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Restructuring Plans - Narrative (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Restructuring Cost and Reserve [Line Items]        
Pre-tax employee termination and restructuring costs $ 4.9 $ 0 $ 10.5 $ 0.3
Gaming
       
Restructuring Cost and Reserve [Line Items]        
Number of immaterial business lines with exit costs     2