Goodwill and Other Intangible Assets (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012
Other intangible assets
Amortized intangible assets, carrying amount	$ 354.5	$ 338.4
Amortized intangible assets, accumulated amortization	181.4	172.6
Amortized intangible assets, net	173.1	165.8
Intangible assets not subject to amortization	43.7	43.7
Total other intangible assets, carrying amount	398.2	382.1
Total other intangible assets, net	216.8	209.5
Goodwill and Other Intangible Assets (Textual) [Abstract]
Estimated amortization expense in 2013	32.6
Estimated amortization expense in 2014	34.2
Estimated amortization expense in 2015	28.5
Estimated amortization expense in 2016	24.9
Estimated amortization expense in 2017	20.9
Computer software products [Member]
Other intangible assets
Amortized intangible assets, carrying amount	127.4	123.4
Amortized intangible assets, accumulated amortization	64.5	61.2
Amortized intangible assets, net	62.9	62.2
Customer relationships [Member]
Other intangible assets
Amortized intangible assets, carrying amount	80.2	72.6
Amortized intangible assets, accumulated amortization	32.9	30.7
Amortized intangible assets, net	47.3	41.9
Technology [Member]
Other intangible assets
Amortized intangible assets, carrying amount	92.2	88.9
Amortized intangible assets, accumulated amortization	52.8	50.9
Amortized intangible assets, net	39.4	38.0
Trademarks [Member]
Other intangible assets
Amortized intangible assets, carrying amount	32.2	32.1
Amortized intangible assets, accumulated amortization	13.8	12.9
Amortized intangible assets, net	18.4	19.2
Other [Member]
Other intangible assets
Amortized intangible assets, carrying amount	22.5	21.4
Amortized intangible assets, accumulated amortization	17.4	16.9
Amortized intangible assets, net	$ 5.1	$ 4.5