Credit Quality (Summary of the Credit Risk Profile of the Bancorp's Commercial Portfolio Segment by Class) (Detail) - USD ($) $ in Millions	Jun. 30, 2016		Dec. 31, 2015
Financing Receivable, Modifications
Total loans and leases	$ 93,755	[1],[2]	$ 92,415	[3]
Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	58,117		56,156
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	43,558		42,131
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Modifications
Total loans and leases	3,522		3,659
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Modifications
Total loans and leases	3,353		3,298
Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Modifications
Total loans and leases	3,706		3,214
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	3,978		3,854
Pass | Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	54,077		52,130
Pass | Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	39,995		38,756
Pass | Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Modifications
Total loans and leases	3,263		3,344
Pass | Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Modifications
Total loans and leases	3,220		3,105
Pass | Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Modifications
Total loans and leases	3,705		3,201
Pass | Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	3,894		3,724
Special Mention | Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	1,771		1,917
Special Mention | Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	1,588		1,633
Special Mention | Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Modifications
Total loans and leases	102		124
Special Mention | Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Modifications
Total loans and leases	30		63
Special Mention | Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Modifications
Total loans and leases	1		4
Special Mention | Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	50		93
Substandard | Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	2,269		2,109
Substandard | Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	1,975		1,742
Substandard | Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Modifications
Total loans and leases	157		191
Substandard | Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Modifications
Total loans and leases	103		130
Substandard | Commercial Portfolio Segment | Commercial Construction Loans
Financing Receivable, Modifications
Total loans and leases			9
Substandard | Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	$ 34		$ 37

[1] Excludes $ 154 of residential mortgage loans measured at fair value at June 30, 2016 .

[2] Excludes $ 154 of residential mortgage loans measured at fair value, and includes $ 818 of leveraged leases, net of unearned income at June 30, 2016 .

[3] Excludes $ 167 of residential mortgage loans measured at fair value, and includes $ 801 of leveraged leases, net of unearned income at December 31, 2015 .