Summarizes the Bancorp's Recorded Investment in Impaired Loans and Related Allowance by Class (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011		Jun. 30, 2011
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	$ 3,543		$ 3,565		$ 3,308
Recorded Investment	3,027	[1]	3,013	[2]	3,004	[3]
Allowance	309		352		447
Impaired Financing Receivables With No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	1,216		1,117		779
Recorded Investment	971	[1]	876	[2]	656	[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	334		375		210
Recorded Investment	260	[1]	265	[2]	155	[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	130		78		60
Recorded Investment	117	[1]	69	[2]	83	[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	264		191		148
Recorded Investment	209	[1]	157	[2]	139	[3]
Impaired Financing Receivables With No Related Allowance [Member] | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	115		143		70
Recorded Investment	68	[1]	105	[2]	34	[3]
Impaired Financing Receivables With No Related Allowance [Member] | Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	7		2		4
Recorded Investment	7	[1]	2	[2]	4	[3]
Impaired Financing Receivables With No Related Allowance [Member] | Residential Mortgage Loans
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	323		276		221
Recorded Investment	269	[1]	228	[2]	178	[3]
Impaired Financing Receivables With No Related Allowance [Member] | Consumer Portfolio Segment | Home Equity
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	40		48		62
Recorded Investment	38	[1]	46	[2]	59	[3]
Impaired Financing Receivables With No Related Allowance [Member] | Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	3		4		4
Recorded Investment	3	[1]	4	[2]	4	[3]
Impaired Financing Receivables With Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	2,327		2,448		2,529
Recorded Investment	2,056	[1]	2,137	[2]	2,348	[3]
Allowance	309		352		447
Impaired Financing Receivables With Related Allowance [Member] | Commercial Portfolio Segment | Commercial And Industrial Loans [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	284		330		414
Recorded Investment	198	[1]	246	[2]	394	[3]
Allowance	80		102		184
Impaired Financing Receivables With Related Allowance [Member] | Commercial Portfolio Segment | Commercial Mortgage Loans Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	68		66		49
Recorded Investment	55	[1]	52	[2]	38	[3]
Allowance	8		10		5
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	229		203		208
Recorded Investment	174	[1]	147	[2]	162	[3]
Allowance	19		24		30
Impaired Financing Receivables With Related Allowance [Member] | Commercial Portfolio Segment | Commercial Construction
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	152		213		207
Recorded Investment	108	[1]	120	[2]	156	[3]
Allowance	9		18		19
Impaired Financing Receivables With Related Allowance [Member] | Commercial Portfolio Segment | Commercial Leases [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	12		11		12
Recorded Investment	4	[1]	10	[2]	19	[3]
Allowance	1		2		8
Impaired Financing Receivables With Related Allowance [Member] | Residential Mortgage Loans
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	1,045		1,091		1,101
Recorded Investment	996	[1]	1,038	[2]	1,053	[3]
Allowance	129		131		127
Impaired Financing Receivables With Related Allowance [Member] | Consumer Portfolio Segment | Home Equity
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	404		401		392
Recorded Investment	401	[1]	397	[2]	389	[3]
Allowance	45		46		50
Impaired Financing Receivables With Related Allowance [Member] | Consumer Portfolio Segment | Automobile Loans
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	36		37		36
Recorded Investment	36	[1]	37	[2]	36	[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	97		94		105
Recorded Investment	84	[1]	88	[2]	96	[3]
Allowance	13		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		5
Recorded Investment			2	[2]	5	[3]
Allowance					$ 1

[1] Includes $455, $1,140 and $494, respectively, of commercial, residential mortgage and consumer TDRs on accrual status; $147, $125 and $68, 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] (a) Includes $266, $1,088, and $505, respectively, of commercial, residential mortgage and consumer TDRs on accrual status; $188, $127 and $84, respectively, of commercial, residential mortgage and consumer TDRs on nonaccrual status.