Summarizes the Bancorp's Recorded Investment in Impaired Loans and Related Allowance by Class (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012		Dec. 31, 2011		Mar. 31, 2011
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	$ 3,483		$ 3,565		$ 3,486
Recorded Investment	2,985	[1]	3,013	[2]	2,957	[3]
Allowance	329		352		519
Impaired Financing Receivables With No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	1,074		1,117		746
Recorded Investment	897	[1]	876	[2]	600	[3]
Impaired Financing Receivables With No Related Allowance [Member] | Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	275		375		178
Recorded Investment	228	[1]	265	[2]	142	[3]
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	99		78		64
Recorded Investment	88	[1]	69	[2]	54	[3]
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	205		191		171
Recorded Investment	179	[1]	157	[2]	144	[3]
Impaired Financing Receivables With No Related Allowance [Member] | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	130		143		73
Recorded Investment	94	[1]	105	[2]	43	[3]
Impaired Financing Receivables With No Related Allowance [Member] | Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	6		2		4
Recorded Investment	6	[1]	2	[2]	4	[3]
Impaired Financing Receivables With No Related Allowance [Member] | Residential Mortgage Loans
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	312		276		201
Recorded Investment	258	[1]	228	[2]	160	[3]
Impaired Financing Receivables With No Related Allowance [Member] | Consumer Portfolio Segment | Home Equity
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	44		48		50
Recorded Investment	41	[1]	46	[2]	48	[3]
Impaired Financing Receivables With No Related Allowance [Member] | Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	3		4		5
Recorded Investment	3	[1]	4	[2]	5	[3]
Impaired Financing Receivables With Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	2,409		2,448		2,740
Recorded Investment	2,088	[1]	2,137	[2]	2,357	[3]
Allowance	329		352		519
Impaired Financing Receivables With Related Allowance [Member] | Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	367		330		479
Recorded Investment	248	[1]	246	[2]	351	[3]
Allowance	92		102		162
Impaired Financing Receivables With Related Allowance [Member] | Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	88		66		107
Recorded Investment	69	[1]	52	[2]	66	[3]
Allowance	9		10		17
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	227		203		169
Recorded Investment	159	[1]	147	[2]	117	[3]
Allowance	19		24		21
Impaired Financing Receivables With Related Allowance [Member] | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	142		213		252
Recorded Investment	85	[1]	120	[2]	159	[3]
Allowance	12		18		39
Impaired Financing Receivables With Related Allowance [Member] | Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	4		11		10
Recorded Investment	4	[1]	10	[2]	10	[3]
Allowance	1		2		48
Impaired Financing Receivables With Related Allowance [Member] | Residential Mortgage Loans
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	1,044		1,091		1,094
Recorded Investment	997	[1]	1,038	[2]	1,044	[3]
Allowance	131		131		125
Impaired Financing Receivables With Related Allowance [Member] | Consumer Portfolio Segment | Home Equity
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	401		401		395
Recorded Investment	398	[1]	397	[2]	393	[3]
Allowance	47		46		52
Impaired Financing Receivables With Related Allowance [Member] | Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	39		37		35
Recorded Investment	39	[1]	37	[2]	34	[3]
Allowance	5		5		5
Impaired Financing Receivables With Related Allowance [Member] | Consumer Portfolio Segment | Credit Card
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	95		94		112
Recorded Investment	87	[1]	88	[2]	99	[3]
Allowance	13		14		19
Impaired Financing Receivables With Related Allowance [Member] | Consumer Portfolio Segment | Consumer Other Financing Receivable
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance			2		87
Recorded Investment			2	[2]	84	[3]
Allowance					$ 31

[1] Includes $481, $1,125 and $499, respectively, of commercial, residential mortgage and consumer TDRs on accrual status; $157, $130 and $71, respectively, of commercial, residential mortgage and consumer TDRs on nonaccrual status.

[2] 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.

[3] Includes $243, $1,083, and $515, respectively, of commercial, residential mortgage and consumer TDRs on accrual status; $149, $121 and $148, respectively, of commercial, residential mortgage and consumer TDRs on nonaccrual status.