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CONDENSED CONSOLIDATED BALANCE SHEETS Parentheticals - USD ($)
shares in Millions, $ in Millions
Mar. 31, 2017
Dec. 31, 2016
Allowance for Doubtful Accounts $ 446 $ 466
Accumulated Depreciation $ 10,298 $ 10,621
Common Stock - Par Value $ 0.25 $ 0.25
Common Stock - Shares Authorized 11,200 11,200
Common Stock - Issued 7,040 7,040
Treasury Stock - Cost 2,767 2,752