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Significant Accounting Policies (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
item
Dec. 31, 2012
Dec. 31, 2011
Significant Accounting Policies [Line Items]      
Financing receivables as percentage of total assets 2.00%    
Advertising expense $ 41.7 $ 41.0 $ 55.3
Number of Operating Segments 2    
Typical maintenance revenue recognition period 12 months    
Period for recognition of differences between assumed and actual returns in market-related value 5 years    
Minimum [Member]
     
Significant Accounting Policies [Line Items]      
Software as a service and subscription services revenue contract period 3 years    
Minimum [Member] | Internal-Use Software [Member]
     
Significant Accounting Policies [Line Items]      
Property, plant and equipment, Useful Life (Years) 3 years    
Maximum [Member]
     
Significant Accounting Policies [Line Items]      
Software as a service and subscription services revenue contract period 5 years    
Maximum [Member] | Internal-Use Software [Member]
     
Significant Accounting Policies [Line Items]      
Property, plant and equipment, Useful Life (Years) 5 years