Summarizes the Bancorp's Recorded Investment in Impaired Loans and Related Allowance by Class (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	$ 3,565		$ 3,505
Recorded Investment	3,013	[1]	2,931	[2]
Allowance	352		438
Impaired Financing Receivables With No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	1,117		674
Recorded Investment	876		558
Impaired Financing Receivables With No Related Allowance [Member] | Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	375		194
Recorded Investment	265		153
Impaired Financing Receivables With No Related Allowance [Member] | Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	78		113
Recorded Investment	69		99
Impaired Financing Receivables With No Related Allowance [Member] | Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	191		126
Recorded Investment	157		108
Impaired Financing Receivables With No Related Allowance [Member] | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	143		24
Recorded Investment	105		8
Impaired Financing Receivables With No Related Allowance [Member] | Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	2		17
Recorded Investment	2		17
Impaired Financing Receivables With No Related Allowance [Member] | Residential Mortgage Loans
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	276		146
Recorded Investment	228		121
Impaired Financing Receivables With No Related Allowance [Member] | Consumer Portfolio Segment | Home Equity
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	48		48
Recorded Investment	46		46
Impaired Financing Receivables With No Related Allowance [Member] | Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	4		6
Recorded Investment	4		6
Impaired Financing Receivables With Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	2,448		2,831
Recorded Investment	2,137		2,373
Allowance	352		438
Impaired Financing Receivables With Related Allowance [Member] | Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	330		404
Recorded Investment	246		291
Allowance	102		128
Impaired Financing Receivables With Related Allowance [Member] | Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	66		49
Recorded Investment	52		37
Allowance	10		4
Impaired Financing Receivables With Related Allowance [Member] | Commercial Portfolio Segment | Commercial Mortgage Loans Non Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	203		386
Recorded Investment	147		202
Allowance	24		40
Impaired Financing Receivables With Related Allowance [Member] | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	213		240
Recorded Investment	120		150
Allowance	18		31
Impaired Financing Receivables With Related Allowance [Member] | Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	11		15
Recorded Investment	10		15
Allowance	2		7
Impaired Financing Receivables With Related Allowance [Member] | Residential Mortgage Loans
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	1,091		1,126
Recorded Investment	1,038		1,071
Allowance	131		121
Impaired Financing Receivables With Related Allowance [Member] | Consumer Portfolio Segment | Home Equity
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	401		400
Recorded Investment	397		397
Allowance	46		53
Impaired Financing Receivables With Related Allowance [Member] | Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	37		33
Recorded Investment	37		32
Allowance	5		5
Impaired Financing Receivables With Related Allowance [Member] | Consumer Portfolio Segment | Credit Card
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	94		100
Recorded Investment	88		100
Allowance	14		18
Impaired Financing Receivables With Related Allowance [Member] | Consumer Portfolio Segment | Consumer Other Financing Receivable
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	2		78
Recorded Investment	2		78
Allowance			$ 31

[1] Includes $390, $1,117 and $495, respectively, of commercial, residential mortgage and consumer TDRs on accrual status; $160, $141 and $79, respectively, of commercial, residential mortgage and consumer TDRs on nonaccrual status.

[2] Includes $228, $1,066 and $492, respectively, of commercial, residential mortgage and consumer TDRs on accrual status; $141, $116 and $90, respectively, of commercial, residential mortgage and consumer TDRs on nonaccrual status.