Summarizes the Bancorp's Recorded Investment in Impaired Loans and Related Allowance by Class (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	$ 3,168		$ 3,565
Recorded Investment	2,823	[1]	3,013	[2]
Allowance	295		352
Impaired Financing Receivables With No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	1,006		1,117
Recorded Investment	856		876
Impaired Financing Receivables With Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	2,162		2,448
Recorded Investment	1,967		2,137
Allowance	295		352
Residential Mortgage Loans | Impaired Financing Receivables With No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	326		276
Recorded Investment	275		228
Residential Mortgage Loans | Impaired Financing Receivables With Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	1,067		1,091
Recorded Investment	1,023		1,038
Allowance	137		131
Commercial And Industrial Loans [Member] | Commercial Portfolio Segment | Impaired Financing Receivables With No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	207		375
Recorded Investment	169		265
Commercial And Industrial Loans [Member] | Commercial Portfolio Segment | Impaired Financing Receivables With Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	263		330
Recorded Investment	194		246
Allowance	65		102
Commercial Mortgage Loans Owner Occupied [Member] | Commercial Portfolio Segment | Impaired Financing Receivables With No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	107		78
Recorded Investment	99		69
Commercial Mortgage Loans Owner Occupied [Member] | Commercial Portfolio Segment | Impaired Financing Receivables With Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	54		66
Recorded Investment	43		52
Allowance	5		10
Commercial Mortgage Loans Non Owner Occupied [Member] | Commercial Portfolio Segment | Impaired Financing Receivables With No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	209		191
Recorded Investment	199		157
Commercial Mortgage Loans Non Owner Occupied [Member] | Commercial Portfolio Segment | Impaired Financing Receivables With Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	215		203
Recorded Investment	160		147
Allowance	16		24
Commercial Construction | Commercial Portfolio Segment | Impaired Financing Receivables With No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	109		143
Recorded Investment	67		105
Commercial Construction | Commercial Portfolio Segment | Impaired Financing Receivables With Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	48		213
Recorded Investment	37		120
Allowance	5		18
Commercial Leases [Member] | Commercial Portfolio Segment | Impaired Financing Receivables With No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	5		2
Recorded Investment	5		2
Commercial Leases [Member] | Commercial Portfolio Segment | Impaired Financing Receivables With Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	8		11
Recorded Investment	8		10
Allowance	5		2
Home Equity | Consumer Portfolio Segment | Impaired Financing Receivables With No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	40		48
Recorded Investment	39		46
Home Equity | Consumer Portfolio Segment | Impaired Financing Receivables With Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	400		401
Recorded Investment	396		397
Allowance	46		46
Automobile Loans | Consumer Portfolio Segment | Impaired Financing Receivables With No Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	3		4
Recorded Investment	3		4
Automobile Loans | Consumer Portfolio Segment | Impaired Financing Receivables With Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	31		37
Recorded Investment	30		37
Allowance	4		5
Credit Card | Consumer Portfolio Segment | Impaired Financing Receivables With Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	74		94
Recorded Investment	74		88
Allowance	12		14
Consumer Other Financing Receivable | Consumer Portfolio Segment | Impaired Financing Receivables With Related Allowance [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	2		2
Recorded Investment	$ 2		$ 2

[1] Includes $431, $1,175 and $480, respectively, of commercial, residential mortgage and consumer TDRs on accrual status; $177, $123 and $64, 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.