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Debt Senior Unsecured Notes (Details) - USD ($)
Sep. 28, 2017
Sep. 07, 2017
Senior Secured Credit Facility [Member] | Line of Credit [Member]    
Debt Instrument [Line Items]    
Debt Issuance Costs, Net   $ 9,000,000
Senior Unsecured Notes Due 2025 [Member] | Senior Notes    
Debt Instrument [Line Items]    
Senior notes issued $ 800,000,000  
Debt Instrument, Interest Rate, Stated Percentage 5.00%