Summarizes the Bancorp's Recorded Investment in Portfolio Loans and Leases by Age and Class (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2015		Sep. 30, 2014	Sep. 30, 2015		Sep. 30, 2014	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 571	[1]		$ 571	[1]		$ 704	[2]
30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	258	[1],[3]		258	[1],[3]		297	[2],[4]
90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	313	[1],[3]		313	[1],[3]		407	[2],[4]
Residential Mortgage Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Portfolio loans and leases at fair value	173			173			108
Residential Mortgage Loans | Federal Housing Administration Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Losses Due To Claim Denials And Curtailments	2		$ 2	6		$ 9
Residential Mortgage Loans | Federal Housing Administration Loan | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	99			99			99
Residential Mortgage Loans | Federal Housing Administration Loan | 90 Days and Greater Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 337			$ 337			$ 373

[1] Excludes $173 of residential mortgage loans measured at fair value.

[2] Excludes $108 of residential mortgage loans measured at fair value.

[3] Includes accrual and nonaccrual loans and leases.

[4] Includes accrual and nonaccrual loans and leases.