Share-Based Compensation (Schedule Of Stock Options Awarded Under The Option Plans) (Details) (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended
	Jun. 30, 2012
Share-Based Compensation [Abstract]
Stock options Outstanding at October 1, 2011, Shares	435,054
Stock options Granted, Shares
Stock options Exercised, Shares	(94,636)
Stock options Cancelled / Expired, Shares	(206,066)
Stock options Outstanding at June 30, 2012, Shares	134,352
Stock options Exercisable at June 30, 2012, Shares	133,685
Stock options Outstanding at October 1, 2011, Weighted Average Price	$ 35.58
Stock options Granted, Weighted Average Price
Stock options Exercised, Weighted Average Price	$ 14.73
Stock options Cancelled / Expired, Weighted Average Price	$ 45.27
Stock options Outstanding at June 30, 2012, Weighted Average Price	$ 35.50
Stock options Exercisable at June 30, 2012, Weighted Average Price	$ 35.52
Stock options Exercised, Aggregate Intrinsic Value	$ 1.9
Stock options Outstanding at June 30, 2012, Aggregate Intrinsic Value	0.2
Stock options Exercisable at June 30, 2012, Aggregate Intrinsic Value	$ 0.2
Stock options Outstanding at June 30, 2012, Weighted Average Remaining Contractual Life, Years	1 year 1 month 6 days