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Consolidated Statement of Changes in Shareholders equity (Parentheticals) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net unrealized holding gains on investment securities during period, tax expense	$ 154	$ 26	$ 187
Reclassification adjustment for net realized gains included in net earnings, tax expense	$ 41	$ 26	$ 4

Tax effect on the reclassification adjustment for gains or losses realized upon the sale of securities during the period.

Tax effect on gross appreciation or the gross loss in value of the total of unsold securities during the period being reported on.