Summary of the Credit Risk Profile of the Bancorp's Commercial Portfolio Segment by Class (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011		Jun. 30, 2011
Financing Receivable, Modifications [Line Items]
Total loans and leases	$ 82,283	[1],[2],[3]	$ 80,953	[4],[5],[6]	$ 77,908	[7],[8],[9]
Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Total loans and leases	46,563	[1]	45,472	[4]	43,436	[7]
Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	32,612		30,783		28,099
Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	5,152		5,266		5,229
Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	4,510		4,872		5,004
Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications [Line Items]
Total loans and leases	822		1,020		1,778
Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	3,467		3,531		3,326
Pass | Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Total loans and leases	40,048		38,197		35,638
Pass | Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	29,379		27,199		24,268
Pass | Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	3,902		3,893		3,995
Pass | Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	3,015		3,328		3,195
Pass | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications [Line Items]
Total loans and leases	364		343		948
Pass | Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	3,388		3,434		3,232
Special Mention | Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Total loans and leases	2,851		3,016		3,019
Special Mention | Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	1,575		1,641		1,594
Special Mention | Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	491		567		430
Special Mention | Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	559		521		640
Special Mention | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications [Line Items]
Total loans and leases	170		235		303
Special Mention | Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	56		52		52
Risk Level, Substandard | Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Total loans and leases	3,608		4,050		4,503
Risk Level, Substandard | Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	1,626		1,831		2,077
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	752		778		779
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	922		984		1,134
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications [Line Items]
Total loans and leases	285		413		473
Risk Level, Substandard | Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	23		44		40
Risk Level, Doubtful | Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Total loans and leases	56		209		276
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	32		112		160
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	7		28		25
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases	14		39		35
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Modifications [Line Items]
Total loans and leases	3		29		54
Risk Level, Doubtful | Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Modifications [Line Items]
Total loans and leases			$ 1		$ 2

[1] Excludes $76 of residential mortgage loans measured at fair value, and includes $967 of leveraged leases, net of unearned income.

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

[3] Includes $1 of government insured commercial loans 30-89 days past due and accruing whose repayments are insured by the Small Business Administration at June 30, 2012 and an immaterial amount of government insured commercial loans 90 days past due and still accruing

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

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

[6] Includes an immaterial amount of government insured commercial loans 30-89 and 90 days past due and accruing whose repayments are insured by the Small Business Administration at December 31, 2011.

[7] Excludes $59 of residential mortgage loans measured at fair value, includes $1,015 of leveraged leases, net of unearned income.

[8] Excludes $59 of loans measured at fair value.

[9] Includes $1 of government insured loans 30-89 days past due and accruing of government insured commercial loans whose repayments are insured by the Small Business Administration at June 30, 2011 and an immaterial amount of government insured commercial loans 90 days past due and still accruing.