Goodwill and Purchased Intangible Assets (Details 3) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2015	Sep. 30, 2015
Purchased intangible assets
Weighted-Average Life (in years)	14 years 6 months	14 years 6 months
Gross	$ 781.2	$ 783.4
Accumulated Amortization	(575.9)	(564.5)
Net	205.3	218.9
Non-amortizable trade names	387.8	387.8
Intangible assets excluding goodwill, gross	1,169.0	1,171.2
Purchased intangible assets, net	593.1	$ 606.7
Future amortization expense of purchased intangible assets for the five years succeeding fiscal year 2016
2016	39.2
2017	45.8
2018	38.3
2019	36.9
2020	11.1
2021	$ 5.3
Distribution network
Purchased intangible assets
Weighted-Average Life (in years)	39 years 1 month	39 years 1 month
Gross	$ 55.4	$ 55.4
Accumulated Amortization	(26.9)	(26.6)
Net	$ 28.5	$ 28.8
Non-compete
Purchased intangible assets
Weighted-Average Life (in years)	10 years 6 months	10 years 6 months
Gross	$ 56.4	$ 56.4
Accumulated Amortization	(56.4)	(56.3)
Net	$ 0.0	$ 0.1
Technology-related
Purchased intangible assets
Weighted-Average Life (in years)	11 years 11 months	11 years 11 months
Gross	$ 104.8	$ 104.8
Accumulated Amortization	(85.4)	(83.3)
Net	$ 19.4	$ 21.5
Customer relationships
Purchased intangible assets
Weighted-Average Life (in years)	12 years 10 months	12 years 10 months
Gross	$ 548.1	$ 550.3
Accumulated Amortization	(392.8)	(384.0)
Net	$ 155.3	$ 166.3
Other
Purchased intangible assets
Weighted-Average Life (in years)	16 years 5 months	16 years 6 months
Gross	$ 16.5	$ 16.5
Accumulated Amortization	(14.4)	(14.3)
Net	$ 2.1	$ 2.2