Credit Quality (Summary of Average Impaired Loans and Leases and Interest Income by Class) (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Financing Receivable, Impaired
Average Recorded Investment		$ 1,835	$ 1,954
Interest Income Recognized		12	13
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Impaired
Average Recorded Investment		683	645
Interest Income Recognized		1	2
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Impaired
Average Recorded Investment	[1]	43	71
Interest Income Recognized	[1]	0	0
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Impaired
Average Recorded Investment		89	165
Interest Income Recognized		1	1
Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Impaired
Average Recorded Investment		0	7
Interest Income Recognized		0	0
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Impaired
Average Recorded Investment		3	5
Interest Income Recognized		0	0
Residential Mortgage Loans
Financing Receivable, Impaired
Average Recorded Investment		654	642
Interest Income Recognized		6	6
Consumer Portfolio Segment | Home Equity
Financing Receivable, Impaired
Average Recorded Investment		298	340
Interest Income Recognized		3	3
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Impaired
Average Recorded Investment		14	19
Interest Income Recognized		0	0
Consumer Portfolio Segment | Credit Card
Financing Receivable, Impaired
Average Recorded Investment		51	60
Interest Income Recognized		$ 1	$ 1

[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 $ 2 6 and $ 27 at March 31, 2017 and March 31, 2016 , respectively, and an immaterial amount of interest income recognized for the both the three months ended March 31, 2017 and March 31, 2016 .