Summary of the Credit Risk Profile of the Bancorp's Commercial Portfolio Segment by Class (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Financing Receivable, Modifications
Total loans and leases	$ 87,142	[1]	$ 85,706	[2],[3]
Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	50,752	[4]	49,388	[5]
Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	38,253		36,038
Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Financing Receivable, Modifications
Total loans and leases	4,572		4,876
Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Financing Receivable, Modifications
Total loans and leases	3,480		4,227
Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications
Total loans and leases	875		698
Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	3,572		3,549
Pass | Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	46,239		44,340
Pass | Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	35,499		33,521
Pass | Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Financing Receivable, Modifications
Total loans and leases	3,889		3,934
Pass | Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Financing Receivable, Modifications
Total loans and leases	2,693		2,958
Pass | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications
Total loans and leases	678		444
Pass | Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	3,480		3,483
Special Mention | Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	1,470		2,007
Special Mention | Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	903		1,113
Special Mention | Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Financing Receivable, Modifications
Total loans and leases	214		338
Special Mention | Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Financing Receivable, Modifications
Total loans and leases	268		449
Special Mention | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications
Total loans and leases	35		59
Special Mention | Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	50		48
Risk Level, Substandard | Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	3,020		3,010
Risk Level, Substandard | Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	1,828		1,379
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Financing Receivable, Modifications
Total loans and leases	469		603
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Financing Receivable, Modifications
Total loans and leases	519		815
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications
Total loans and leases	162		195
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Leases
Financing Receivable, Modifications
Total loans and leases	42		18
Risk Level, Doubtful | Commercial Portfolio Segment
Financing Receivable, Modifications
Total loans and leases	23		31
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial and Industrial Loans
Financing Receivable, Modifications
Total loans and leases	23		25
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial Mortgage Loans, Owner Occupied
Financing Receivable, Modifications
Total loans and leases			1
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial Mortgage Loans, Non Owner Occupied
Financing Receivable, Modifications
Total loans and leases			$ 5

[1] Excludes $89 of loans measured at fair value.

[2] Excludes $76 of loans measured at fair value.

[3] Includes an immaterial amount of government insured commercial loans 30-89 and 90 days past due and accruing whose repayments are insured by the SBA at December 31, 2012.

[4] Excludes $89 of residential mortgage loans measured at fair value, and includes $875 of leveraged leases, net of unearned income.

[5] Excludes $76 of residential mortgage loans measured at fair value, and includes $862 of leveraged leases, net of unearned income.