Number of Shares to be issued upon Exercise of Outstanding Stock-Based Awards and Remaining Shares Available for Future Issuance under all Equity Compensation Plans (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2011
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Number of Shares to be Issued Upon Exercise	11,326
Shares available for future issuance	34,283	[1]
Restricted Stock
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Number of Shares to be Issued Upon Exercise	4,764
Stock Options
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Number of Shares to be Issued Upon Exercise	6,562	[2]
Weighted-Average Exercise Price	59.73	[2]
Employee stock purchase plan
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Shares available for future issuance	9,548	[3]

[1] Under the 2011 Incentive Compensation Plan, 39 million shares plus up to 4.5 million shares from the 2008 Incentive Compensation Plan (the Predecessor Plan) of stock were authorized for issuance as incentive and nonqualified stock options, SARs, restricted stock and restricted stock units, performance units and performance restricted stock awards.

[2] Excludes 1 million outstanding options awarded under plans assumed by the Bancorp in connection with certain mergers and acquisitions. The Bancorp has not made any awards under these plans and will make no additional awards under these plans. The weighted-average exercise price of the outstanding options is $16.31 per share.

[3] Represents remaining shares of Fifth Third common stock under the Bancorp’s 1993 Stock Purchase Plan, as amended and restated, including an additional 1.5 million shares approved by shareholders on March 28, 2007 and an additional 12 million shares approved by shareholders on April 21, 2009.