Summarizes the Bancorp's Recorded Investment in Impaired Loans and Related Allowance by Class (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011		Jun. 30, 2011
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 3,027	[1]	$ 3,013	[2]	$ 3,004	[3]
Commercial Portfolio Segment | Troubled Debt Restructuring On Accrual Status [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	455		390		266
Commercial Portfolio Segment | Troubled Debt Restructuring On Nonaccrual Status [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	147		160		188
Residential Mortgage Loans | Troubled Debt Restructuring On Accrual Status [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,140		1,117		1,088
Residential Mortgage Loans | Troubled Debt Restructuring On Nonaccrual Status [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	125		141		127
Consumer Portfolio Segment | Troubled Debt Restructuring On Accrual Status [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	494		495		505
Consumer Portfolio Segment | Troubled Debt Restructuring On Nonaccrual Status [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 68		$ 79		$ 84

[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.