Summary of the Bancorp's Activities with its Principal Shareholders, Directors and Executives (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Related Party Transaction [Line Items]
Outstanding balance on loans, net of participations and undrawn commitments	$ 172	$ 74
Commitments to Extend Credit
Related Party Transaction [Line Items]
Commitments to lend, net of participations	47,719	43,677
Commitments to Extend Credit \| Due To Related Party [Member]
Related Party Transaction [Line Items]
Commitments to lend, net of participations	259	160
Commitments to Extend Credit \| Due To Related Party [Member] \| Director [Member]
Related Party Transaction [Line Items]
Commitments to lend, net of participations	254	157
Commitments to Extend Credit \| Due To Related Party [Member] \| Executive Officer [Member]
Related Party Transaction [Line Items]
Commitments to lend, net of participations	$ 5	$ 3

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents commitments outstanding as of the balance sheet date which obligate or represent potential claims against the assets of the Company relating to, for example, the extension of credit. Further, commitments generally represent off balance sheet arrangements that obligate the entity to deliver assets or services or enter into another obligation in the future.

+ References+ Details

For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.

+ References

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+ Details