Goodwill and Other Intangible Assets (Details 1) (USD $) In Millions	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Other intangible assets
Amortized intangible assets, carrying amount	$ 311.5	$ 359.6
Amortized intangible assets, accumulated amortization	137.2	186.0
Amortized intangible assets, net	174.3	173.6
Intangible assets not subject to amortization	43.7	43.7
Total other intangible assets, carrying amount	355.2	403.3
Total other intangible assets, net	218.0	217.3
Goodwill and Other Intangible Assets (Textuals) [Abstract]
Estimated amortization expense in 2012	36.0
Estimated amortization expense in 2013	32.3
Estimated amortization expense in 2014	27.0
Estimated amortization expense in 2015	21.4
Estimated amortization expense in 2016	16.8
Computer software products [Member]
Other intangible assets
Amortized intangible assets, carrying amount	101.2	160.1
Amortized intangible assets, accumulated amortization	45.3	107.3
Amortized intangible assets, net	55.9	52.8
Computer software products amortization expense	16.8	13.6	15.8
Customer relationships [Member]
Other intangible assets
Amortized intangible assets, carrying amount	72.4	59.6
Amortized intangible assets, accumulated amortization	23.2	16.6
Amortized intangible assets, net	49.2	43.0
Technology [Member]
Other intangible assets
Amortized intangible assets, carrying amount	85.1	83.8
Amortized intangible assets, accumulated amortization	44.0	38.0
Amortized intangible assets, net	41.1	45.8
Trademarks [Member]
Other intangible assets
Amortized intangible assets, carrying amount	31.2	32.5
Amortized intangible assets, accumulated amortization	9.0	7.6
Amortized intangible assets, net	22.2	24.9
Other [Member]
Other intangible assets
Amortized intangible assets, carrying amount	21.6	23.6
Amortized intangible assets, accumulated amortization	15.7	16.5
Amortized intangible assets, net	$ 5.9	$ 7.1