Summary of the Credit Risk Profile of the Bancorp's Commercial Portfolio Segment by Class (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Financing Receivable, Modifications [Line Items]
Total loans and leases	$ 80,953	[1]	$ 77,445	[2],[3]
Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Total loans and leases	45,472	[4]	43,462	[2]
Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	30,783		27,191
Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	5,266		5,340
Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	4,872		5,505
Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications [Line Items]
Total loans and leases	1,020		2,048
Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	3,531		3,378
Pass | Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Total loans and leases	38,197		35,104
Pass | Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	27,199		23,147
Pass | Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	3,893		4,034
Pass | Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	3,328		3,620
Pass | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications [Line Items]
Total loans and leases	343		1,034
Pass | Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	3,434		3,269
Special Mention | Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Total loans and leases	3,016		2,959
Special Mention | Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	1,641		1,406
Special Mention | Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	567		430
Special Mention | Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	521		647
Special Mention | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications [Line Items]
Total loans and leases	235		416
Special Mention | Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	52		60
Risk Level, Substandard | Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Total loans and leases	4,050		5,157
Risk Level, Substandard | Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	1,831		2,541
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	778		854
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	984		1,174
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications [Line Items]
Total loans and leases	413		540
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	44		48
Risk Level, Doubtful | Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Total loans and leases	209		242
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	112		97
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	28		22
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	39		64
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications [Line Items]
Total loans and leases	29		58
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	$ 1		$ 1

[1] Excludes $65 of loans measured at fair value.

[2] Excludes $46 of residential mortgage loans measured at fair value, and includes $1,039 of leveraged leases, net of unearned income.

[3] Excludes $46 of loans measured at fair value.

[4] Excludes $65 of residential mortgage loans measured at fair value, and includes $1,022 of leveraged leases, net of unearned income.