Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Section B

-Paragraph 11A

-Chapter 1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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-Number 12

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

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-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

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Value of loans and leases held in the entity's portfolio transferred to loans and leases held-for-sale in noncash transactions.

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

-Paragraph 5

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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Changes in consolidations of variable interest entities related to loans

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Changes in consolidations of variable interest entities related to long-term debt

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The contract amount for a forward repurchase agreement that indexed to, and potentially settled in, the issuer's equity.

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Transfers from (to) loans to (from) mortgages held for sale.

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Transfers from loans to foreclosed assets.

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Net transfers from loans to securities available for sale.

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Transfers from mortgages held for sale to foreclosed assets.

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Transfers from mortgages held for sale to capitalized mortgage servicing rights.

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Transfers from mortgage held for sale to trading assets.

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Summary of Significant Accounting Policies (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 Private Forward Repurchase Transaction [Member]	Apr. 30, 2013 Private Forward Repurchase Transaction [Member]	Dec. 31, 2012 Private Forward Repurchase Transaction [Member]
Supplemental cash flow information - Noncash activities
Transfers from (to) loans to (from) securities available for sale	$ (108)	$ 588
Trading assets retained from securitizations of MHFS	17,940	41,362
Capitalization of MSRs from sale of MHFS	991	1,484
Transfers from MHFS to foreclosed assets	9	59
Transfers from loans to MHFS	2,475	1,355
Transfers from loans to LHFS	86	36
Transfers from loans to foreclosed assets	1,308	2,335
Changes in consolidations (deconsolidations) of variable interest entities:
Loans	(304)	(515)
Long-term debt	(342)	(515)
Summary Of Significant Accounting Policies Textuals [Abstract]
Forward Contract Indexed to Issuer's Equity, Contract Amount				$ 500	$ 200
Common stock repurchased, shares			6,000,000