Credit Quality (Summary of Average Impaired Loans and Leases and Interest Income by Class) (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Impaired
Average Recorded Investment		$ 1,469	$ 1,677	$ 1,946
Interest Income Recognized		60	52	58
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Impaired
Average Recorded Investment		373	579	691
Interest Income Recognized		15	10	10
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-Occupied
Financing Receivable, Impaired
Average Recorded Investment	[1]	15	35	63
Interest Income Recognized	[1]	0	0	1
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Impaired
Average Recorded Investment		24	61	139
Interest Income Recognized		0	1	5
Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Impaired
Average Recorded Investment		0	0	3
Interest Income Recognized		0	0	0
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Impaired
Average Recorded Investment		18	3	5
Interest Income Recognized		0	0	0
Residential Portfolio Segment
Financing Receivable, Impaired
Average Recorded Investment		743	657	647
Interest Income Recognized		28	25	25
Consumer Portfolio Segment | Home Equity
Financing Receivable, Impaired
Average Recorded Investment		244	281	325
Interest Income Recognized		12	12	12
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Impaired
Average Recorded Investment		8	11	17
Interest Income Recognized		0	0	0
Consumer Portfolio Segment | Credit Card
Financing Receivable, Impaired
Average Recorded Investment		44	50	56
Interest Income Recognized		$ 5	$ 4	$ 5

[1] Excludes five restructured loans associated with a consolid ated VIE in which the Bancorp had no continuing credit risk due to the risk being assumed by a third party, with an average recorded investment of $ 13 and $ 26 for t he years ended December 31, 2017 and 2016, respectively. An immaterial amount of interest income was recognized during both t he years ended December 31, 2017 and 2016. Refer to Note 10 for further discus sion on the deconsolidation of the VIE associated with these loans in the third qu arter of 2017.