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Consolidated Balance Sheet (Parenthetical) - $ / shares
shares in Millions
Sep. 30, 2020
Sep. 30, 2019
Shareowners' equity:    
Common stock, shares issued (in shares) 181.4 181.4
Treasury stock, shares held (in shares) 65.2 65.7
Common stock, par value per share (in dollars per share) $ 1.00 $ 1