Acquisitions (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Acquisitions (Textuals) [Abstract]
Liabilities incurred		$ 10.9
Total purchase price		58.8
Goodwill		34.8
Customer relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Amount		14.3
Weighted average useful life (in years)		14 years
Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Amount	3.2	1.5
Weighted average useful life (in years)	10 years	10 years
Trademarks [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Amount		1.3
Weighted average useful life (in years)		2 years
Other Intangible assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Amount		$ 0.6
Weighted average useful life (in years)		4 years