Acquisitions (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Acquisitions (Textuals) [Abstract]
Liabilities incurred			$ 10.9
Total purchase price	84.8		58.8
Goodwill	71.1		34.8
Customer relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Amount	7.1		14.3
Weighted average useful life (in years)	10 years		14 years
Technology-Based Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Amount	3.0	3.2	1.5
Weighted average useful life (in years)	5 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	$ 1.0		$ 0.6
Weighted average useful life (in years)	5 years		4 years