v2.4.0.6
Consolidated Balance Sheet (Parenthetical) (USD $)
In Millions, except Share data, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Marketable securities $ 232 [1] $ 602 [1]
Allowance for accounts and notes receivable $ 30 [1] $ 32 [1]
Common stock, shares authorized 2,500,000,000 [1] 2,500,000,000 [1]
Common stock, par value $ 0.01 [1] $ 0.01 [1]
Common stock, shares issued 1,749,550,587 [1] 1,740,529,279 [1]
Grantor trusts, shares   36,890,375 [1]
Treasury stock, shares 463,880,628 [1] 272,873,537 [1]
[1] Certain amounts have been restated to reflect a prior period adjustment. See Note 21-Accumulated Other Comprehensive Income, in the Notes to Consolidated Financial Statements.