Summary of the Credit Risk Profile of the Bancorp's Commercial Portfolio Segment by Class (Detail) - USD ($) $ in Millions	Jun. 30, 2015		Dec. 31, 2014
Financing Receivable, Modifications
Total loans and leases	$ 92,525	[1]	$ 89,976	[2]
Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	56,540		53,953
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	42,800		40,765
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Modifications
Total loans and leases	3,829		3,834
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Modifications
Total loans and leases	3,321		3,565
Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications
Total loans and leases	2,709		2,069
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	3,881		3,720
Pass | Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	52,799		50,285
Pass | Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	39,780		38,013
Pass | Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Modifications
Total loans and leases	3,485		3,430
Pass | Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Modifications
Total loans and leases	3,058		3,198
Pass | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications
Total loans and leases	2,671		1,966
Pass | Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	3,805		3,678
Special Mention | Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	1,502		1,639
Special Mention | Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	1,285		1,352
Special Mention | Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Modifications
Total loans and leases	115		137
Special Mention | Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Modifications
Total loans and leases	39		76
Special Mention | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications
Total loans and leases	18		65
Special Mention | Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	45		9
Risk Level, Substandard | Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	2,228		2,022
Risk Level, Substandard | Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	1,735		1,400
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Modifications
Total loans and leases	229		267
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Modifications
Total loans and leases	213		284
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications
Total loans and leases	20		38
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	31		33
Risk Level, Doubtful | Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	11		7
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Modifications
Total loans and leases	$ 11		$ 7

[1] Excludes $178 of residential mortgage loans measured at fair value.

[2] Excludes $108 of residential mortgage loans measured at fair value.