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Consolidated Statements of Financial Position (Parenthetical) (Parentheticals) (USD $)
In Millions, except Share data, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Allowance for doubtful accounts $ 55 $ 62
Common stock, par value $ 0 $ 0
Common stock, shares authorized 400,000,000 400,000,000
Common stock, shares issued 177,087,230 172,351,680
Common stock, shares outstanding 177,087,230 172,351,680