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Subsequent Events (Details)
Jul. 31, 2015
EUR (€)
Mar. 26, 2015
USD ($)
Sep. 25, 2013
USD ($)
Senior Secured Credit Facility [Member]      
Subsequent Event [Line Items]      
Maximum borrowing capacity under credit facility | $   $ 1,800,000,000 $ 1,000,000,000
Subsequent Event [Member]      
Subsequent Event [Line Items]      
Commercial paper € 1,000,000    
Subsequent Event [Member] | Commercial Paper [Member] | Minimum [Member]      
Subsequent Event [Line Items]      
Maturity period of debt 1 day    
Subsequent Event [Member] | Commercial Paper [Member] | Maximum [Member]      
Subsequent Event [Line Items]      
Maturity period of debt 183 days