Credit Quality (Summary of the Bancorp's Nonperforming Loans and Leases by Class) (Parenthetical) (Detail) - USD ($) $ in Millions		Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Modifications
Loans held for sale	[1]	$ 751	$ 903
OREO and other repossessed personal property		84	155
Portfolio loans and leases	[2],[3]	92,098	92,582
Variable Interest Entity, Primary Beneficiary
Financing Receivable, Modifications
Portfolio loans and leases		1,216	2,537
Commercial Portfolio Segment
Financing Receivable, Modifications
Portfolio loans and leases		56,452	56,156
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-Occupied | Variable Interest Entity, Primary Beneficiary
Financing Receivable, Modifications
Restructured nonaccrual loans and leases		19	20
Nonperforming Financing Receivable
Financing Receivable, Modifications
Loans held for sale		13	12
Nonperforming Financing Receivable | Government Insured | Commercial Portfolio Segment
Financing Receivable, Modifications
Restructured nonaccrual loans and leases		1	2
Nonperforming Financing Receivable | Government Insured | Commercial Portfolio Segment | Small Business Administration [Member]
Financing Receivable, Modifications
Portfolio loans and leases		$ 4	$ 6

[1] Includes $ 686 and $ 519 of residential mortgage loans held for sale measured at fair value at December 31, 2016 and 2015 , respectively.

[2] Includes $ 143 and $ 167 of residential mortgage loans measured at fair value at December 31, 2016 and 2015 , respectively.

[3] Includes $ 85 and $ 152 of cash and due from banks, $ 1,216 and $ 2,537 of portfolio loans and leases, $ (26) and $ (28) of ALLL, $ 9 and $ 14 of other assets, $ 3 and $ 3 of other liabilities and $ 1,094 and $ 2,487 of long-term debt from consolidated VIEs that are included in their respective captions above at December 31, 2016 and 2015 , respectively. For further information, refer to Note 11.