Credit Quality (Summary of the Credit Risk Profile of the Bancorp's Residential Mortgage and Consumer Portfolio Segments by Class) (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Total loans and leases	$ 109,375	$ 95,086
Home Equity | Consumer Portfolio Segment
Total loans and leases	6,083	6,402
Indirect secured consumer loans | Consumer Portfolio Segment
Total loans and leases	11,538	8,976
Credit Card | Consumer Portfolio Segment
Total loans and leases	2,532	2,470
Other Consumer Loans | Consumer Portfolio Segment
Total loans and leases	2,723	2,342
Performing Financing Receivable
Total loans and leases	39,196	35,395
Performing Financing Receivable | Residential Mortgage | Residential Mortgage Loans
Total loans and leases	16,450	15,303
Performing Financing Receivable | Home Equity | Consumer Portfolio Segment
Total loans and leases	5,989	6,332
Performing Financing Receivable | Indirect secured consumer loans | Consumer Portfolio Segment
Total loans and leases	11,531	8,975
Performing Financing Receivable | Credit Card | Consumer Portfolio Segment
Total loans and leases	2,505	2,444
Performing Financing Receivable | Other Consumer Loans | Consumer Portfolio Segment
Total loans and leases	2,721	2,341
Nonperforming Financing Receivable
Total loans and leases	221	120
Nonperforming Financing Receivable | Residential Mortgage | Residential Mortgage Loans
Total loans and leases	91	22
Nonperforming Financing Receivable | Home Equity | Consumer Portfolio Segment
Total loans and leases	94	70
Nonperforming Financing Receivable | Indirect secured consumer loans | Consumer Portfolio Segment
Total loans and leases	7	1
Nonperforming Financing Receivable | Credit Card | Consumer Portfolio Segment
Total loans and leases	27	26
Nonperforming Financing Receivable | Other Consumer Loans | Consumer Portfolio Segment
Total loans and leases	$ 2	$ 1