CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares	Dec. 31, 2016	Sep. 30, 2016
Statement of Financial Position [Abstract]
Common stock, par value (usd per share)	$ 2.50	$ 2.50
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares outstanding	86,196,239	86,086,355
Treasury stock at cost and other, shares	2,664,765	2,575,139