Consolidated Statements Of Shareholders' Equity (USD $) In Millions	Common Stock [Member]	Additional Paid-In Capital [Member]	Common Stock In Treasury [Member]	Retained Earnings [Member]	Accum. Other Comprehensive Income (Loss) [Member]	Total
Balance at Sep. 30, 2008	$ 0.6	$ 1,919.6	$ (257.3)	$ 768.9	$ (20.3)	$ 2,411.5
Net earnings (loss)				290.4		290.4
Benefit plan adjustment, net					(20.7)	(20.7)
Cash flow hedging adjustments, net					3.2	3.2
Foreign currency translation adjustment					(3.1)	(3.1)
Comprehensive income (loss)						269.8
Activity under stock and deferred compensation plans		(0.4)	12.5			12.1
Stock-based compensation expense		12.2				12.2
Balance at Sep. 30, 2009	0.6	1,931.4	(244.8)	1,059.3	(40.9)	2,705.6
Net earnings (loss)				208.8		208.8
Benefit plan adjustment, net					(12.0)	(12.0)
Cash flow hedging adjustments, net					4.6	4.6
Foreign currency translation adjustment					12.4	12.4
Comprehensive income (loss)						213.8
Purchases of treasury stock			(115.5)			(115.5)
Activity under stock and deferred compensation plans		(4.7)	11.5			6.8
Stock-based compensation expense		18.5				18.5
Balance at Sep. 30, 2010	0.6	1,945.2	(348.8)	1,268.1	(35.9)	2,829.2
Net earnings (loss)				(187.2)		(187.2)
Benefit plan adjustment, net					(22.3)	(22.3)
Cash flow hedging adjustments, net					(18.7)	(18.7)
Foreign currency translation adjustment					(3.8)	(3.8)
Comprehensive income (loss)						(232.0)
Purchases of treasury stock			(1.5)			(1.5)
Activity under stock and deferred compensation plans		(1.5)	11.4			9.9
Stock-based compensation expense		13.6				13.6
Balance at Sep. 30, 2011	$ 0.6	$ 1,957.3	$ (338.9)	$ 1,080.9	$ (80.7)	$ 2,619.2