Capital Stock (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Common shares as presented in the accompanying Consolidated Balance Sheets	30,358,864	30,247,512
Common shares in treasury	4,542,214	4,040,532
Board of Directors authorized an expanded stock repurchase program	$ 100.0
Stock repurchases during period, shares	517,000	350,000	270,000
Stock repurchased during period, value	$ 18.2	$ 12.0	$ 9.7