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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares
Jun. 30, 2020
Sep. 30, 2019
Statement of Financial Position [Abstract]    
Common stock, par value (usd per share) $ 2.5 $ 2.5
Common stock, shares authorized (in shares) 150,000,000 150,000,000
Common stock, shares outstanding (in shares) 95,830,500 89,998,788
Treasury stock at cost and other, shares (in shares) 260,462 660,734