Summary of the Credit Risk Profile of the Bancorp's Commercial Portfolio Segment by Class (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Financing Receivable, Modifications
Total loans and leases	$ 91,118	[1]	$ 89,976	[2]
Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	55,349		53,953
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	42,052		40,765
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Modifications
Total loans and leases	3,810		3,834
Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Modifications
Total loans and leases	3,399		3,565
Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications
Total loans and leases	2,302		2,069
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	3,786		3,720
Pass | Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	51,866		50,285
Pass | Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	39,390		38,013
Pass | Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Modifications
Total loans and leases	3,447		3,430
Pass | Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Modifications
Total loans and leases	3,092		3,198
Pass | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications
Total loans and leases	2,217		1,966
Pass | Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	3,720		3,678
Special Mention | Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	1,574		1,639
Special Mention | Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	1,293		1,352
Special Mention | Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Modifications
Total loans and leases	108		137
Special Mention | Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Modifications
Total loans and leases	94		76
Special Mention | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications
Total loans and leases	48		65
Special Mention | Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	31		9
Risk Level, Substandard | Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	1,909		2,022
Risk Level, Substandard | Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	1,369		1,400
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Mortgage Loans, Owner-occupied
Financing Receivable, Modifications
Total loans and leases	255		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	37		38
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	35		33
Risk Level, Doubtful | Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases			7
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial Mortgage Loans, Nonowner-Occupied
Financing Receivable, Modifications
Total loans and leases			$ 7

[1] Excludes $126 of loans measured at fair value.

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