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Consolidated Statements of Cash Flows (Parenthetical) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2010 Segment, Discontinued Operations [Member]	Dec. 31, 2009 Segment, Discontinued Operations [Member]	Dec. 31, 2008 Segment, Discontinued Operations [Member]
Sale of premises and equipment	$ 16	$ 9	$ 50
Cash and cash equivalents at beginning of year	$ 16,356	$ 16,599	$ 21,654	$ 0	$ 0	$ 3

The sum of cash and cash equivalents plus Federal Funds Sold. Cash and cash equivalents consist of short term, highly liquid investments that are readily convertible to known amounts of cash and are so near their maturity that they present negligible risk of changes in value due to changes in interest rates -- usually with an original maturity less than 90 days.

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- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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