VIE (Classifications of Consolidated VIE Assets, Liabilities and Noncontrolling Interest Included in the Bancorp's Consolidated Balance Sheets) (Detail) - USD ($) $ in Millions		Sep. 30, 2018		Jun. 30, 2018	Dec. 31, 2017		Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Assets
Cash and due from banks		$ 2,100			$ 2,514		$ 2,205		$ 2,392
Other short-term investments	[1]	1,429			2,753
Commercial mortgage loans		6,695			6,604
Automobile loans		9,002			9,112
ALLL		(1,091)	[1]	$ (1,077)	(1,196)	[1]	$ (1,205)	$ (1,226)	$ (1,253)
Other assets		6,604			6,975
Liabilities
Other liabilities	[1]	2,448			2,144
Long-term debt	[1]	14,460			14,904
Noncontrolling interests		20			20
Variable Interest Entity, Primary Beneficiary
Assets
Other short-term investments		41			62
Commercial mortgage loans		20			20
Automobile loans		773			1,277
ALLL		(4)			(6)
Other assets		5			7
Total Assets		835			1,360
Liabilities
Other liabilities		1			2
Long-term debt		710			1,190
Total liabilities		711			1,192
Noncontrolling interests		20			20
Variable Interest Entity, Primary Beneficiary | Automobile Loans
Assets
Other short-term investments		41			62
Commercial mortgage loans		0			0
Automobile loans		773			1,277
ALLL		(4)			(6)
Other assets		5			7
Total Assets		815			1,340
Liabilities
Other liabilities		1			2
Long-term debt		710			1,190
Total liabilities		711			1,192
Noncontrolling interests		0			0
Variable Interest Entity, Primary Beneficiary | Fifth Third Community Development Corporation Investments
Assets
Other short-term investments		0			0
Commercial mortgage loans		20			20
Automobile loans		0			0
ALLL		0			0
Other assets		0			0
Total Assets		20			20
Liabilities
Other liabilities		0			0
Long-term debt		0			0
Total liabilities		0			0
Noncontrolling interests		$ 20			$ 20

[1] Includes $ 41 and $ 62 of other short-term investments , $ 793 and $ 1,297 of portfolio loans and leases, $ (4) and $ (6) of ALLL, $ 5 and $ 7 of other assets, $ 1 and $ 2 of other liabilities, and $ 710 and $ 1,190 of long-term debt from consolidated VIEs that are included in their respe ctive captions above at September 30, 2018 and December 31, 2017 , respectively. For further information refer to Note 10 .