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		9 Months Ended		12 Months Ended
	Sep. 30, 2013		Sep. 30, 2013		Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due
Financing Receivable Recorded Investment 30 To 89 Days Past Due	$ 304	[1],[2]	$ 304	[1],[2]	$ 413	[1],[3],[4]
Past Due 90 Days and Greater	651	[1],[2]	651	[1],[2]	912	[1],[3],[4]
Residential Mortgage
Financing Receivable, Recorded Investment, Past Due
Financing Receivable Recorded Investment 30 To 89 Days Past Due	69	[1],[2],[5]	69	[1],[2],[5]	87	[1],[3],[6]
Past Due 90 Days and Greater	234	[1],[2],[5]	234	[1],[2],[5]	307	[1],[3],[6]
Residential Mortgage Loans
Financing Receivable, Recorded Investment, Past Due
Portfolio loans and leases at fair value	89		89		76
Residential Mortgage Loans | Federal Housing Administration Loan
Financing Receivable, Recorded Investment, Past Due
Financing Receivable Recorded Investment 30 To 89 Days Past Due	83		83		80
Past Due 90 Days and Greater	379		379		414
Losses Due To Claim Denials And Curtailments	$ 1		$ 2		$ 2

[1] Includes accrual and nonaccrual loans and leases.

[2] Excludes $89 of loans measured at fair value.

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

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

[5] 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 September 30, 2013, $83 of these loans were 30-89 days past due and $379 were 90 days or more past due. The Bancorp recognized $1 and $2 of losses during the three and nine months ended September 30, 2013, respectively, due to claim denials and curtailments associated with these advances.

[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 of losses for the year ended December 31, 2012 due to claim denials and curtailments associated with these advances.