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		12 Months Ended
	Mar. 31, 2014		Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due
Financing Receivable Recorded Investment 30 To 89 Days Past Due	$ 310	[1],[2]	$ 345	[1],[3]
Past Due 90 Days and Greater	579	[1],[2]	643	[1],[3]
Residential Mortgage
Financing Receivable, Recorded Investment, Past Due
Financing Receivable Recorded Investment 30 To 89 Days Past Due	71	[1],[2],[4]	73	[1],[3],[5]
Past Due 90 Days and Greater	197	[1],[2],[4]	231	[1],[3],[5]
Residential Mortgage Loans
Financing Receivable, Recorded Investment, Past Due
Portfolio loans and leases at fair value	103		92
Residential Mortgage Loans | Federal Housing Administration Loan
Financing Receivable, Recorded Investment, Past Due
Financing Receivable Recorded Investment 30 To 89 Days Past Due	75		81
Past Due 90 Days and Greater	347		378
Losses Due To Claim Denials And Curtailments	$ 5		$ 5

[1] Includes accrual and nonaccrual loans and leases.

[2] Excludes $103 of loans measured at fair value.

[3] Excludes $92 of loans measured at fair value.

[4] Information for current residential mortgage loans includes loans whose repayments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs. As of March 31, 2014, $75 of these loans were 30-89 days past due and $347 were 90 days or more past due. The Bancorp recognized $5 of losses during the three months ended March 31, 2014 due to claim denials and curtailments associated with these loans.

[5] Information for current residential mortgage loans includes loans whose repayments are insured by the Federal Housing Administration or guaranteed by the Department of Veterans Affairs. As of December 31, 2013, $81 of these loans were 30-89 days past due and $378 were 90 days or more past due. The Bancorp recognized $5 of losses for the year ended December 31, 2013 due to claim denials and curtailments associated with these loans.