Summarizes the Bancorp's Recorded Investment in Portfolio Loans and Leases by Age and Class (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Recorded Investment 30 To 89 Days Past Due	$ 413	[1],[2],[3]	$ 519	[1],[4],[5]
Past Due 90 Days and Greater	912	[1],[2],[3]	1,227	[1],[4],[5]
Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Recorded Investment 30 To 89 Days Past Due	87	[1],[2],[6]	110	[1],[4],[7]
Past Due 90 Days and Greater	307	[1],[2],[6]	348	[1],[4],[7]
Residential Mortgage Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Portfolio loans and leases at fair value	76		65
Residential Mortgage Loans | Federal Housing Administration Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Recorded Investment 30 To 89 Days Past Due	80		45
Past Due 90 Days and Greater	414		309
Losses Due To Claim Denials And Curtailments	$ 2

[1] Includes accrual and nonaccrual loans and leases.

[2] Excludes $76 of loans measured at fair value.

[3] Includes an immaterial amount of government insured commercial loans 30-89 days and 90 days past due and accruing whose repayments are insured by the Small Business Administration at December 31, 2012.

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

[5] Includes an immaterial amount of government insured commercial loans 30-89 and 90 days past due and accruing whose repayments are insured by the Small Business Administration at December 31, 2011.

[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 December 31, 2012, $80 of these loans were 30-89 days past due and $414 were 90 days or more past due. The Bancorp recognized $2 million of losses for the year ended December 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.