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, 2018		Dec. 31, 2017
Total loans and leases		$ 95,086	[1]	$ 91,833	[2]
Home Equity | Consumer Portfolio Segment
Total loans and leases		6,402		7,014
Automobile Loans | Consumer Portfolio Segment
Total loans and leases		8,976		9,112
Credit Card | Consumer Portfolio Segment
Total loans and leases		2,470		2,299
Other Consumer Loans and Leases | Consumer Portfolio Segment
Total loans and leases		2,342		1,559
Performing Financing Receivable
Total loans and leases	[3]	35,395		35,307
Performing Financing Receivable | Residential Mortgage | Residential Portfolio Segment
Total loans and leases	[3]	15,303		15,424
Performing Financing Receivable | Home Equity | Consumer Portfolio Segment
Total loans and leases		6,332		6,940
Performing Financing Receivable | Automobile Loans | Consumer Portfolio Segment
Total loans and leases		8,975		9,111
Performing Financing Receivable | Credit Card | Consumer Portfolio Segment
Total loans and leases		2,444		2,273
Performing Financing Receivable | Other Consumer Loans and Leases | Consumer Portfolio Segment
Total loans and leases		2,341		1,559
Nonperforming Financing Receivable
Total loans and leases	[3]	120		131
Nonperforming Financing Receivable | Residential Mortgage | Residential Portfolio Segment
Total loans and leases	[3]	22		30
Nonperforming Financing Receivable | Home Equity | Consumer Portfolio Segment
Total loans and leases		70		74
Nonperforming Financing Receivable | Automobile Loans | Consumer Portfolio Segment
Total loans and leases		1		1
Nonperforming Financing Receivable | Credit Card | Consumer Portfolio Segment
Total loans and leases		26		26
Nonperforming Financing Receivable | Other Consumer Loans and Leases | Consumer Portfolio Segment
Total loans and leases		$ 1		$ 0

[1] Excludes $ 179 of residential mortgage loans measured at fair value at December 31, 2018 .

[2] Excludes $ 137 of residential mortgage loans measured at fair value at December 31, 2017 .

[3] (a) Excludes $ 179 and $ 137 of residential mortgage loans measured at fair value at December 31, 2018 and 2017 , respectively