Goodwill and Other Intangible Assets (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2011	Sep. 30, 2011
Other intangible assets
Amortized intangible assets, carrying amount	$ 314.4	$ 311.5
Amortized intangible assets, accumulated amortization	145.3	137.2
Amortized intangible assets, net	169.1	174.3
Intangible assets not subject to amortization	43.7	43.7
Total other intangible assets, carrying amount	358.1	355.2
Total other intangible assets, net	212.8	218.0
Goodwill and Other Intangible Assets (Textual) [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	105.6	101.2
Amortized intangible assets, accumulated amortization	49.2	45.3
Amortized intangible assets, net	56.4	55.9
Customer relationships [Member]
Other intangible assets
Amortized intangible assets, carrying amount	71.4	72.4
Amortized intangible assets, accumulated amortization	24.7	23.2
Amortized intangible assets, net	46.7	49.2
Technology [Member]
Other intangible assets
Amortized intangible assets, carrying amount	85.0	85.1
Amortized intangible assets, accumulated amortization	45.6	44.0
Amortized intangible assets, net	39.4	41.1
Trademarks [Member]
Other intangible assets
Amortized intangible assets, carrying amount	31.1	31.2
Amortized intangible assets, accumulated amortization	9.9	9.0
Amortized intangible assets, net	21.2	22.2
Other [Member]
Other intangible assets
Amortized intangible assets, carrying amount	21.3	21.6
Amortized intangible assets, accumulated amortization	15.9	15.7
Amortized intangible assets, net	$ 5.4	$ 5.9