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CONSOLIDATED BALANCE SHEET (Parenthetical) - $ / shares
shares in Millions
Sep. 30, 2018
Dec. 31, 2017
CONSOLIDATED BALANCE SHEET    
Common stock, shares authorized 800.0 800.0
Common stock, par value per share (in dollars per share) $ 1.00 $ 1.00
Common stock, shares outstanding 288.9 289.3