Common, Preferred, and Treasury Stock - Additional Information (Detail) (USD $)	3 Months Ended					12 Months Ended								1 Months Ended		12 Months Ended			12 Months Ended						6 Months Ended			0 Months Ended	1 Months Ended		1 Months Ended		3 Months Ended			4 Months Ended	5 Months Ended		8 Months Ended	10 Months Ended	11 Months Ended	10 Months Ended	11 Months Ended	12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012		Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2013 Series I Preferred Stock	Dec. 31, 2013 Series H Preferred Stock	Dec. 31, 2012 Series G Preferred Stock	Jan. 25, 2011 Common Stock	Feb. 04, 2011 Common Stock	Dec. 31, 2011 Common Stock	Jan. 24, 2011 Common Stock	Jul. 02, 2013 Common Stock Series G Preferred Stock	Dec. 31, 2013 Preferred Stock	Dec. 31, 2011 Preferred Stock	Dec. 04, 2013 Preferred Stock Series I Preferred Stock	Dec. 04, 2013 Preferred Stock Series I Preferred Stock Depositary Shares	May 13, 2013 Preferred Stock Series H Preferred Stock	May 13, 2013 Preferred Stock Series H Preferred Stock Depositary Shares	Jul. 02, 2013 Preferred Stock Series G Preferred Stock	Dec. 31, 2008 Preferred Stock Series G Preferred Stock	Jul. 02, 2013 Preferred Stock Series G Preferred Stock Depositary Shares	Mar. 16, 2011 Preferred Stock Series F Preferred Stock	Feb. 02, 2011 Preferred Stock Series F Preferred Stock	Dec. 31, 2008 Preferred Stock Series F Preferred Stock	Jan. 28, 2013 Treasury Stock	Feb. 13, 2013 Treasury Stock	Sep. 30, 2013 Treasury Stock	Jun. 30, 2013 Treasury Stock	Mar. 19, 2013 Treasury Stock	Apr. 26, 2012 Treasury Stock	May 21, 2013 Treasury Stock	Jun. 01, 2012 Treasury Stock	Aug. 28, 2012 Treasury Stock	Oct. 24, 2012 Treasury Stock	Nov. 19, 2013 Treasury Stock	Nov. 09, 2012 Treasury Stock	Dec. 10, 2013 Treasury Stock	Dec. 19, 2012 Treasury Stock	Mar. 14, 2013 Treasury Stock
Preferred stock, liquidation preference											$ 25,000	$ 25,000	$ 25,000								$ 25,000		$ 25,000			$ 25,000				$ 25,000
Preferred stock, convertible into shares of common stock													2,159.8272												2,159.8272	2,159.8272
Preferred stock, conversion price per share of common stock																										$ 11.575
Preferred stock, shares authorized											18,000	24,000	16,450								18,000	18,000,000	24,000	600,000			4,110,500		136,320
Value of Series F shares purchased by U.S. Treasury																														$ 3,400,000,000
Number of Series F shares purchased by U.S. Treasury																														136,320
Warrants to purchase Bancorp's common stock																														43,617,747
Warrants to purchase Bancorp's common stock, exercise price																														$ 11.72
Preferred Stock, Value, Issued			398,000,000	[1]		1,034,000,000	[1]	398,000,000	[1]												441,000,000		593,000,000							3,200,000,000
Proceeds from issuance of the Series F preferred stock allocated to warrants																														239,000,000
Common Stock, Value, Issued			2,051,000,000	[2]		2,051,000,000	[2]	2,051,000,000	[2]					1,700,000,000
Common stock issued, shares																		35,511,740
Successful completion of at-the-market offering of common shares, average price per share														$ 14.00			$ 14.00
Number of common shares issued in exchange for depositary shares																122,388,393
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period						190,000		205,000		96,000
Repurchase Of Warrants During Period Value										280,000,000																		280,000,000
Accretion Of Preferred Stock And Dividends Declared																				153,000,000									153,000,000
Stock redeemed or called during period, shares														121,428,572					(16,450)	(136,320)					16,442						6,953,028					4,838,710	25,035,519		21,531,100		8,538,423	7,710,761	19,084,195	6,267,410
Shares acquired for treasury						(1,320,000,000)		(650,000,000)																							125,000,000					75,000,000	539,000,000		350,000,000		200,000,000	125,000,000	456,000,000	100,000,000
Gain on sale of Vantiv Holding, LLC	85,000,000	242,000,000	157,000,000		115,000,000																												55,000,000	157,000,000
Incremental common shares															959,821																849,037	657,914					4,270,250	631,986		1,444,047				127,760
Repurchase Shares Authorized																															100,000,000				100,000,000		100,000,000		100,000,000		100,000,000		100,000,000	100,000,000
Remaining Repurchase Shares Authorized																																							14,000,000
Redemption date																																							August 28, 2012			November 9, 2012		December 19, 2012
Forward contract redemption date																																February 12, 2013						June 1, 2012		October 24, 2012
Issuance of common stock to underwriters														12,142,857
Repurchase Of Common Shares Authorized Under CCAR																															$ 600,000,000								$ 600,000,000						$ 984,000,000

[1] 458,000 shares of undesignated no par value preferred stock are authorized and unissued at December 31, 2013; fixed-to-floating rate non-cumulative Series H perpetual preferred stock with a $25,000 liquidation preference: 24,000 authorized, issued and outstanding at December 31, 2013; fixed-to-floating rate non-cumulative Series I perpetual preferred stock with a $25,000 liquidation preference: 18,000 authorized, issued and outstanding at December 31, 2013 and 8.5% non-cumulative Series G convertible (into 2,159.8272 common shares) perpetual preferred stock with a $25,000 liquidation preference: 46,000 authorized and 16,450 issued and outstanding at December 31, 2012.

[2] Common shares: Stated value $2.22 per share; authorized 2,000,000,000; outstanding at December 31, 2013 – 855,305,745 (excludes 68,586,836 treasury shares) and December 31, 2012 – 882,152,057 (excludes 41,740,524 treasury shares).