IncomeTaxes (Details 3) (USD $) In Millions	12 Months Ended
Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Reconciliation of the beginning and ending amount of unrecognized tax benefits
Balance at January 1,	$ 6,608	$ 5,894	$ 4,811
Increases based on tax positions related to the current period	813	584	890
Decreases based on tax positions related to the current period	(24)	(6)	(109)
Increases associated with the Bear Stearns merger	0		1,387
Increases based on tax positions related to prior periods	1,681	703	501
Decreases based on tax positions related to prior periods	(1,198)	(322)	(1,386)
Decreases related to settlements with taxing authorities	(74)	(203)	(181)
Decreases related to a lapse of applicable statute of limitations	(39)	(42)	(19)
Balance at December 31	$ 7,767	$ 6,608	$ 5,894

Reconciliation of the beginning and ending amount of unrecognized tax benefits.

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The gross amount of increases in unrecognized tax benefits resulting from the Bear Stearns merger, excluding amounts pertaining to examined tax returns.

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The gross amount of unrecognized tax benefits (tax reductions recognized in financial reports but excluded from tax returns) pertaining to uncertain tax positions taken in tax returns as of the beginning balance sheet date, excluding amounts pertaining to examined tax returns.

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The gross amount of decreases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns.

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The gross amount of decreases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.

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The gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities.

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The gross amount of increases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns.

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The gross amount of decreases in unrecognized tax benefits resulting from lapses of the applicable statutes of limitations.

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