Note 7 - Goodwill and Other Intangibles (Detail) - Other Intangibles (USD $) In Millions, unless otherwise specified	9 Months Ended
	Jun. 30, 2012
Business Combinations [Member] | Developed Technology [Member]
Finite Lived Intangible Assets Acquired	$ 51.8
Business Combinations [Member] | Customer Relationship [Member]
Finite Lived Intangible Assets Acquired	47.3
Business Combinations [Member] | Trademark [Member]
Finite Lived Intangible Assets Acquired	10.9
Business Combinations [Member]
Finite Lived Intangible Assets Acquired	110.0
Other Additions [Member] | Patents [Member]
Finite Lived Intangible Assets Acquired	1.0
Other Additions [Member] | Reacquired Rights [Member]
Finite Lived Intangible Assets Acquired	1.3
Other Additions [Member]
Finite Lived Intangible Assets Acquired	$ 2.3
Patents [Member]
Weighted Average Life	4 years
Developed Technology [Member]
Weighted Average Life	6 years
Customer Relationship [Member]
Weighted Average Life	4 years
Trademark [Member]
Weighted Average Life	5 years
Reacquired Rights [Member]
Weighted Average Life	2 years