Supplemental Statement of Operations and Other Comprehensive Income Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Interest expense, net:
Interest expense	$ 60.2	$ 65.9	$ 68.3
Deferred financing fees amortization	2.3	2.3	2.9
Other interest expense	1.5	2.7	3.4
Interest income	(0.3)	(0.3)	(0.3)
Interest expense, net	59.9	65.6	68.0
7.375% Senior Subordinated Notes [Member]
Interest expense, net:
Interest expense	31.0	31.0	31.0
8.75% Senior Unsecured Notes [Member]
Interest expense, net:
Interest expense	19.3	20.0	2.0
2007 Credit Agreement, Including Swap Contracts [Member]
Interest expense, net:
Interest expense	5.0	8.0	28.8
ABL Agreement [Member]
Interest expense, net:
Interest expense	1.1	1.9	0.2
Selling, General and Administrative [Member]
Included in selling, general and administrative expenses:
Research and development	12.7	9.9	7.8
Advertising	$ 4.9	$ 4.3	$ 4.1