Credit Quality (Summary of Average Impaired Loans and Leases and Interest Income by Class) (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Impaired
Average Recorded Investment		$ 1,946	$ 2,062	$ 3,061
Interest Income Recognized		58	74	119
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Impaired
Average Recorded Investment		691	663	786
Interest Income Recognized		10	21	25
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-Occupied
Financing Receivable, Impaired
Average Recorded Investment	[1]	63	92	149
Interest Income Recognized	[1]	1	2	4
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Impaired
Average Recorded Investment		139	224	268
Interest Income Recognized		5	7	8
Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Impaired
Average Recorded Investment		3	41	92
Interest Income Recognized		0	1	2
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Impaired
Average Recorded Investment		5	5	13
Interest Income Recognized		0	0	0
Residential Portfolio Segment
Financing Receivable, Impaired
Average Recorded Investment		647	586	1,273
Interest Income Recognized		25	23	54
Consumer Portfolio Segment | Home Equity
Financing Receivable, Impaired
Average Recorded Investment		325	361	394
Interest Income Recognized		12	13	20
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Impaired
Average Recorded Investment		17	22	24
Interest Income Recognized		0	1	1
Consumer Portfolio Segment | Credit Card
Financing Receivable, Impaired
Average Recorded Investment		56	68	62
Interest Income Recognized		$ 5	$ 6	$ 5

[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 $ 26 , $ 27 and $28 for the years ended December 31, 2016 , 2015 and 2014 , respectively . A n immaterial amount of interest income was recognized during the years ended December 31, 2016 , 2015 and 2014 .