Credit Quality (Summary of Average Impaired Loans and Leases and Interest Income by Class) (Detail) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2016		Sep. 30, 2015
Financing Receivable, Impaired
Average Recorded Investment	$ 1,973		$ 2,022		$ 1,963		$ 2,120
Interest Income Recognized	16		17		45		55
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Impaired
Average Recorded Investment	725		635		685		696
Interest Income Recognized	4		5		8		17
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Impaired
Average Recorded Investment	62	[1]	84	[2]	66	[1]	98	[2]
Interest Income Recognized	0	[1]	0	[2]	1	[1]	1	[2]
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Impaired
Average Recorded Investment	139		210		152		236
Interest Income Recognized	2		2		4		5
Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Impaired
Average Recorded Investment	0		35		3		49
Interest Income Recognized	0		0		0		1
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Impaired
Average Recorded Investment	7		6		6		6
Interest Income Recognized	0		0		0		0
Residential Mortgage Loans
Financing Receivable, Impaired
Average Recorded Investment	651		611		646		576
Interest Income Recognized	6		6		19		17
Consumer Portfolio Segment | Home Equity
Financing Receivable, Impaired
Average Recorded Investment	318		355		330		366
Interest Income Recognized	3		3		9		10
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Impaired
Average Recorded Investment	16		21		18		23
Interest Income Recognized	0		0		0		0
Consumer Portfolio Segment | Credit Card
Financing Receivable, Impaired
Average Recorded Investment	55		65		57		70
Interest Income Recognized	$ 1		$ 1		$ 4		$ 4

[1] (a) Excludes five restructured loans associated with a consolidated VIE in which the Bancorp has no continuing credit risk due to the risk being assumed by a third party, with an average recorded investment of $ 27 and an immaterial amount of interest income recognized for both the three and nine months ended September 30, 2016 .

[2] (a) Excludes five restructured loans associated with a consolidated VIE in which the Bancorp has no continuing credit risk due to the risk being assumed by a third party, with an average recorded investment of $ 28 and an immaterial amount of interest income recognized for both the three and nine months ended September 30, 2015 .