Goodwill and Other Intangible Assets (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Other intangible assets
Amortized intangible assets, carrying amount	$ 338.4	$ 311.5
Amortized intangible assets, accumulated amortization	172.6	137.2
Amortized intangible assets, net	165.8	174.3
Computer software products amortization expense	34.7	34.8	31.6
Intangible assets not subject to amortization	43.7	43.7
Total other intangible assets, carrying amount	382.1	355.2
Total other intangible assets, net	209.5	218.0
Goodwill and Other Intangible Assets (Textuals) [Abstract]
Estimated amortization expense in 2013	31.1
Estimated amortization expense in 2014	32.7
Estimated amortization expense in 2015	27.0
Estimated amortization expense in 2016	23.4
Estimated amortization expense in 2017	19.4
Computer software products [Member]
Other intangible assets
Amortized intangible assets, carrying amount	123.4	101.2
Amortized intangible assets, accumulated amortization	61.2	45.3
Amortized intangible assets, net	62.2	55.9
Computer software products amortization expense	15.9	16.8	13.6
Customer relationships [Member]
Other intangible assets
Amortized intangible assets, carrying amount	72.6	72.4
Amortized intangible assets, accumulated amortization	30.7	23.2
Amortized intangible assets, net	41.9	49.2
Technology [Member]
Other intangible assets
Amortized intangible assets, carrying amount	88.9	85.1
Amortized intangible assets, accumulated amortization	50.9	44.0
Amortized intangible assets, net	38.0	41.1
Trademarks [Member]
Other intangible assets
Amortized intangible assets, carrying amount	32.1	31.2
Amortized intangible assets, accumulated amortization	12.9	9.0
Amortized intangible assets, net	19.2	22.2
Other [Member]
Other intangible assets
Amortized intangible assets, carrying amount	21.4	21.6
Amortized intangible assets, accumulated amortization	16.9	15.7
Amortized intangible assets, net	$ 4.5	$ 5.9