Classifications of Consolidated VIE Assets, Liabilities and Noncontrolling Interest Included in the Bancorp's Consolidated Balance Sheets (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014	Dec. 31, 2013
Assets
Cash and due from banks	$ 2,920	[1]	$ 3,091	[1]	$ 3,153	$ 3,178
Commercial mortgage loans	7,209		7,399
Automobile loans	11,873		12,037
ALLL	(1,300)	[1]	(1,322)	[1]	(1,483)	(1,582)
Other assets	8,638	[1]	8,241	[1]
Liabilities
Other liabilities	3,504	[1]	2,642	[1]
Long-term debt	14,055	[1]	14,967	[1]
Noncontrolling interests	40		39
Variable Interest Entity, Primary Beneficiary
Assets
Cash and due from banks	176		179
Commercial mortgage loans	48		47
Automobile loans	2,900		3,331
ALLL	(23)		(22)
Other assets	26		25
Total Assets	3,127		3,560
Liabilities
Other liabilities	4		5
Long-term debt	2,983		3,434
Total liabilities	2,987		3,439
Noncontrolling interests	40		39
Variable Interest Entity, Primary Beneficiary | Automobile Loan Securitizations
Assets
Cash and due from banks	175		178
Automobile loans	2,900		3,331
ALLL	(12)		(11)
Other assets	24		23
Total Assets	3,087		3,521
Liabilities
Other liabilities	4		5
Long-term debt	2,983		3,434
Total liabilities	2,987		3,439
Variable Interest Entity, Primary Beneficiary | Fifth Third Community Development Corporation Investments
Assets
Cash and due from banks	1		1
Commercial mortgage loans	48		47
ALLL	(11)		(11)
Other assets	2		2
Total Assets	40		39
Liabilities
Noncontrolling interests	$ 40		$ 39

[1] Includes $176 and $179 of cash and due from banks, $48 and $47 of commercial mortgage loans, $2,900 and $3,331 of automobile loans, $(23) and $(22) of ALLL, $26 and $25 of other assets, $4 and $5 of other liabilities, and $2,983 and $3,434 of long-term debt from consolidated VIEs that are included in their respective captions above at March 31, 2015 and December 31, 2014, respectively. For further information refer to Note 10.