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Condensed Consolidated Statements Of Equity (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Statement of Stockholders' Equity [Abstract]
Unrealized gain on derivative instruments, tax	$ 7	$ (26)
Unrealized loss on certain investments, tax	0	1
Postretirement liability adjustment, tax	$ (402)	$ (303)
Common Stock, Dividends, Per Share, Declared	$ 0.88	$ 0.84

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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- Definition

Tax effect on the change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

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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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