Goodwill and Other Intangible Assets (Details 1) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Sep. 30, 2012
Other intangible assets
Amortized intangible assets, carrying amount	$ 352.4	$ 338.4
Amortized intangible assets, accumulated amortization	185.7	172.6
Amortized intangible assets, net	166.7	165.8
Intangible assets not subject to amortization	43.7	43.7
Total other intangible assets, carrying amount	396.1	382.1
Total other intangible assets, net	210.4	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	133.3	123.4
Amortized intangible assets, accumulated amortization	67.8	61.2
Amortized intangible assets, net	65.5	62.2
Customer relationships [Member]
Other intangible assets
Amortized intangible assets, carrying amount	76.3	72.6
Amortized intangible assets, accumulated amortization	33.2	30.7
Amortized intangible assets, net	43.1	41.9
Technology [Member]
Other intangible assets
Amortized intangible assets, carrying amount	90.6	88.9
Amortized intangible assets, accumulated amortization	53.3	50.9
Amortized intangible assets, net	37.3	38.0
Trademarks [Member]
Other intangible assets
Amortized intangible assets, carrying amount	30.2	32.1
Amortized intangible assets, accumulated amortization	13.9	12.9
Amortized intangible assets, net	16.3	19.2
Other [Member]
Other intangible assets
Amortized intangible assets, carrying amount	22.0	21.4
Amortized intangible assets, accumulated amortization	17.5	16.9
Amortized intangible assets, net	$ 4.5	$ 4.5