Credit Quality (Summary of the Bancorp's Nonperforming Loans and Leases by Class) (Detail) - USD ($) $ in Millions		Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Modifications
Nonaccrual portfolio loans and leases	[1],[2]	$ 452	$ 437
OREO and other repossessed property		52	52
Nonperforming portfolio assets	[1],[2]	504	489
Commercial Portfolio Segment
Financing Receivable, Modifications
Nonaccrual portfolio loans and leases		322	306
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Nonaccrual portfolio loans and leases		299	276
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Modifications
Nonaccrual portfolio loans and leases		11	19
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Modifications
Nonaccrual portfolio loans and leases		4	7
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Nonaccrual portfolio loans and leases		8	4
Residential Mortgage Loans
Financing Receivable, Modifications
Nonaccrual portfolio loans and leases		28	30
Consumer Portfolio Segment
Financing Receivable, Modifications
Nonaccrual portfolio loans and leases		102	101
Consumer Portfolio Segment | Home Equity
Financing Receivable, Modifications
Nonaccrual portfolio loans and leases		74	74
Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Modifications
Nonaccrual portfolio loans and leases		1	1
Consumer Portfolio Segment | Credit Card
Financing Receivable, Modifications
Nonaccrual portfolio loans and leases		26	26
Consumer Portfolio Segment | Other Consumer Loans
Financing Receivable, Modifications
Nonperforming portfolio assets		$ 1	$ 0

[1] Excludes $ 24 a nd $ 6 of nonaccrual loans held for sale at March 31, 2018 and December 31, 2017 , respectively.

[2] Includes $ 5 and $ 3 of nonaccrual government insured commercial loans whose repayments are insured by the SBA a t March 31, 2018 and Dec ember 31, 2017 , respectively, of which $ 2 and $ 3 are restructured nonaccrual government insured commercial loans at both March 31, 2018 and December 31, 2017 , respectively .