Restructuring Charges (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Mar. 31, 2013	Mar. 31, 2013 December 2012 Plan [Member]	Mar. 31, 2013 December 2012 Plan [Member] Restructuring-related charges [Member]	Mar. 31, 2013 Asset impairment charge [Member] December 2012 Plan [Member]	Mar. 31, 2013 Workforce reduction [Member] December 2012 Plan [Member]	Mar. 31, 2013 Other charges [Member] December 2012 Plan [Member]	Mar. 31, 2013 Restructuring and impairment charges [Member] December 2012 Plan [Member]	Mar. 31, 2013 Inventory write-down [Member] December 2012 Plan [Member]	Mar. 31, 2013 Equipment relocation [Member] December 2012 Plan [Member]	Mar. 31, 2013 Other costs [Member] December 2012 Plan [Member]
Restructuring and restructuring-related charges of actual costs
Planned Costs		$ 4.1	$ 1.0	$ 1.1	$ 1.7	$ 0.3	$ 3.1	$ 0.5	$ 0.1	$ 0.4
Actual incurred through	$ 0.8	$ 4.2	$ 0.9	$ 1.1	$ 1.8	$ 0.4	$ 3.3	$ 0.5	$ 0.3	$ 0.1