Fair Value Option (Details) (USD $) In Millions	3 Months Ended
Mar. 31, 2011	Mar. 31, 2010	Dec. 31, 2010
Changes in fair value under the fair value option election [Abstract]
Federal funds sold and securities purchased under resale agreements	$ (118)	$ 19
Securities borrowed	9	12
Trading assets:
Debt and equity instruments, excluding loans	167	157
Loans reported as trading assets:
Changes in instrument-specific credit risk	480	403
Other changes in fair value	848	371
Loans:
Changes in instrument-specific credit risk	(6)	47
Other changes in fair value	143	(27)
Other assets	0	(53)
Deposits	(17)	(189)
Federal funds purchased and securities loaned or sold under repurchase agreements	35	(9)
Other borrowed funds	217	74
Trading liabilities	(3)	(3)
Beneficial interests issued by consolidated VIEs	(34)	46
Other liabilities	(5)	23
Long-term debt:
Changes in instrument-specific credit risk	54	51
Other changes in fair value	(24)	226
Long-term debt
Long-term Debt	269,616		270,653
Total long-term debt	0		0
Fair Value Option (Numeric) [Abstract]
Changes in instrument-specific credit risk related to structured notes	23	108
Trading assets [Member] \| Contractual principal outstanding [Member]
Loans
Performing loans 90 days or more past due	0		0
Nonaccrual loans	5,632		5,246
All other performing loans	38,107		39,490
Contractual principal outstanding [Member]
Loans
Nonaccrual loans	6,524		6,173
Total loans	46,877		48,159
Long-term debt
Total long-term debt	0		0
Long-term beneficial interests
Total long-term beneficial interests	0		0
Contractual principal outstanding [Member] \| Principal Protected Debt [Member]
Long-term debt
Long-term Debt	19,820		20,761
Long-term beneficial interests
Total long-term beneficial interests	0		49
Contractual principal outstanding [Member] \| Non Principal Protected Debt [Member]
Long-term debt
Long-term Debt	0		0
Long-term beneficial interests
Total long-term beneficial interests	0		0
Contractual principal outstanding [Member] \| Total loans [Member]
Loans
Performing loans 90 days or more past due	0		0
Nonaccrual loans	892		927
All other performing loans	2,246		2,496
Trading assets [Member] \| Fair value [Member]
Loans
Performing loans 90 days or more past due	0		0
Nonaccrual loans	1,509		1,239
All other performing loans	32,740		33,641
Fair value [Member]
Loans
Nonaccrual loans	1,569		1,371
Total loans	35,584		36,446
Long-term debt
Total long-term debt	37,915		38,839
Long-term beneficial interests
Total long-term beneficial interests	1,276		1,495
Fair value [Member] \| Principal Protected Debt [Member]
Long-term debt
Long-term Debt	20,207		21,315
Long-term beneficial interests
Total long-term beneficial interests	0		49
Fair value [Member] \| Non Principal Protected Debt [Member]
Long-term debt
Long-term Debt	17,708		17,524
Long-term beneficial interests
Total long-term beneficial interests	1,276		1,446
Fair value [Member] \| Total loans [Member]
Loans
Performing loans 90 days or more past due	0		0
Nonaccrual loans	60		132
All other performing loans	1,275		1,434
Trading assets [Member] \| Fair value over/(under) contractual principal outstanding [Member]
Loans
Performing loans 90 days or more past due	0		0
Nonaccrual loans	(4,123)		(4,007)
All other performing loans	(5,367)		(5,849)
Fair value over/(under) contractual principal outstanding [Member]
Loans
Nonaccrual loans	(4,955)		(4,802)
Total loans	(11,293)		(11,713)
Long-term beneficial interests
Total long-term beneficial interests	0		0
Fair value over/(under) contractual principal outstanding [Member] \| Principal Protected Debt [Member]
Long-term debt
Long-term Debt	387		554
Long-term beneficial interests
Total long-term beneficial interests	0		0
Fair value over/(under) contractual principal outstanding [Member] \| Non Principal Protected Debt [Member]
Long-term debt
Long-term Debt	0		0
Long-term beneficial interests
Total long-term beneficial interests	0		0
Fair value over/(under) contractual principal outstanding [Member] \| Total loans [Member]
Loans
Performing loans 90 days or more past due	0		0
Nonaccrual loans	(832)		(795)
All other performing loans	(971)		(1,062)
Principal transactions [Member]
Changes in fair value under the fair value option election [Abstract]
Federal funds sold and securities purchased under resale agreements	(118)	19
Securities borrowed	9	12
Trading assets:
Debt and equity instruments, excluding loans	164	156
Loans reported as trading assets:
Changes in instrument-specific credit risk	480	409
Other changes in fair value	125	(384)
Loans:
Changes in instrument-specific credit risk	(6)	47
Other changes in fair value	143	(27)
Other assets	0	0
Deposits	(17)	(189)
Federal funds purchased and securities loaned or sold under repurchase agreements	35	(9)
Other borrowed funds	217	74
Trading liabilities	(3)	(3)
Beneficial interests issued by consolidated VIEs	(34)	46
Other liabilities	(3)	23
Long-term debt:
Changes in instrument-specific credit risk	54	51
Other changes in fair value	(24)	226
Other income [Member]
Changes in fair value under the fair value option election [Abstract]
Federal funds sold and securities purchased under resale agreements	0	0
Securities borrowed	0	0
Trading assets:
Debt and equity instruments, excluding loans	3	1
Loans reported as trading assets:
Changes in instrument-specific credit risk	0	(6)
Other changes in fair value	723	755
Loans:
Changes in instrument-specific credit risk	0	0
Other changes in fair value	0	0
Other assets	0	(53)
Deposits	0	0
Federal funds purchased and securities loaned or sold under repurchase agreements	0	0
Other borrowed funds	0	0
Trading liabilities	0	0
Beneficial interests issued by consolidated VIEs	0	0
Other liabilities	(2)	0
Long-term debt:
Changes in instrument-specific credit risk	0	0
Other changes in fair value	0	0
Letters of Credit Hedged By Derivative Transactions [Member] \| Other Guarantees and Commitments [Member]
Fair Value Option (Numeric) [Abstract]
Contractual amount	3,809		3,766
Carrying value	(6)		(6)
Other Guarantees and Commitments [Member]
Fair Value Option (Numeric) [Abstract]
Contractual amount	6,373		6,492
Carrying value	$ (6)		$ (6)

Changes in fair value related to beneficial interests issued by consolidated VIEs for which the fair value election was made.

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- Definition

This item represents the estimated amount of gains and losses from fair value changes included in earnings that are attributable to changes in the instrument-specific credit risk of Long-term Debt with fair values that have been significantly affected during the reporting period by changes in the instrument-specific credit risk.

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This item represents the estimated amount of gains or losses included in earnings during the period attributable to changes in instrument-specific credit risk arising from loans.

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This item represents the estimated amount of gains and losses from fair value changes included in earnings that are attributable to changes in the instrument-specific credit risk of structured notes with fair values that have been significantly affected during the reporting period by changes in the instrument-specific credit risk.

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Changes in fair value related to debt and equity trading securities for which the fair value election was made.

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- Definition

Changes in fair value related to deposits for which the fair value election was made.

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- Definition

Changes in fair value related to federal funds purchased and securities loaned or sold under repurchase agreements for which the fair value election was made.

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- Definition

Changes in fair value related to federal funds sold and securities purchased under resale agreements for which the fair value election was made.

+ Details

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- Definition

This item represents loans held as assets that are 90 days or more past due for which the fair value option has been elected.

+ Details

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- Definition

This item represents loans held as assets that are in nonaccrual status for which the fair value option has been elected, if the entity's policy is to recognize interest income separately from other changes in fair value.

+ Details

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- Definition

Other Changes In Fair Value of loans for which the fair value election was made.

+ Details

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- Definition

This item represents the estimated amount of gains or losses included in earnings during the period attributable to changes in instrument-specific credit risk arising from loans reported as trading assets.

+ Details

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- Definition

Other changes in fair value of loans reported as trading assets for which the fair value election was made.

+ Details

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- Definition

Represents the portion of long-term debt for which the fair value option has been elected, valued at fair value.

+ Details

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- Definition

Changes In the fair value of long term debt related to factors other than instrument-specific credit risk.

+ Details

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- Definition

Fair Value Option Numeric.

+ Details

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- Definition

This item represents the changes in fair value for other assets for which the fair value election was made that are not otherwise specified in the taxonomy.

+ Details

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- Definition

Changes in fair value related to other borrowed funds for which the fair value election was made.

+ Details

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- Definition

Changes in fair value related to other liabilities not otherwise specified in the taxonomy for which the fair value election was made.

+ Details

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- Definition

Changes in fair value related to securities borrowed for which the fair value election was made.

+ Details

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- Definition

Represents the portion of loans held as assets for which the fair value option has been elected, valued at fair value.

+ Details

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- Definition

Fair Value Options Other Performing Loans.

+ Details

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- Definition

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

+ Details

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Period Type:	instant

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor or committed party could be required to make under the guarantee or commitment or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Loans reported as trading assets.

+ Details

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- Definition

Long Term Beneficial Interests.

+ Details

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- Definition

Long term beneficial interests.

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- Definition

Trading liabilities, change in fair value.

+ Details

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- Definition

This item represents the aggregate fair value of loans held as assets that are 90 days or more past due for which the fair value option has been elected.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph e(1)

+ Details

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- Definition

This item represents the aggregate fair value of loans held as assets that are in nonaccrual status for which the fair value option has been elected, if the entity's policy is to recognize interest income separately from other changes in fair value.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph e(2)

+ Details

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- Details

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- Definition

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 7

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20, 22

-Article 5

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- Details

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