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Standby and Commercial Letters of Credit, Conditional Commitments Issued to Guarantee the Performance of a Customer to a Third Party (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified

Jun. 30, 2013

Commitments

$ 4,043

Less Than One Year From The Balance Sheet Date | Commercial

Line of Credit Facility

Commitments

Less Than One Year From The Balance Sheet Date | Financial Standby Letter of Credit

Line of Credit Facility

Commitments

1,703

^[1]

More than One and within Five Years from Balance Sheet Date | Commercial

Line of Credit Facility

Commitments

More than One and within Five Years from Balance Sheet Date | Financial Standby Letter of Credit

Line of Credit Facility

Commitments

2,291

^[1]

More than five years from balance sheet date | Financial Standby Letter of Credit

Line of Credit Facility

Commitments

$ 49

[1]	Includes $65 and $3 issued on behalf of commercial customers to facilitate trade payments in U.S. dollars and foreign currencies which expire less than one year and between one and five years, respectively.

- Definition

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.

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