	$ 1		$ 4
Vantiv Holding, LLC
Other assets
Percentage of Vantiv Holding, LLC sold to Advent for cash and warrants													51.00%
Percentage of ownership under the equity method of accounting	18.00%	[1]		23.00%		25.00%		28.00%		33.00%		39.00%	49.00%

[1] The Bancorp’s remaining investment in Vantiv Holding, LLC of $360 as of December 31, 2015 was accounted for as an equity method investment in the Bancorp’s Consolidated Financial Statements.