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		6 Months Ended
	Jun. 30, 2012		Jun. 30, 2012		Jun. 30, 2011		Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Recorded Investment 30 To 89 Days Past Due	$ 422	[1],[2]	$ 422	[1],[2]	$ 520	[3],[4]	$ 519	[5],[6]
Past Due 90 Days and Greater	1,138	[1],[2],[7]	1,138	[1],[2],[7]	1,414	[3],[4],[8]	1,227	[5],[6],[9]
Losses Due To Claim Denials And Curtailments	2		2		1
Residential Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Recorded Investment 30 To 89 Days Past Due	99	[1],[10]	99	[1],[10]	102	[11],[3]	110	[12],[5]
Past Due 90 Days and Greater	337	[1],[10],[7]	337	[1],[10],[7]	354	[11],[3],[8]	348	[12],[5],[9]
Federal Housing Administration Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Recorded Investment 30 To 89 Days Past Due	50		50		28		45
Past Due 90 Days and Greater	359		359		271		309
Residential Mortgage Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Portfolio loans and leases at fair value	76		76		59		65
Small Business Administration Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Recorded Investment 30 To 89 Days Past Due	$ 1		$ 1		$ 1

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

[2] Includes $1 of government insured commercial loans 30-89 days past due and accruing whose repayments are insured by the Small Business Administration at June 30, 2012 and an immaterial amount of government insured commercial loans 90 days past due and still accruing

[3] Excludes $59 of loans measured at fair value.

[4] Includes $1 of government insured loans 30-89 days past due and accruing of government insured commercial loans whose repayments are insured by the Small Business Administration at June 30, 2011 and an immaterial amount of government insured commercial loans 90 days past due and still accruing.

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

[6] 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.

[7] Includes accrual and nonaccrual loans and leases. Includes $1 of government insured commercial loans 30-89 days past due and accruing whose repayments are insured by the Small Business Administration at June 30, 2012 and an immaterial amount of government insured commercial loans 90 days past due and still accruing.

[8] Includes accrual and nonaccrual loans and leases. (d) Includes $1 of government insured loans 30-89 days past due and accruing of government insured commercial loans whose repayments are insured by the Small Business Administration at June 30, 2011 and an immaterial amount of government insured commercial loans 90 days past due and still accruing.

[9] Includes accrual and nonaccrual loans and leases.

[10] 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 June 30, 2012, $50 of these loans were 30-89 days past due and $359 were 90 days or more past due. The Bancorp recognized $2 of losses for the three and six months ended June 30, 2012 due to claim denials and curtailments associated with these advances.

[11] 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 June 30, 2011, $28 of these loans were 30-89 days past due and $271 were 90 days or more past due. The Bancorp recognized an immaterial amount of losses for the three months ended June 30, 2011 and $1 million for the six months ended June 30, 2011 due to claim denials and curtailments associated with these advances.

[12] 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.