Summary of the Bancorp's Long-Term Borrowings (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Debt Instrument [Line Items]
Long-term debt	$ 9,633	[1]	$ 7,085	[1]
Parent company
Debt Instrument [Line Items]
Long-term debt	4,757		5,751
Parent company | Senior Debt Obligations | Fixed Rate 6.25 Percent Notes Due 2013
Debt Instrument [Line Items]
Long-term debt			758
Parent company | Senior Debt Obligations | Fixed Rate 3.625 Percent Notes Due 2016
Debt Instrument [Line Items]
Debt Instrument Maturity Date Range Start	Jan. 25, 2011
Debt Instrument Maturity Date Range End	Jan. 25, 2016
Interest rate	3.625%
Long-term debt	999		999
Parent company | Senior Debt Obligations | Fixed Rate 3.50 Percent Due 2022
Debt Instrument [Line Items]
Debt Instrument Maturity Date Range Start	Mar. 07, 2012
Debt Instrument Maturity Date Range End	Mar. 15, 2022
Interest rate	3.50%
Long-term debt	497		497
Parent company | Subordinated debt | Floating Rate 0.67 Percent Notes Due 2016
Debt Instrument [Line Items]
Debt Instrument Maturity Date Range Start	Dec. 13, 2006	[2]
Debt Instrument Maturity Date Range End	Dec. 20, 2016	[2]
Variable interest rate	0.67%	[2]
Long-term debt	250	[2]	250	[2]
Parent company | Subordinated debt | Fixed Rate 5.45 Percent Notes Due 2017
Debt Instrument [Line Items]
Debt Instrument Maturity Date Range Start	Dec. 20, 2006	[2]
Debt Instrument Maturity Date Range End	Jan. 15, 2017	[2]
Interest rate	5.45%	[2]
Long-term debt	558	[2]	583	[2]
Parent company | Subordinated debt | Fixed Rate 4.50 Percent Notes Due 2018
Debt Instrument [Line Items]
Debt Instrument Maturity Date Range Start	May 23, 2003	[2]
Debt Instrument Maturity Date Range End	Jun. 01, 2018	[2]
Interest rate	4.50%	[2]
Long-term debt	555	[2]	584	[2]
Parent company | Subordinated debt | Fixed Rate 4.30 Notes Due 2024
Debt Instrument [Line Items]
Debt Instrument Maturity Date Range Start	Nov. 20, 2013	[2]
Debt Instrument Maturity Date Range End	Jan. 16, 2024	[2]
Interest rate	4.30%	[2]
Long-term debt	748	[2]
Parent company | Subordinated debt | Fixed Rate 8.25 Percent Notes Due 2038
Debt Instrument [Line Items]
Debt Instrument Maturity Date Range Start	Mar. 04, 2008	[2]
Debt Instrument Maturity Date Range End	Mar. 01, 2038	[2]
Interest rate	8.25%	[2]
Long-term debt	1,150	[2]	1,330	[2]
Parent company | Junior subordinated debt | Fixed Rate 6.50 Percent Notes Due 2067
Debt Instrument [Line Items]
Long-term debt			750	[3]
Subsidiaries [Member] | Senior Debt Obligations | Floating Rate 0.67 Percent Notes Due 2016
Debt Instrument [Line Items]
Debt Instrument Maturity Date Range Start	Feb. 28, 2013
Debt Instrument Maturity Date Range End	Feb. 26, 2016
Variable interest rate	0.67%
Subsidiaries [Member] | Senior Debt Obligations | Floating Rate Bank Notes Due 2013
Debt Instrument [Line Items]
Long-term debt			500
Subsidiaries [Member] | Senior Debt Obligations | Fixed Rate 1.15 Percent Notes Due 2016
Debt Instrument [Line Items]
Debt Instrument Maturity Date Range Start	Nov. 20, 2013
Debt Instrument Maturity Date Range End	Nov. 18, 2016
Interest rate	1.15%
Long-term debt	1,000
Subsidiaries [Member] | Senior Debt Obligations | Fixed Rate 0.90 Percent Notes Due 2016
Debt Instrument [Line Items]
Debt Instrument Maturity Date Range Start	Feb. 28, 2013
Debt Instrument Maturity Date Range End	Feb. 26, 2016
Interest rate	0.90%
Subsidiaries [Member] | Senior Debt Obligations | Floating Rate 0.75 Percent Notes Due 2016
Debt Instrument [Line Items]
Debt Instrument Maturity Date Range Start	Nov. 20, 2013
Debt Instrument Maturity Date Range End	Nov. 18, 2016
Variable interest rate	0.75%
Subsidiaries [Member] | Senior Debt Obligations | Fixed Rate 1.45 Percent Notes Due 2018
Debt Instrument [Line Items]
Debt Instrument Maturity Date Range Start	Feb. 28, 2013
Debt Instrument Maturity Date Range End	Feb. 28, 2018
Interest rate	1.45%
Subsidiaries [Member] | Subordinated debt | Floating Rate 0.67 Percent Notes Due 2016
Debt Instrument [Line Items]
Long-term debt	300
Subsidiaries [Member] | Subordinated debt | Fixed Rate 0.90 Percent Notes Due 2016
Debt Instrument [Line Items]
Long-term debt	400
Subsidiaries [Member] | Subordinated debt | Floating Rate 0.75 Percent Notes Due 2016
Debt Instrument [Line Items]
Long-term debt	750
Subsidiaries [Member] | Subordinated debt | Fixed Rate 1.45 Percent Notes Due 2018
Debt Instrument [Line Items]
Long-term debt	587
Subsidiaries [Member] | Subordinated debt | Fixed Rate 4.75 Percent Bank Notes Due 2015
Debt Instrument [Line Items]
Debt Instrument Maturity Date Range Start	Jan. 31, 2005
Debt Instrument Maturity Date Range End	Feb. 01, 2015
Interest rate	4.75%
Long-term debt	524	[2]	546	[2]
Subsidiaries [Member] | Junior subordinated debt | Floating Rate 1.67% - 1.94% Debentures Due 2035
Debt Instrument [Line Items]
Debt Instrument Maturity Date Range Start	Jun. 28, 2005	[3]
Debt Instrument Maturity Date Range End	Dec. 15, 2035	[3]
Long-term debt	51	[3]	50	[3]
Subsidiaries [Member] | Junior subordinated debt | Floating Rate 1.67% - 1.94% Debentures Due 2035 | Lower Limit
Debt Instrument [Line Items]
Variable interest rate	1.67%	[3]
Subsidiaries [Member] | Junior subordinated debt | Floating Rate 1.67% - 1.94% Debentures Due 2035 | Upper Limit
Debt Instrument [Line Items]
Variable interest rate	1.94%	[3]
Subsidiaries [Member] | Federal Home Loan Bank Advances 0.05 To 6.87 Percent Due 2014 Through 2037 | FHLB Rate 0.05 To 6.87 Percent Debentures Due 2014 And 2041
Debt Instrument [Line Items]
Debt Instrument Maturity Date Range Start	Jan. 01, 2014
Debt Instrument Maturity Date Range End	Dec. 31, 2041
Long-term debt	44		53
Subsidiaries [Member] | Federal Home Loan Bank Advances 0.05 To 6.87 Percent Due 2014 Through 2037 | FHLB Rate 0.05 To 6.87 Percent Debentures Due 2014 And 2041 | Lower Limit
Debt Instrument [Line Items]
Variable interest rate	0.05%
Subsidiaries [Member] | Federal Home Loan Bank Advances 0.05 To 6.87 Percent Due 2014 Through 2037 | FHLB Rate 0.05 To 6.87 Percent Debentures Due 2014 And 2041 | Upper Limit
Debt Instrument [Line Items]
Variable interest rate	6.87%
Subsidiaries [Member] | Variable Interest Entity, Primary Beneficiary | Automobile Securitization Notes Due 2014-2020
Debt Instrument [Line Items]
Debt Instrument Maturity Date Range Start	Jan. 01, 2014
Debt Instrument Maturity Date Range End	Feb. 18, 2020
Long-term debt	1,048
Subsidiaries [Member] | Variable Interest Entity, Primary Beneficiary | Automobile Securitization Notes Due 2014-2020 | Lower Limit
Debt Instrument [Line Items]
Interest rate	0.25%
Subsidiaries [Member] | Variable Interest Entity, Primary Beneficiary | Automobile Securitization Notes Due 2014-2020 | Upper Limit
Debt Instrument [Line Items]
Variable interest rate	1.30%
Subsidiaries [Member] | Variable Interest Entity, Primary Beneficiary | Debt Other Variable Percent Due 2014 Through 2039
Debt Instrument [Line Items]
Debt Instrument Maturity Date Range Start	Jan. 01, 2014
Debt Instrument Maturity Date Range End	Dec. 31, 2039
Long-term debt	$ 172		$ 185

[1] At December 31, 2013 and 2012, includes $49 and $0 of cash and due from banks, $48 and $50 of commercial mortgage loans, $ 1,010 and $0 of automobile loans, $(15) and $(5) of ALLL, $13 and $3 of other assets, $1 and $0 of other liabilities, $ 1,048 and $0 of long-term debt from consolidated VIEs that are included in their respective captions. See Note 10.

[2] Qualify as Tier II capital for regulatory capital purposes.

[3] Qualify as Tier I capital for regulatory capital purposes. See Note 28 for further information.