The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 45

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=51824106&loc=d3e2611-110228

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-Name Accounting Standards Codification

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- Definition

The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

-Paragraph 2

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Results of Operations and Average Assets by Segment (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Other Asset Impairment Charges		$ 36
Branch Banking
Segment Reporting Information [Line Items]
Impairment of Branches and Land	$ 2	104	$ 18
Commercial Banking \| Operating lease equipment
Segment Reporting Information [Line Items]
Other Asset Impairment Charges	$ 2	$ 36