Purchased Intangible Assets (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Acquired Indefinite-lived Intangible Assets [Line Items]
In process research and developement transfered to Developed Technology	$ 0.3	$ 1.0
Developed technology
Acquired Indefinite-lived Intangible Assets [Line Items]
Weighted average useful life for intangibles (years)		6 years 5 months 1 day
Customer relationships
Acquired Indefinite-lived Intangible Assets [Line Items]
Weighted average useful life for intangibles (years)		3 years 6 months 29 days
Other
Acquired Indefinite-lived Intangible Assets [Line Items]
Weighted average useful life for intangibles (years)		2 years 1 month 28 days