Summarizes the Bancorp's Recorded Investment in Portfolio Loans and Leases by Age and Class (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Dec. 31, 2011		Mar. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Recorded Investment 30 To 89 Days Past Due	$ 458	[1]	$ 519	[2]	$ 707	[3]
Past Due 90 Days and Greater	1,172	[1],[4]	1,227	[2],[4]	1,432	[3],[5]
Losses Due To Claim Denials Curtailments	1
Residential Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Recorded Investment 30 To 89 Days Past Due	97	[1],[6]	110	[2],[7]	119	[3],[8]
Past Due 90 Days and Greater	336	[1],[4],[6]	348	[2],[4],[7]	356	[3],[5],[8]
Federal Housing Administration Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Recorded Investment 30 To 89 Days Past Due	49		45		50
Past Due 90 Days and Greater	320		309		298
Residential Mortgage Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Portfolio loans and leases at fair value	$ 67		$ 65		$ 54

[1] Excludes $67 of loans measured at fair value.

[2] Excludes $65 of loans measured at fair value.

[3] Excludes $54 of loans measured at fair value.

[4] Includes accrual and nonaccrual loans and leases.

[5] Includes accrual and nonaccrual loans and leases

[6] Information for current residential mortgage loans includes advances made pursuant to servicing agreements for GNMA mortgage pools whose repayments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs. As of March 31, 2012, $49 of these loans were 30-89 days past due and $320 were 90 days or more past due. The Bancorp recognized $1 of losses for the three months ended March 31, 2012 due to claim denials and curtailments associated with these advances.

[7] Information for current residential mortgage loans includes advances made pursuant to servicing agreements for GNMA mortgage pools whose repayments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs. As of December 31, 2011, $45 of these loans were 30-89 days past due and $309 were 90 days or more past due. The Bancorp recognized an immaterial amount of losses for the year ended December 31, 2011 due to claim denials and curtailments associated with these advances.

[8] Information for current residential mortgage loans includes advances made pursuant to servicing agreements for GNMA mortgage pools whose repayments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs. As of March 31, 2011 $50 of these loans were 30-89 days past due and $298 were 90 days or more past due. The Bancorp recognized an immaterial amount of losses for the three months ended March 31, 2011 due to claim denials and curtailments associated with these advances.