This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

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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 Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

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Derivative instrument obligations meeting the definition of a liability which the Company is a party to as of the balance sheet date.

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Fair value as of the balance sheet date of an asset representing net future revenues from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

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Fair Values of Assets and Liabilities (Details 2) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010
Assets, Fair Value Disclosure
Mortgage servicing rights	$ 1,594	$ 1,737	$ 1,519	$ 1,989	$ 2,073	$ 1,837
Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	39,313		51,937
Mortgage loans held for sale	8,223		6,925
Mortgage servicing rights	1,594		1,519
Derivative assets	1,620		1,619
Other assets	717		613
Total	51,467		62,613
Liabilities, Fair Value Disclosure
Derivative liabilities	1,512		665
Other liabilities	611		613
Total	2,123		1,278
Fair Value, Measurements, Recurring [Member] \| U.S. Treasury and agencies [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	800		1,057
Fair Value, Measurements, Recurring [Member] \| Obligations of state and political subdivisions [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	6,510		6,539
Fair Value, Measurements, Recurring [Member] \| Obligations of foreign governments [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	6		6
Fair Value, Measurements, Recurring [Member] \| Corporate Debt Securities [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	831		827
Fair Value, Measurements, Recurring [Member] \| Perpetual preferred securities [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	331		318
Fair Value, Measurements, Recurring [Member] \| Other Investments [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	238		202
Fair Value, Measurements, Recurring [Member] \| Residential [Member] \| Agency [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	28,079		40,314
Fair Value, Measurements, Recurring [Member] \| Residential [Member] \| Residential Non-agency Prime [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	713		803
Fair Value, Measurements, Recurring [Member] \| Residential [Member] \| Residential Non-agency Non-Prime [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	796		802
Fair Value, Measurements, Recurring [Member] \| Commercial [Member] \| Commercial Mortgage-backed Agency Securities [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	132		140
Fair Value, Measurements, Recurring [Member] \| Commercial [Member] \| Commercial Mortgage-backed Non-Agency Securities [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	37		42
Fair Value, Measurements, Recurring [Member] \| Asset backed Securities [Member] \| Collateralized Loan Obligations [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	144		206
Fair Value, Measurements, Recurring [Member] \| Asset backed Securities [Member] \| Other [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	696		681
Level 1 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	743		755
Other assets	129		146
Total	872		901
Liabilities, Fair Value Disclosure
Other liabilities	69		75
Total	69		75
Level 1 [Member] \| Fair Value, Measurements, Recurring [Member] \| U.S. Treasury and agencies [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	516		562
Level 1 [Member] \| Fair Value, Measurements, Recurring [Member] \| Other Investments [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	227		193
Level 2 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	36,801		49,289
Mortgage loans held for sale	8,223		6,925
Derivative assets	537		632
Other assets	588		467
Total	46,149		57,313
Liabilities, Fair Value Disclosure
Derivative liabilities	2,343		2,501
Other liabilities	542		538
Total	2,885		3,039
Level 2 [Member] \| Fair Value, Measurements, Recurring [Member] \| U.S. Treasury and agencies [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	284		495
Level 2 [Member] \| Fair Value, Measurements, Recurring [Member] \| Collateralized Loan Obligations [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	42
Level 2 [Member] \| Fair Value, Measurements, Recurring [Member] \| Obligations of state and political subdivisions [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	6,510		6,539
Level 2 [Member] \| Fair Value, Measurements, Recurring [Member] \| Obligations of foreign governments [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	6		6
Level 2 [Member] \| Fair Value, Measurements, Recurring [Member] \| Corporate Debt Securities [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	822		818
Level 2 [Member] \| Fair Value, Measurements, Recurring [Member] \| Perpetual preferred securities [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	331		318
Level 2 [Member] \| Fair Value, Measurements, Recurring [Member] \| Other Investments [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	11		9
Level 2 [Member] \| Fair Value, Measurements, Recurring [Member] \| Residential [Member] \| Agency [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	28,079		40,314
Level 2 [Member] \| Fair Value, Measurements, Recurring [Member] \| Commercial [Member] \| Commercial Mortgage-backed Agency Securities [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	132		140
Level 2 [Member] \| Fair Value, Measurements, Recurring [Member] \| Asset backed Securities [Member] \| Collateralized Loan Obligations [Member]
Assets, Fair Value Disclosure
Available-for-sale securities			86
Level 2 [Member] \| Fair Value, Measurements, Recurring [Member] \| Asset backed Securities [Member] \| Other [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	584		564
Level 3 [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	1,769		1,893
Mortgage servicing rights	1,594		1,519
Derivative assets	1,404		1,281
Total	4,767		4,693
Liabilities, Fair Value Disclosure
Derivative liabilities	44		53
Total	44		53
Level 3 [Member] \| Fair Value, Measurements, Recurring [Member] \| Corporate Debt Securities [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	9		9
Level 3 [Member] \| Fair Value, Measurements, Recurring [Member] \| Residential [Member] \| Residential Non-agency Prime [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	713		803
Level 3 [Member] \| Fair Value, Measurements, Recurring [Member] \| Residential [Member] \| Residential Non-agency Non-Prime [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	796		802
Level 3 [Member] \| Fair Value, Measurements, Recurring [Member] \| Commercial [Member] \| Commercial Mortgage-backed Non-Agency Securities [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	37		42
Level 3 [Member] \| Fair Value, Measurements, Recurring [Member] \| Asset backed Securities [Member] \| Collateralized Loan Obligations [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	102		120
Level 3 [Member] \| Fair Value, Measurements, Recurring [Member] \| Asset backed Securities [Member] \| Other [Member]
Assets, Fair Value Disclosure
Available-for-sale securities	112		117
Netting [Member] \| Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure
Derivative assets	(321)		(294)
Total	(321)		(294)
Liabilities, Fair Value Disclosure
Derivative liabilities	(875)		(1,889)
Total	$ (875)		$ (1,889)