VIE (Classifications of Consolidated VIE Assets, Liabilities and Noncontrolling Interest Included in the Bancorp's Consolidated Balance Sheets) (Detail) - USD ($) $ in Millions		Sep. 30, 2017		Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016		Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Assets
Cash and due from banks		$ 2,205	[1]			$ 2,392	[1]	$ 2,164			$ 2,540	[1]
Commercial mortgage loans		6,863				6,899
Automobile loans		9,236				9,983
ALLL		(1,205)	[1],[2]	$ (1,226)	$ (1,226)	(1,253)	[1],[3]	$ (1,272)	$ (1,299)	$ (1,299)	$ (1,272)
Other assets	[1]	7,047				7,844
Liabilities
Other liabilities	[1]	2,516				2,269
Long-term debt	[1]	14,039				14,388
Noncontrolling interests		20				27
Variable Interest Entity, Primary Beneficiary
Assets
Cash and due from banks		116				85
Commercial mortgage loans		20				46
Automobile loans		1,512				1,170
ALLL		(8)				(26)
Other assets		9				9
Total Assets		1,649				1,284
Liabilities
Other liabilities		3				3
Long-term debt		1,491				1,094
Total liabilities		1,494				1,097
Noncontrolling interests		20				27
Variable Interest Entity, Primary Beneficiary | Automobile Loans
Assets
Cash and due from banks		116				84
Commercial mortgage loans		0				0
Automobile loans		1,512				1,170
ALLL		(8)				(6)
Other assets		9				9
Total Assets		1,629				1,257
Liabilities
Other liabilities		3				3
Long-term debt		1,491				1,094
Total liabilities		1,494				1,097
Noncontrolling interests		0				0
Variable Interest Entity, Primary Beneficiary | Fifth Third Community Development Corporation Investments
Assets
Cash and due from banks		0				1
Commercial mortgage loans		20				46
Automobile loans		0				0
ALLL		0				(20)
Other assets		0				0
Total Assets		20				27
Liabilities
Other liabilities		0				0
Long-term debt		0				0
Total liabilities		0				0
Noncontrolling interests		$ 20				$ 27

[1] Includes $ 116 and $ 85 of cash and due from banks, $ 1,532 and $ 1,216 of portfolio loans and leases , $ (8) and $ (26) of ALLL, $ 9 and $ 9 of other assets, $ 3 and $ 3 of other liabilities , and $ 1,491 and $ 1,094 of long-term debt from consolidated VIEs that are included in their respective captions above at September 30, 2017 and December 31, 2016 , respectively. For further information refer to Note 11 .

[2] Includes $ 1 related to leveraged leases at September 30, 2017 .

[3] Includes $ 2 related to leveraged leases at December 31, 2016 .