Note 8 - Goodwill and Other Intangibles (Detail) - Additions to intangible assets (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2012
Business Combinations [Member] | Developed Technology Rights [Member]
Acquired Finite Lived Intangible Assets	51.8
Business Combinations [Member] | Customer Relationships [Member]
Acquired Finite Lived Intangible Assets	47.3
Business Combinations [Member] | Trademarks [Member]
Acquired Finite Lived Intangible Assets	10.9
Business Combinations [Member]
Acquired Finite Lived Intangible Assets	110.0
Other Additions [Member] | Patents [Member]
Acquired Finite Lived Intangible Assets	1.3
Other Additions [Member] | Contracts [Member]
Acquired Finite Lived Intangible Assets	0.2
Other Additions [Member] | Reacquired Rights [Member]
Acquired Finite Lived Intangible Assets	1.3
Other Additions [Member]
Acquired Finite Lived Intangible Assets	2.8
Weighted Average Life [Member] | Patents [Member]
Weighted Average Life (Years)	4 years
Weighted Average Life [Member] | Developed Technology Rights [Member]
Weighted Average Life (Years)	6 years
Weighted Average Life [Member] | Contracts [Member]
Weighted Average Life (Years)	1 year
Weighted Average Life [Member] | Reacquired Rights [Member]
Weighted Average Life (Years)	2 years
Weighted Average Life [Member] | Customer Relationships [Member]
Weighted Average Life (Years)	4 years
Weighted Average Life [Member] | Trademarks [Member]
Weighted Average Life (Years)	5 years