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Condensed Consolidated Statements Of Stockholders' Equity (Parenthetical) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Statement of Stockholders' Equity [Abstract]  
Foreign currency translation adjustments, tax $ (4)
Amortization of retirement benefit adjustments, tax $ 26
Dividends declared, per share $ 0.22