v2.4.0.8
Goodwill and Acquired Intangible Assets (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Sep. 30, 2013
segments
Sep. 30, 2014
Number of reportable segments 2  
Estimated aggregate future amortization expense for intangible assets, 2014   $ 54.7
Estimated aggregate future amortization expense for intangible assets, 2015   51.2
Estimated aggregate future amortization expense for intangible assets, 2016   48.6
Estimated aggregate future amortization expense for intangible assets, 2017   46.3
Estimated aggregate future amortization expense for intangible assets, 2018   36.7
Estimated aggregate future amortization expense for intangible assets, thereafter   99.4
Software Products [Member]
    
Goodwill and acquired intangible assets 979.3 1,283.0
Services [Member]
    
Goodwill and acquired intangible assets $ 62.9 $ 66.4