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Goodwill and Intangible Assets (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
Mar. 30, 2013
Sep. 30, 2012
Software Products Segment
    
Goodwill and acquired intangible assets $ 983.9 $ 768.1
Services Segment
    
Goodwill and acquired intangible assets $ 43.1 $ 28.1