Classifications of Consolidated VIE Assets, Liabilities and Noncontrolling Interest Included in the Bancorp's Consolidated Balance Sheets (Detail) (USD $) In Millions	Jun. 30, 2011		Mar. 31, 2011	Dec. 31, 2010		Jun. 30, 2010		Mar. 31, 2010	Dec. 31, 2009
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Cash and due from banks	$ 2,380	[1]		$ 2,159	[1]	$ 2,216	[1]		$ 2,318
Other short-term investments	1,370	[1]		1,515	[1]	4,322	[1]
Commercial mortgage loans	10,233	[1]		10,845	[1]	11,481	[1]
Home equity	11,048	[1]		11,513	[1]	11,987	[1]
Automobile loans	11,315	[1]		10,983	[1]	10,285	[1]
Allowance for loan and lease losses	(2,614)	[1],[2]	(2,805)	(3,004)	[1],[3]	(3,693)	[1]	(3,802)	(3,749)
Other assets	8,254	[1]		8,400	[1]	8,144	[1]
Total Assets	110,805			111,007		112,025
Other liabilities	3,282	[1]		2,979	[1]	2,703	[1]
Long-term debt	10,152	[1]		9,558	[1]	10,989	[1]
Total liabilities	98,204			96,927		98,324
Noncontrolling interest	29			29
Variable Interest Entity, Primary Beneficiary
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Cash and due from banks	42			52		74
Other short-term investments	7			7		7
Commercial mortgage loans	29			29
Home equity	231			241		252
Automobile loans	424			648		911
Allowance for loan and lease losses	(11)			(14)		(16)
Other assets	4			7		7
Total Assets	726			970		1,235
Other liabilities	8			12		19
Long-term debt	365			692		996
Total liabilities	373			704		1,015
Noncontrolling interest	29			29
Variable Interest Entity, Primary Beneficiary | Home Equity
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Cash and due from banks	6			7		8
Home equity	231			241		252
Allowance for loan and lease losses	(5)			(5)		(5)
Other assets	1			1		1
Total Assets	233			244		256
Long-term debt	35			133		161
Total liabilities	35			133		161
Variable Interest Entity, Primary Beneficiary | Automobile Loan
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Cash and due from banks	36			45		66
Other short-term investments	7			7		7
Automobile loans	424			648		911
Allowance for loan and lease losses	(5)			(8)		(11)
Other assets	2			5		6
Total Assets	464			697		979
Other liabilities	8			12		19
Long-term debt	330			559		835
Total liabilities	338			571		854
Variable Interest Entity, Primary Beneficiary | Fifth Third Community Development Corporation Investments
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Commercial mortgage loans	29			29
Allowance for loan and lease losses	(1)			(1)
Other assets	1			1
Total Assets	29			29
Noncontrolling interest	$ 29			$ 29

[1] Includes $42, $52, and $74 of cash, $7, $7 and $7 of other short-term investments, $29, $29 and $0 of commercial mortgage loans, $231, $241 and $252 of home equity loans, $424, $648 and $911 of automobile loans, ($11), ($14) and ($16) of ALLL, $4, $7 and $7 of other assets, $8, $12 and $19 of other liabilities and $365, $692 and $996 of long-term debt from consolidated VIEs that are included in their respective captions above at June 30, 2011, December 31, 2010 and June 30, 2010, respectively. See Note 8.

[2] Includes $18 related to leverage leases.

[3] Includes $15 related to leverage leases.