Credit Quality (Summary of the Credit Risk Profile of the Bancorp's Residential Mortgage and Consumer Portfolio Segments by Class) (Detail) - USD ($) $ in Millions		Mar. 31, 2018		Dec. 31, 2017
Total loans and leases		$ 91,834	[1],[2]	$ 91,833	[3],[4]
Home Equity | Consumer Portfolio Segment
Total loans and leases		6,757		7,014
Automobile Loans | Consumer Portfolio Segment
Total loans and leases		9,018		9,112
Credit Card | Consumer Portfolio Segment
Total loans and leases		2,188		2,299
Other consumer loans | Consumer Portfolio Segment
Total loans and leases		1,615		1,559
Performing Financing Receivable
Total loans and leases	[5]	34,875		35,307
Performing Financing Receivable | Residential Mortgage | Residential Mortgage Loans
Total loans and leases	[5]	15,399		15,424
Performing Financing Receivable | Home Equity | Consumer Portfolio Segment
Total loans and leases		6,683		6,940
Performing Financing Receivable | Automobile Loans | Consumer Portfolio Segment
Total loans and leases		9,017		9,111
Performing Financing Receivable | Credit Card | Consumer Portfolio Segment
Total loans and leases		2,162		2,273
Performing Financing Receivable | Other consumer loans | Consumer Portfolio Segment
Total loans and leases		1,614		1,559
Nonperforming Financing Receivable
Total loans and leases	[5]	130		131
Nonperforming Financing Receivable | Residential Mortgage | Residential Mortgage Loans
Total loans and leases	[5]	28		30
Nonperforming Financing Receivable | Home Equity | Consumer Portfolio Segment
Total loans and leases		74		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 | Consumer Portfolio Segment
Total loans and leases		$ 1		$ 0

[1] Excludes $ 136 of residential mortgage loans measured at fair value and includes $ 670 of leveraged leases, net of unearned income at March 31, 2018 .

[2] Excludes $ 136 of residential mortgage loans measured at fair value at March 31, 2018 .

[3] Excludes $ 137 of residential mortga ge loans measured at fair value and includes $ 674 of leveraged leases, net of unearned income at December 31, 2017 .

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

[5] (a) Excludes $ 136 and $ 137 of residential mortgage loans measured at fair value at March 31, 2018 and December 31, 2017 , respectively.