Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Accumulated Other Comprehensive Income (Loss)
Unrealized net holding gains (losses) arising during the period on securities available for sale, Tax Effect	$ 74	$ 49
Reclassification adjustment for (gains) losses on securities available for sale included in net income, Tax Effect	3	0
Net change in amounts attributable to the FDIC under the loss share agreements, Tax Effect	(26)	(34)
Net change in unrecognized gains (losses) on cash flow hedges, Tax Effect	0	6
Net change in pension and postretirement liability, Tax Effect	7	3
Net change in other net, Tax Effect	$ 0	$ (1)

Tax effects of the increase (decrease) to accumulated comprehensive income during the period related to benefit plans. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

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Total tax effect of the change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. The change includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

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- Definition

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

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- Definition

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

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