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Debt (Details)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2014
Nov. 20, 2014
USD ($)
Term Loan and Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Maximum debt to equity ratio under covenants 0.40    
Term Loan and Revolving Credit Facility [Member] | Base Rate [Member]      
Debt Instrument [Line Items]      
Basis spread on variable rate 0.00%    
Term Loan and Revolving Credit Facility [Member] | Minimum [Member] | Eurocurrency [Member]      
Debt Instrument [Line Items]      
Basis spread on variable rate 0.75%    
Term Loan and Revolving Credit Facility [Member] | Minimum [Member] | Eurocurrency Without Debt Ratings [Member]      
Debt Instrument [Line Items]      
Basis spread on variable rate 0.875%    
Term Loan and Revolving Credit Facility [Member] | Maximum [Member] | Eurocurrency [Member]      
Debt Instrument [Line Items]      
Basis spread on variable rate 1.125%    
Term Loan and Revolving Credit Facility [Member] | Maximum [Member] | Eurocurrency Without Debt Ratings [Member]      
Debt Instrument [Line Items]      
Basis spread on variable rate 1.00%    
Term Loan [Member]      
Debt Instrument [Line Items]      
Principal amount of debt     $ 1,000,000,000
Interest rate at period end 1.80%    
Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Line of credit, maximum borrowing capacity     $ 750,000,000
Line of Credit Facility, Maximum Period Drawn Notes Have Been Outstanding   90 days