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Long-Term Debt - Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Oct. 15, 2015
Debt Instrument [Line Items]        
Repayments of long-term debt $ 331,595,000 $ 1,326,263,000    
Net investment hedge, (loss) gain (9,524,000) $ 54,046,000    
364 Day Facility        
Debt Instrument [Line Items]        
Principal amount of debt       $ 300,000,000
Repayments of long-term debt 300,000,000      
Five Year Facility        
Debt Instrument [Line Items]        
Principal amount of debt       $ 950,000,000
Repayments of long-term debt $ 31,000,000      
Commercial Paper        
Debt Instrument [Line Items]        
Weighted average interest rate 1.31%      
Debt instrument maturity period 21 days      
1.875% Senior Notes        
Debt Instrument [Line Items]        
Debt instrument, interest rate 1.875%   1.875%  
Long-Term Debt Excluding Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Unamortized debt issuance costs     $ 17,100,000