Allowance For Credit Losses - Lending Related Commitments (Details 1) (USD $) In Millions	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Allowance for lending-related commitments [Abstract]
Allowance for lending-related commitments at January 1	$ 717	$ 939
Provision for lending-related commitments	(89)	2
Other	(2)	(11)
Allowance for lending-related commitments at March 31	626	912
Allowance for lending related commitments by impairment methodology
Asset-specific	144	248
Formula-based	482	664
Allowance for lending-related commitments	626	912
Lending-related commitments by impairment methodology:
Total lending related commitments	965,963	944,493	958,709
Impaired collateral-dependent loans:
Net charge-offs	7,966	14,652
Impaired collateral dependent loans at fair value, less cost to sell	2,007	2,865
Impaired collateral-dependent loans [Member]
Impaired collateral-dependent loans:
Net charge-offs	112	524
Asset Specific [Member]
Lending-related commitments by impairment methodology:
Total lending related commitments	793	1,195
Asset Specific [Member] \| Wholesale
Lending-related commitments by impairment methodology:
Total lending related commitments	793	1,195
Asset Specific [Member] \| Consumer Excluding Credit Card
Lending-related commitments by impairment methodology:
Total lending related commitments	0	0
Asset Specific [Member] \| Credit Card
Lending-related commitments by impairment methodology:
Total lending related commitments	0	0
Formula Based [Member]
Lending-related commitments by impairment methodology:
Total lending related commitments	965,170	943,298
Formula Based [Member] \| Wholesale
Lending-related commitments by impairment methodology:
Total lending related commitments	364,896	323,357
Formula Based [Member] \| Consumer Excluding Credit Card
Lending-related commitments by impairment methodology:
Total lending related commitments	64,649	69,499
Formula Based [Member] \| Credit Card
Lending-related commitments by impairment methodology:
Total lending related commitments	535,625	550,442
Allowance for Lending Related Commitments [Member]
Allowance for lending-related commitments [Abstract]
Cumulative effect of changes in accounting principles	0	(18)
Allowance for Lending Related Commitments [Member] \| Wholesale
Allowance for lending-related commitments [Abstract]
Cumulative effect of changes in accounting principles	0	(18)
Allowance for Lending Related Commitments [Member] \| Consumer Excluding Credit Card
Allowance for lending-related commitments [Abstract]
Cumulative effect of changes in accounting principles	0	0
Allowance for Lending Related Commitments [Member] \| Credit Card
Allowance for lending-related commitments [Abstract]
Cumulative effect of changes in accounting principles	0	0
Wholesale
Allowance for lending-related commitments [Abstract]
Allowance for lending-related commitments at January 1	711	927
Provision for lending-related commitments	(89)	4
Other	(2)	(11)
Allowance for lending-related commitments at March 31	620	902
Allowance for lending related commitments by impairment methodology
Asset-specific	144	248
Formula-based	476	654
Allowance for lending-related commitments	620	902
Lending-related commitments by impairment methodology:
Total lending related commitments	365,689	324,552
Consumer Excluding Credit Card
Allowance for lending-related commitments [Abstract]
Allowance for lending-related commitments at January 1	6	12
Provision for lending-related commitments	0	(2)
Other	0	0
Allowance for lending-related commitments at March 31	6	10
Allowance for lending related commitments by impairment methodology
Asset-specific	0	0
Formula-based	6	10
Allowance for lending-related commitments	6	10
Lending-related commitments by impairment methodology:
Total lending related commitments	64,649	69,499
Credit Card
Allowance for lending-related commitments [Abstract]
Allowance for lending-related commitments at January 1	0	0
Provision for lending-related commitments	0	0
Other	0	0
Allowance for lending-related commitments at March 31	0	0
Allowance for lending related commitments by impairment methodology
Asset-specific	0	0
Formula-based	0	0
Allowance for lending-related commitments	0	0
Lending-related commitments by impairment methodology:
Total lending related commitments	$ 535,625	$ 550,442

Allowance For Lending Related Commitments Asset Specific.

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Allowance For Lending Related Commitments Formula Based.

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Components.

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Impaired collateral-dependent loans.

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Allowance For Lending Related Commitments.

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Lending-related commitments by impairment methodology.

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Reflects the carrying amount of impaired collateral dependent loans at fair value less cost to sell.

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The contractual amount of off-balance sheet lending-related financial instruments (e.g., commitments and guarantees), which represents the maximum possible credit risk should the counterparty draw upon the commitment or the entity be required to fulfill its obligation under the guarantee, and the counterparty subsequently fail to perform according to the terms of the contract.

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The sum of the periodic provision charged to operations, as well as any accounting policy conformity adjustment recorded in connection with a business combination transaction, based on an assessment of the collectibility of the lending related commitments (which are conditional contracts to lend money to a client in the future under specific terms) and the offset to which is either added to or deducted from the allowance account for the purpose of adjusting the portfolio to an amount that approximates net realizable value (the amount expected to be collected).

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Reflects the amount of loans and leases that have been removed, or charged off, from both loan receivables and the reserve for credit losses, typically because they are considered to be not salvageable or have been purchased by unconsolidated collection entities.

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Amount of the cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented.

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The provision charged to earnings in the period, the offset to which is either added to or deducted from the allowance account, for the purpose of reducing receivables, other than loans, leases, or credit losses, to an amount that approximates their net realizable value (the amount expected to be collected); includes provision for losses associated with foreclosed assets.

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Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

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