Fair Value Inputs Credit Valuation Adjustment As A Percentage Of Derivative Contract

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- Definition

Fair value measurement transfers from one level to another.

+ References

No definition available.

+ Details

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- Details

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- Definition

For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 30

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

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- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

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Fair Values of Assets and Liabilities - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended						6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Standby Letters of Credit and Unfunded Commitments [Member]	Dec. 31, 2012 Standby Letters of Credit and Unfunded Commitments [Member]	Jun. 30, 2013 Other Guarantees [Member]	Dec. 31, 2012 Other Guarantees [Member]	Jun. 30, 2013 Minimum [Member]	Jun. 30, 2013 Maximum [Member]	Jun. 30, 2013 Average [Member]
Fair Value Disclosures [Abstract]
Fair value measurement transfers from one level to another			$ 0	$ 0
Mortgage loans held for sale measured at fair value gain (loss)	(146)	241	(321)	260
Assumed credit valuation adjustment as percentage of underlying fair value of underlying derivative contracts									0.00%	100.00%	6.00%
Carrying value of guarantee obligations					$ 397	$ 415	$ 393	$ 452